Entries from:

PAC, 1996, 68, 2223. Glossary of terms used in photochemistry (IUPAC Recommendations 1996), doi:10.1351/pac199668122223

α-cleavage (alpha-cleavage)
absorbance,
absorptance,
absorption
absorption coefficient
absorption cross-section,
absorptivity
actinometer
action spectrum
adiabatic electron transfer
adiabatic photoreaction
ADMR
AM (0) sunlight
AM (1) sunlight
annihilation
antimony–xenon lamp (arc)
anti-Stokes shift
apparent lifetime
argon ion laser
attenuance,
attenuance filter
auxochrome
avoided crossing of potential-energy surfaces
back electron transfer
bandgap energy
bandpass filter
Barton reaction
bathochromic shift (effect)
Beer–Lambert law (or Beer–Lambert–Bouguer law)
bioluminescence
biphotonic excitation
biphotonic process
biradicaloid
bleaching in photochemistry
blue shift
cadium–helium laser
carbon dioxide laser (CO₂ laser)
cavity dumping in photochemistry
charge hopping
charge recombination
charge separation
charge shift
charge-transfer (CT) state
charge-transfer (CT) transition
charge transfer transition to solvent (CTTS)
chemical laser
chemiexcitation
chemiluminescence
chromophore
CIDEP (Chemically Induced Dynamic Electron Polarization)
CIDNP (Chemically Induced Dynamic Nuclear Polarization)
CIEEL (Chemically Initiated Electron Exchange Luminescence)
coherent radiation
CO₂ laser
collision complex
conduction band
configuration (electronic)
configuration interaction (CI)
conversion spectrum
copper vapour laser
correlation diagram
correlation energy
critical quenching radius,
crystal field splitting
CT
current yield
cut-off filter
CW
dark photochemistry (photochemistry without light)
Davydov splitting (factor-group splitting)
deactivation
DEDMR
delayed fluorescence
depth of penetration of light
Dexter (electron exchange) excitation transfer
DFDMR
diabatic electron transfer
diabatic photoreaction
di-π-methane rearrangement
diode laser
dipolar mechanism of energy transfer
dipole–dipole excitation transfer
dose
doublet state
driving force (affinity) of a reaction,
dye laser
dynamic quenching
effectiveness
efficiency, of a step
efficiency spectrum
einstein
electrochemiluminescence
electrochromic effect
electrogenerated chemiluminescence (ECL)
electroluminescence
electron correlation
electron exchange excitation transfer
electronically excited state
electronic configuration
electronic energy migration (or hopping)
electron transfer
electron transfer photosensitization
electrophotography
emission
emission spectrum
emittance,
encounter complex
encounter pair
energy migration
energy pooling
energy storage efficiency,
energy transfer in photochemistry
energy transfer plot in photochemistry
enhancer
ESCA
excimer
excimer laser
exciplex
excitation spectrum
excitation transfer
excited state
exciton
exitance
external heavy atom effect
exterplex
extinction
extinction coefficient
factor-group splitting
Fermi level,
flash photolysis
fluence, , ,
f number
Förster cycle
Förster excitation transfer (dipole–dipole excitation transfer)
Fourier transform spectrometer
Franck–Condon principle
Franck–Condon state
free electron laser
free-running laser
frequency, ,
frequency doubling
FWHM (Full Width at Half Maximum)
gas laser
Gaussian band shape
ground state
half-width of a band
Hammond–Herkstroeter plot
harmonic frequency generation
harpoon mechanism
heavy atom effect
helium–cadmium laser
helium–neon laser
Herkstroeter plot
heteroexcimer
high-pressure mercury lamp (arc)
hole burning
hole transfer
hot ground state reaction
hot quartz lamp
hot state reaction
Hund rules
Hush model
hyperchromic effect
hypochromic effect
hypsochromic shift
imaging (photoimaging)
incoherent radiation
inner filter effect
inner-sphere electron transfer
integrating sphere
intended crossing of potential-energy surfaces
intensity
interference filter
interferometer
internal conversion
internal transmittance
intersystem crossing
intervalence charge transfer
inverted region (for electron transfer)
irradiance,
isoabsorption point
isoclinic point
isoemissive point
isooptoacoustic point
isostilbic point
Jablonski diagram
Jahn–Teller effect
Kaptein–Closs rules
Kasha rule
Kasha–Vavilov rule
Koopmans' theorem
krypton ion laser
Lambert law
lamp
Laporte rule
laser
lasing
latent image
lifetime (mean lifetime),
ligand field splitting
ligand to ligand charge transfer (LLCT) transition
ligand to metal charge transfer (LMCT) transition
light polarization
light source
Lorentzian band shape
low-pressure mercury lamp (arc)
luminescence
lumiphore (luminophore)
Marcus–Hush relationship
Marcus inverted region (for electron transfer)
medium-pressure mercury lamp (arc)
mercury–xenon lamp (arc)
merry-go-round reactor (turntable reactor)
metal to ligand charge transfer (MLCT) transition
metal to metal charge transfer (MMCT) transition
mode-locked laser
multiphoton absorption
multiphoton process
multiplicity (spin multiplicity)
n → π* state
n → π* transition
n → σ* transition
natural lifetime
neodymium laser
neutral-density filter
nitrogen laser
nonadiabatic electron transfer
nonadiabatic photoreaction
non-linear optical effect
non-radiative decay
non-vertical energy transfer
normal region (for electron transfer)
Norrish type II photoreaction
Norrish Type I photoreaction
ODMR (Optically Detected Magnetic Resonance)
optical density
optical filter
optoacoustic spectroscopy
oscillator strength,
outer-sphere electron transfer
oxa-di-π-methane rearrangement
π – π* state
π → π* transition
π → σ* transition
Paterno–Büchi reaction
PDMR
penetration depth
phonon
phosphorescence
photoacoustic effect
photoacoustic spectroscopy
photoaffinity labelling
photoassisted catalysis
photocatalysis
photochemical hole burning
photochemical reaction
photochemical smog
photochemistry
photochromism
photoconductivity
photocrosslinking
photocuring
photocurrent yield
photodegradation
photodetachment of electrons
photodynamic effect
photoelectrical effect
photoelectrochemical cell
photoelectrochