Version history of the XML Gold Book
Releases
2012-03-23: Release 2.3.1. This release fixes a typing error in one term.
Entries changed in this release (1):
2011-10-11: Release 2.3. In this release many entries without an actual content, but containing only a link to a related item, were removed. Such entries were merged into the linked entries as subtitles, which means they still exist in the index. This led to a decrease in the number of pages from 7024 to 6414, but the number of index entries remains the same. Also, starting with this release, a Frequently Asked Questions (FAQ) page was introduced and a PDF rendering of the whole Gold Book is available for download.
Entries changed in this release (448):
- α (alpha), β (beta)
- abiotic
- abstraction process in catalysis
- acidity function
- activation
- activation energy (Arrhenius activation energy)
- activator
- activity,
of a radioactive material - acyl species
- adiabatic
- aggregate in catalysis
- allotropic transition
- ambident
- amidrazones
- amino-acid residue in a polypeptide
- amount fraction,
(
for gaseous mixtures) - amount of substance,

- analytical radiochemistry
- angle strain
- angular frequency,

- annihilation
- antarafacial
- anthelmint(h)ic
- anthocyanidins
- antimycotic
- apex current
- apical (basal, equatorial)
- arsanylidenes
- asymmetric transformation
- atomic spectral lines
- attenuance filter
- attractive potential-energy surface
- average current density
- axial (equatorial)
- azinic acids
- azomethine imides
- background concentration (level)
in atmospheric chemistry
- backscatter
- bag filter in atmospheric chemistry
- bending of energy bands
- biotransformation
- bisecting conformation (eclipsing conformation)
- black film
- bowsprit (flagpole)
- branch (side chain, pendant chain) in polymers
- branch unit in polymers
- bridge
- Brønsted relation
- bulk rheology
- Bunsen burner
- calibration function in analysis
- carbon dioxide laser (CO2 laser)
- carbon electrode
- carbonyl oxides
- carry-over
- catalyst
- catalyst decay
- catalytic activity concentration,

- catalytic activity content,

- catalytic activity fraction of an isozyme
- (chain) conformational repeating unit of a polymer
- chain polymerization
- chain-propagating reaction
- chair, boat, twist
- characteristic length in thin films
- characteristic X-ray emission
- chemical induction (coupling)
- chemical relaxation
- chemisorption (chemical adsorption)
- chirality axis
- chirality centre
- chirality element
- chirotopic
- CIDNP (Chemically Induced Dynamic Nuclear
Polarization)
- cis conformation in polymers
- cis-fused
- cis, trans
- coacervation
- coherence length,
in thin films - coherent scattering
- coherent source in spectrochemistry
- coherent structure
- col (saddle point)
- collisional broadening of a spectral line
- collision efficiency,

- colloid osmotic pressure (Donnan pressure)
- colour indicator
- comb macromolecule
- commensurate–incommensurate transition
- complementary DNA
(cDNA)
- composite mechanism
- Compton effect
- configuration (electronic)
- conjugated system (conjugation)
- consecutive reactions
- constitutional sequence in polymers
- contact potential difference (Volta potential
difference)
- contributing structure
- copolymer
- corrinoids (cobalamines, corphyrins, corrins, vitamin B12
compounds)
- corrosion rate
- counting efficiency
- coupled (indicator) reaction in analysis
- cracking
- critical solution point
- cryptand
- crystalline electrodes
- current distribution
- current efficiency
- cybotactic region
- cycloaddition
- cycloelimination
- clearance,
- Δ (delta), Λ (lambda)
- d, l, dl
- Davydov splitting (factor-group splitting)
- decay chain
- deflocculation (peptization)
- degeneracy
- delayed fluorescence
- deoxyribonucleic acids (DNA)
- depolymerization
- depsipeptides
- depth of penetration of light
- deuterium
- diamond by CVD
- diastereoisomer (diastereoisomeric) excess
- diastereoisomerism
- diazoates
- differential diffusion coefficient
- differential molar energy of adsorption
- diffuse layer in electrochemistry
- diluent in solvent extraction
- direct-injection enthalpimetry
- direct reaction
- disproportionation
- dissociative adsorption (dissociative chemisorption)
- dissociative surface reaction
- double-strand polymer
- dynamic surface tension
- E, Z
- eclipsing strain
- elastic collision
- electrocyclic reaction
- electrodecantation (or electrophoresis convection)
- electrode reaction rate constants
- electrogenerated chemiluminescence (ECL)
- electrothermal atomizer
in spectrochemical analysis
- elementary charge
- embryo
- enantiomer excess (enantiomeric excess)
- enantiomerically enriched (enantioenriched)
- enantiomerically pure (enantiopure)
- encapsulation in catalysis
- endo, exo, syn, anti
- ene reaction
- enthalpimetric analysis
- epoxy compounds
- erythro structures in a polymer
- erythro, threo
- excess volume (at a solid/liquid interface)
- excitation energy in in situ microanalysis
- extent of an interface (surface)
- extractant
- extraction factor,

- exchange repulsion
- emission anisotropy
- ferroelectric (antiferroelectric) transition
- field effect
- filler
- first-order phase transition
- Fischer projection (Fischer–Tollens projection)
- Fischer–Rosanoff convention (or Rosanoff convention)
- flash fluorimetry (phosphorimetry)
- flavonoids (isoflavonoids and neoflavonoids)
- flow injection enthalpimetry
- Förster excitation transfer (dipole–dipole excitation
transfer)
- fouling agent in catalysis
- Franck–Condon principle
- free rotation (hindered rotation, restricted
rotation)
- friction factor,

- frontier orbitals
- Frumkin effect
- full energy peak
- fractal dimension,

- gas black (carbon black, channel black, furnace
black)
- Gibbs surface
- glyco-amino-acid
- glycopeptides (glycoproteins)
- gradual (sudden) potential-energy surface
- graphite whiskers
- half life of a radionuclide
- halonium ions
- Hammond principle (Hammond postulate)
- hard acid
- hard base
- helicity
- helium–cadmium laser
- Henry's law
- higher-order transition
- homogeneity in analytical chemistry
- hydrazidines
- hydrocarbylsulfanyl nitrenes
- hydron
- hyperconjugation
- hysteresis
- halato-telechelic polymer
- (chain) identity period of a polymer
- icosanoids
- identity reaction
- imaging (photoimaging)
- indicated hydrogen
- induced reaction
- inherent viscosity of a polymer
- inhibition
- inhibitor
- inner layer (compact layer) in electrochemistry
- instantaneous (spot) sampling
in atmospheric chemistry
- interfacial double-layer
- internal energy,

- intrinsic viscosity of a polymer
- inverted micelle
- ion pair
- ion pair return
- isodiazenes
- isometric
- isomorphous structures in polymers
- isotope effect
- isotopic enrichment
- ion-exchange polymer
- ionic polymer
- ketoaldonic acids
- kinetic current
- kinetic electrolyte effect (kinetic ionic-strength effect)
- l, u
- laws of distribution in precipitation
- layer
- leader sequence in biotechnology
- lethal synthesis
- lifetime,
- lignans
- limiting catalytic current
- linear free-energy relation
- liquid-crystal transitions
- loading capacity in solvent extraction
- London forces
- lyophilic
- low-spin
- macromolecule (polymer molecule)
- macromonomeric unit (macromonomer unit)
- magnetic flux density,

- mancude-ring systems
- Markownikoff rule
- mass-average velocity in electrolytes
- mass-distribution function
- matched cells in spectrochemical analysis
- measurement result
- mechanism of a reaction
- mechanism-based inhibition
- mercury flow system in spectrochemical analysis
- merry-go-round reactor (turntable reactor)
- mesomeric effect
- mesomorphic phase
- mesophase pitch-based carbon fibres
- metal–carbene complexes
- metal–carbyne complexes
- metal–insulator transition
- micellar solubilization
- microscopic diffusion control (encounter control)
- migration
- minimum lethal concentration
(
)
- mixed crystal (solid solution)
- mobile adsorption
- molecular beams
- molecularity
- molecular mechanics calculation
- molecular rearrangement
- monolayer
- monomeric unit (monomer unit, mer)
- Morin transition
- Mott transition
- multi-strand chain in polymers
- multi-strand macromolecule
- mustards
- neighbouring group participation
- neodymium laser
- Nernst's diffusion layer
- network in polymer chemistry
- nitrenes
- nitrenium ions
- nitrile imides
- nitrile ylides
- nucleation in colloid chemistry
- ODMR (Optically Detected Magnetic Resonance)
- oligomer
- oligomer molecule
- open film
- optical filter
- order of reaction,
- osmotic concentration,

- overall activation energy
- oxoacids
- oxo carboxylic acids
- partial digestion in spectrochemical analysis
- partial isotherm (or individual isotherm)
in surface chemistry
- particle scattering function
- peak in chromatography
- pendant group (side group)
- peritectic reaction
- peritectoid reaction
- permeation chromatography
- pheromone
- phosphanylidenes
- phosphonium ylides
- photoadsorption
- photochemical reaction
- photodiode
- photoelectric peak
- photoelectrolytic cell
- photoelectron spectroscopy (PES)
- photoemissive detector
- photomultiplier tube
- photon exitance,

- phototransistor
- physisorption (physical adsorption)
- planar chirality
- plate number,
in chromatography - plus, minus
- polyketides
- polymer-poor phase
- polymer-rich phase
- pre-equilibrium (prior equilibrium)
- pre-exponential factor,
- preferential sorption in polymers
- pre-polymer molecule
- prochirality
- projection formula
- pros in histidine nomenclature
- protium
- pseudo-copolymer
- pseudorotation
- pulse amplitude analyser
- pulse amplitude selector
- quadrupole ion storage trap (Quistor)
- quantitative structure–activity relationships (QSAR)
- quenching
- quinomethanes
- racemate
- racemic conglomerate
- radial elution (radial development) or circular elution
(circular development)
in planar chromatography
- radiant exitance,

- radiation detector
- radiative absorption in spectrochemistry
- radiative de-excitation in spectrochemistry
- radical ion
- random coil in polymers
- rate of reaction,

- reaction path degeneracy
- reactive adsorption
- reduced viscosity of a polymer
- relative micellar mass
- relative viscosity
- repulsive potential-energy surface
- Re, Si
- resonance line in X-ray spectroscopy
- response time,
of a detector - responsivity,
in detection of radiation - retention index,
in column chromatography - retention volumes in chromatography
- ribonucleic acids (RNA)
- ribosomal RNA (rRNA)
- ring-sector
- R, S
- Rutherford backscattering (RBS)
- Saytzeff rule
- scattering angle,
- Schiller layers
- second-order transition
- sedimentation potential difference (sedimentation
potential)
- selective micro-sample in spectrochemical analysis
- selective poisoning in catalysis
- self-absorption factor of a radiation source
- self-poisoning in catalysis
- separated flame in flame spectroscopy
- shear thinning
- shielding
- SI
- soap
- solution
- solvolysis
- spectroscopy
- spin conservation rule (Wigner rule)
- spin label
- spin trapping
- spiro union
- stable film, metastable film
- standard equilibrium constant,
,
- standard solution
- Stark effect
- star macromolecule
- starting line in chromatography
- steady state (stationary state)
- stereoconvergence
- stereoselectivity
- stibanylidenes
- Stokes shift
- streak tube
- streaming birefringence
- subjacent orbital
- substrate in thin films
- sulfinylamines
- sulfoximides
- superacid
- superlattice
- surface dipole layer
- surface shear viscosity
- surfactant (surface active agent)
- symmetrical films
- terpenes
- test portion
- test solution in analysis
- thermodynamic control of product composition
- thermometric titration
- thermoptometry
- thin film
- thioacetals
- thioanhydrides
- titration
- topochemical reaction
- topomerization
- torsion angle
- transfer RNA (tRNA)
- transmission high energy electron diffraction
(THEED)
- transmittance,
,

- transport in analysis
- tritium
- ultimate capacity in solvent extraction
- volume viscosity (or dilatational viscosity)
- Walden inversion
- wetting tension (or work of immersional wetting per unit
area)
- wind rose
- work of adhesion
- work softening
- worm-like chain in polymers
- X-ray satellite
- ylides
- zwitterionic compounds/zwitterions
- zwitterionic polymer
2010-12-22: Release 2.2. The main new feature of this release is the introduction of PDF version of Gold Book definitions. PDFs are created from the same source as HTML pages, so 100% correspondence of content should be guaranteed. To download the PDFs, use a link at the bottom of each page. Note: this feature is now in a testing phase. Once it is mature enough, we might give it a more prominent place and consider providing more versions of the PDF output.
In this release, the display of automatically added links was changed to distinguish them visually from links added by authors.
2010-11-29: Release 2.1.6. This release contains a new definition of chemical shift.
Entries changed in this release (1):
2009-09-07: Release 2.1.5. This release contains a new service that allows users to try the goldify software online.
2009-09-02: Release 2.1.4. This release updates a reference of source document in the definition of pH and adds explicit edition number to references of the second edition of the IUPAC Green Book. It also includes a minor fix in the fulltext search function.
Entries changed in this release (1):
2009-07-28: Release 2.1.3. This release fixes an error in one term.
Entries changed in this release (1):
2009-07-03: Release 2.1.2. This minor update does not include any updates of the actual content of the GoldBook. It features a redesigned index of sum formulas and new resource files related to the software tools introduced in the previous release.
2009-07-02: Release 2.1.1. This minor update does not include any updates of the actual content of the GoldBook. It features a redesigned index of quantities, improvements of the HTML code structure and a few minor fixes. The most important new feature is the introduction of software tools that enable automatic addition of links to Gold Book terms into text and HTML documents.
2009-06-16: Release 2.1.0. New major update to the online version of the Gold Book. Almost 300 entries were either added or updated. There are also other improvements, such as better positioning of mathematical formulas on a line, acronyms as part of the title in alphabetical index, improved support for names of characters (such as alpha, lambda) in fulltext search, improved alternative text for images of mathematical formulas and other smaller changes. This release also includes a brand new structure search which complements the standard text-based search.
Entries changed in this release (287):
- 'A' value
- aerogel
- aerosol
- agglomeration (except in polymer science)
- atomic number,

- agglomerate in polymer science
- alcogel
- aquagel
- affine chain behaviour
- aerosol hydrolysis
- agglomeration in polymer science
- aggregation (except in polymer science)
- branch point in polymers
- bimodal network
- calcination
- critical micelle concentration
- crosslinking
- curing
- chemical functionality
- connectivity in polymer chemistry
- colloidal gel
- ceramer
- ceramic
- ceramic precursor
- ceramic-reinforced polymer
- ceramic yield
- composite
- creep
- chemically bonded hybrid (material)
- clay hybrid
- colloidal network
- compatible polymer blend
- chain entanglement
- crosslink density
- crosslinking site
- carbo-reduction
- ceramization
- colloidal processing
- drying control chemical additive
- densification
- exfoliation
- elastomer
- entanglement network
- elastically active network chain
- electron beam curing
- f-functional branch point
- functionality,
of a monomer - fractal agglomerate
- fractal dimension,

- gel
- general force field
- gel point
- gel time
- gelation temperature
- gel fraction
- green body
- hybrid material
- gel aging
- gelation
- height equivalent to an effective theoretical plate in chromatography
- height equivalent to a theoretical plate in chromatography
- hydrogel
- hybrid polymer
- homogeneous polymer blend
- hipping
- hydrolysis ratio,

- individual perception threshold in atmospheric chemistry
- intercalation reaction
- internal valence force field
- interpenetrating polymer network
- inorganic–organic polymer
- inorganic polymer
- in-situ composite formation
- isostatic pressing
- junction point
- junction-point density
- loose end
- Marcus equation (for electron transfer)
- medium-pressure mercury lamp
- mercury–xenon lamp
- microgel
- micro-network
- minimum-energy reaction path
- modulus of elasticity,
- molar absorption coefficient,

- monochromator
- magnetic circular dichroism
- multiconfiguration SCF method
- multiphase copolymer
- magic angle
- molecular orientation
- multireference configuration interaction
- mixed ceramic
- monolith
- model network
- microsyneresis
- non-vertical energy transfer
- normal region (for electron transfer)
- Norrish Type II photoreaction
- Norrish Type I photoreaction
- nth order phase transition
- nanocomposite
- non-crossing rule
- non-linear optical techniques
- Norrish–Yang reaction
- nucleophilic aromatic photosubstitution
- nanogel
- neutralized gel
- network
- network-chain molar mass,

- network defect
- net shaping
- optoacoustic spectroscopy
- orbital (atomic or molecular)
- osmotic pressure,
- Ostwald ripening
- OLED
- one-bond-flip
- one-photon photochromism
- optical multi-channel analyser
- optical parametric amplification
- optical parametric oscillator
- oxide network
- organic–inorganic polymer
- organically-modified ceramic
- organically modified silica
- phonon
- photoaffinity labelling
- photocatalysis
- photochemical reaction
- photochemical smog
- photochromism
- photochemical curing
- photoisomerization
- photoluminescence
- photon counting
- photon exitance,

- photon exposure,

- photon fluence,
,

- photon fluence rate,

- photon flux,
, 
- photon irradiance,

- photon radiance,

- physical network
- polarization,

- polymer blend
- pump-probe technique
- pyrolysis
- polymer gel
- polymer alloy
- parametric amplification
- parametric processes
- Peierls distortion
- phosphorescence lifetime
- photo-Bergman cyclization
- photobiology
- photocatalyst
- photochemical funnel
- photochemical reaction path
- photo-Claisen rearrangement
- photocyclization
- photocycloaddition
- photochemical nitrogen extrusion
- photodecarbonylation
- photodecarboxylation
- photodeconjugation
- photohydration
- photon echo
- photon number,
- photorearrangement
- photoselection
- PLED
- pump-dump-probe technique
- pre-gel regime
- pre-gel state
- particulate sol
- polymeric sol
- particulate gel
- polyelectrolyte gel
- perfect network
- polymer-derived ceramic
- permanent crosslink
- phantom chain behaviour
- precipitation in sol-gel processing
- peptization
- quantum yield,

- quartz–iodine lamp
- quenching
- quantum mechanics/molecular mechanics
- radiance,

- radiant exitance,

- radiant exposure,

- radiant (energy) flux,
,

- radiant intensity,

- radiant power,

- radiationless deactivation
- radiative energy transfer
- radiative lifetime,

- reflectance,

- Renner–Teller effect
- reorganization energy in electron transfer
- resonance lamp
- radiation trapping
- radical photosubstitution
- Rehm–Weller equation
- residual emission anisotropy
- rotational correlation time,
or 
- rotational relaxation time,

- responsive gel
- rheopexic gel
- ringing gel
- reversible network
- reaction injection moulding
- reinforced reaction injection moulding
- reactive polymer processing
- Schenck-sensitization mechanism
- semi-interpenetrating polymer network
- single-photon timing
- singlet molecular oxygen (singlet molecular dioxygen)
- sintering
- sol-gel transition
- syneresis
- soliton
- sol-gel process
- Schenck reaction
- singlet–triplet crossing
- solvent-induced symmetry breaking
- spectral fluence rate,

- spectral radiant energy,

- spin-flip method
- spin-statistical factor (in diffusion-controlled reactions)
- slip
- sonosol
- sol fraction
- sonogel
- swelling agent
- sequential interpenetrating polymer network
- simultaneous interpenetrating polymer network
- sequential semi-interpenetrating polymer network
- simultaneous semi-interpenetrating polymer network
- sol-gel material
- sol-gel coating
- sol-gel metal oxide
- sol-gel silica
- sedimentation in chemistry
- shrinkage
- slip casting
- sol-gel critical concentration
- supercritical drying of a gel
- time-resolved microwave conductivity
- transition (dipole) moment
- triplet-triplet energy transfer
- twisted intramolecular charge transfer
- thermoplastic elastomer
- time-dependent density functional theory
- time-resolved fluorometry
- transient-stimulated emission pumping
- tungsten-halogen lamp
- two-photon photochromism
- thermoreversible gel
- thixotropic gel
- theoretical ceramic yield
- thermoreversible network
- transient network
- transient crosslink
- thermoreversible junction point
- transient junction point
- thermal curing
- upconversion
- UV photoelectron spectroscopy
- ultraviolet
- uniaxial sample
- uniaxial pressing
- valence band
- volume strain,
- vulcanization
- visible
- VUV
- viscous sintering
- wavefunction,
,
,
- Weller correlation
- Wood lamp
- Wigner matrices
- wolfram lamp
- xerogel
- Yang photocyclization
of a photochromic system
2009-03-17: Release 2.0.4. InChI metadata were updated to the standard InChI and InChIKey.
2009-02-17: Release 2.0.3. This is maintenance release containing fixes in several entries.
Entries changed in this release (3):
2008-10-07: Release 2.0.2. This is maintenance release containing a fix in the value of Faraday constant.
Entries changed in this release (1):
2008-09-12: Release 2.0.1. This is maintenance release containing a few fixes in the information about the XML Gold Book project and adding release date to the information on each page. There are no changes in the content.
2008-09-04: Release 2.0.0. This major update brings more than 300 new terms prepared by Aubrey Jenkins from new IUPAC Reports and Recommendations, new and better rendering of mathematical equations, many updates and fixes to existing terms, new server-side search and addition of InChIKey alongside InChI into the page metadata. DOIs were registered for all Gold Book entries (you can find them on pages of individual terms) as well as for the Gold Book itself.
Entries changed in this release (377):
- α-cleavage (alpha-cleavage)
- absorption
- acetals
- AM 0 sunlight
- AM 1 sunlight
- anils
- aromaticity
- atomic units
- Avogadro constant
- ab initio quantum mechanical methods
- agostic interaction
- alternancy symmetry
- angular overlap model (AOM)
- antiaromaticity (antithetical to aromaticity)
- antibonding molecular orbital
- antisymmetry principle
- apicophilicity
- atom-atom polarizability
- atom-bond polarizability
- atomic charge
- aufbau principle
- ampholytic polymer
- anion-exchange polymer
- anionic polymer
- absorbed (spectral) photon flux density
- absorbed (spectral) radiant power density
- actinic
- actinism
- acyl shift (1,2-, 1,3-, photochemical)
- alkene photocycloaddition
- alkene photodimerization
- alkene photoisomerization
- alkene photorearrangement
- amalgam lamp
- aromatic photocycloaddition
- asymmetric photochemistry
- aza-di-π-methane rearrangement
- biphotonic excitation
- biphotonic process
- Boltzmann constant
- biomarker
- back donation
- basis function
- basis set
- Bent's rule
- binding energy
- bond energy in theoretical chemistry
- bond length
- bond orbital
- bond order
- bond-dissociation energy (BDE) in theoretical chemistry
- bonding molecular orbital
- Born–Oppenheimer (BO) approximation
- biodegradable polymer
- bicycle-pedal (BP) mechanism
- bicycle rearrangement
- bipolarons
- branching plane
- Brewster angle,

- brightness
- brightness of a laser dye
- cathodic transfer coefficient,

- crystal field
- chemical bond
- closed shell molecular systems
- concerted reaction
- conservation of orbital symmetry
- Coulomb repulsion
- coupled cluster (CC) method
- curve-crossing model
- chemical amplification
- chemical modification
- crosslinking
- curing
- chelating polymer
- conducting polymer
- cation-exchange polymer
- cationic polymer
- conducting polymer composite
- critical ion-concentration in an ionomer
- chemically induced dynamic electron polarization (CIDEP)
- chemically initiated electron exchange luminescence (CIEEL)
- colourability
- color scale
- complete active space self-consistent field (CASSCF)
- complete active space self-consistent field second-order perturbation theory (CASPT2)
- computational photochemistry
- concentration depolarization
- conical intersection
- continuous wave (CW) laser
- conversion cross-section
- crystal photochemistry
- cut-on filter
- dative bond
- degenerate orbitals
- delocalization in theoretical organic chemistry
- delocalization energy (DE)
- dynamic reaction path (DRP)
- dopant
- doping in polymer chemistry
- DAS
- Dauben–Salem–Turro rules
- de Mayo reaction
- dichroic filter
- dichroic mirror
- dichroism
- diradicaloid
- di-π-silane rearrangement
- dose
- downconversion
- driving force (for electron transfer)
- Drude–Nernst equation (for electrostriction)
- dual fluorescence of systems or molecular species
- dual-mode photochromism
- electric potential difference,
of a galvanic cell - electronvolt
- elementary charge
- electron-counting rules
- electron-deficient compounds
- electron density function
- electronic chemical potential
- electronic state
- electronic stability
- energy gradient
- energy hypersurface (synonymous with potential energy surface, PES)
- equalization of electronegativity, principle of
- equilibrium geometry
- extended Hückel MO method (EHMO)
- exchange repulsion
- electroluminescent polymer
- electrically conducting polymer
- exfoliation
- extender
- electron back-transfer
- electrostriction
- El-Sayed rules
- emission anisotropy
- entrainment in photochemistry
- excimer lamp
- exposure in photochemistry
- E/Z photoisomerization
- Faraday constant
- frequency,
, 
- ferroelectric polymer
- ferromagnetic polymer
- functional polymer
- fibrillar morphology
- fatigue of a photochromic system
- fluence rate,

- fluorescence lifetime
- fluorescence resonance energy transfer
- fluorogenic
- fluorophore
- Förster-resonance-energy transfer FRET
- Fourier-transform spectroscopy
- frequency,
,
in photochemistry - frequency-domain fluorometry
- FRET
- gas constant
- grafting in polymer chemistry
- gated photochromism
- geminate ion pair
- Gibbs energy of photoinduced electron transfer
- global analysis
- Hückel molecular orbital (HMO) theory
- harmonic approximation
- homodesmotic reaction
- hybrid orbital
- hydrogen bond in theoretical organic chemistry
- hypercoordination
- hyperfine coupling
- hyperpolarizability (of nth order)
- hypervalency
- halato-telechelic polymer
- homologous polymer blend
- hard-segment phase domain
- half-life,
, of a photochromic system - half-life,
, of a transient entity - heliochromism
- hula-twist (HT) mechanism
- hyperfine (interaction)
- interpenetrating polymer network
- ionomer
- irradiance (at a point of a surface),

- isoemissive point
- isooptoacoustic point
- isosbestic point
- isostilbic point
- individual gauge for localized orbitals (IGLO)
- instability of Hartree–Fock solution
- intrinsic reaction coordinate
- ionic bond
- isoconjugate systems
- isogyric reaction
- isostructural reaction
- interchange reaction
- ion-exchange polymer
- impact-modified polymer
- intrinsically conducting polymer
- ionene
- ionic aggregates in an ionomer
- ionic polymer
- ionomer cluster
- ionomer multiplet
- isomorphic polymer blend
- immiscibility
- immiscible polymer blend
- impregnation in polymer chemistry
- intercalation in polymer chemistry
- interfacial adhesion
- IC
- ICT
- ICT emission
- infrared
- intersection space
- intramolecular charge transfer, (ICT)
- ISC
- isolampsic point
- Jahn–Teller effect
- Kasha rule
- Koopmans' theorem
- lifetime,
- light polarization
- low-pressure mercury lamp (arc)
- lipophilicity
- least motion, principle of
- Lewis octet rule
- localized molecular orbitals (LMO)
- low-spin state
- living polymer
- liquid-crystalline polymer
- LADS
- Landau–Zener model
- LAS
- laser dye
- laser-jet photochemical technique
- LED
- light-emitting diode (LED)
- linear dichroism (LD)
- macromonomer
- mercury–xenon lamp
- mesophase
- MOL file format
- molfile
- maximum hardness, principle of
- molecular graph
- molecular graph theory
- molecular Rydberg state
- Monte Carlo (MC), method of
- Morse potential
- Mulliken population analysis (MPA)
- multiconfiguration SCF method
- main-chain scission
- Mechano-chemical reaction
- macroporous polymer
- miscibility
- miscibility gap
- morphology coarsening
- morphology
- multiphase copolymer
- microdomain morphology
- multicoat morphology
- multiple inclusion morphology
- natural atomic orbital (NAO)
- natural bond orbital (NBO)
- natural hybrid orbital (NHO)
- natural orbital
- natural population analysis (NPA)
- negative hyper-conjugation
- nodal plane
- nonbonding molecular orbital
- nonclassical structure
- non-Kekulé molecules
- normalization
- non-linear optical polymer
- nanocomposite
- nucleation of phase separation in polymer chemistry
- nanodomain morphology
- open-shell systems
- optically active polymer
- onion morphology
- ordered co-continuous double gyroid morphology
- permittivity of vacuum
- pH
- Planck constant
- polyelectrolyte
- polymer blend
- polymer–polymer complex
- Pariser–Parr–Pople (PPP) method
- Pauli exclusion principle
- perturbation theory
- pre-reactive complexes
- polymer complexation
- polymer cyclization
- polymer degradation
- polymer functionalization
- polymer reaction
- polymer-supported reaction
- protection of a reactive group
- polymer catalyst
- polymer-metal complex
- polymer phase-transfer catalyst
- polymer-supported catalyst
- polymer reactant
- prepolymer
- photo-elastic polymer
- photoluminescent polymer
- photosensitive polymer
- piezoelectric polymer
- polymer compatibilizer
- polymer drug
- polymer gel
- polymer membrane
- polymer solvent
- polymer sorbent
- polymer support
- polymer surfactant
- polyacid
- polybase
- polybetaine
- polyelectrolyte complex
- polyelectrolyte network
- polymer composite
- prepreg
- polymer alloy
- phase domain
- phase interaction
- polaron
- planar intramolecular charge transfer
- redox polymer
- retention index,
in column chromatography - relative hardness
- relativistic effects
- resonance hybrid
- ribbon delocalisation
- Rydberg state
- radiation reaction
- reactive blending
- reactive polymer
- resin
- resist polymer
- rod-like morphology
- semi-interpenetrating polymer network
- scaling factor
- secular equation
- Slater determinant
- soliton
- solvation energy
- spin contamination
- spin crossover
- spin polarization
- spin projection
- stereochemical non-rigidity
- strain energy
- structural stability
- sudden polarization
- supramolecular chemistry
- sol-gel process
- surface grafting
- shape-memory polymer
- superabsorbent polymer
- solid polymer electrolyte
- spinodal
- soft-segment phase domain
- segmented copolymer
- spectral sensitivity,

- self-localized excitations in conjugated organic polymers
- solubility parameter,

- twisted intramolecular charge transfer
- telechelic polymer
- thermosetting polymer
- thermoplastic elastomer
- upper critical solution temperature
- vulcanization
- wetting
- zero differential overlap (ZDO) approximation
- zwitterionic polymer
2008-02-28: Release 1.1.2. Before a planned major update we have decided to publish a minor bugfix release. It contains fixes of several errors in the content and in the chemistry indexes. Also few obsolete indexes were removed and the source information for PAC articles were updated.
Entries changed in this release (7):
2007-07-12: Release 1.1.1. In this release one error was fixed (1) and the incremental search usability was improved (thanks to Robert M. Hanson).
Entries changed in this release (1):
2006-12-11: Release 1.1.0. In this release three errors were fixed (1, 2, 3). The page of each entry now features links to a printer friendly version and a page containing history of the term. RSS feed was created that will notify users about new releases of the Gold Book.
Entries changed in this release (3):
2006-09-29: Release 1.0.0. First release published after the review and approval of both IUPAC committees involved (CPEP and ICTNS).
Preview releases
2006-09-13: Fifth (and last) preview release (0.5.0). This release contains an updated "about" section and some minor changes in other parts of the site. It is the last preview release before the site will be moved onto the IUPAC website and release 1.0.0 will be made.
2006-09-11: First revision of the fourth public preview release (0.4.1). In this release several minor fixes were introduced throughout the Gold Book. This release also introduces InChIs for all the chemical structures as meta-data inside each entry.
2006-09-01: Fourth public preview release (0.4.0). This release was focused on cleanup
of problems discovered during the review process. Most importantly, rendering of symbols of vector quantities was
fixed. Also several changes were made throughout the publication, improving usability and consistency.
2006-05-19: Third public preview release (0.3.0). In this release, all new entries submitted by Aubrey Jenkins
were added (242 items), sorting of the entries was fixed to match that of the printed version, the HTML
code was slightly revised to improve readability and some minor problems were fixed.
2006-04-29: Second public preview release (0.2.0). Almost one-third of the entries were
updated from the first preliminary public release. These were mainly small fixes (typically in
missing punctuation), but there were also many more serious problems such as missing reactions or formulas.
Overall the Gold Book should be now prepared for public review.
2005-05-27: Minor fixes (0.1.1).
2005-03-17: First public preview release (0.1.0).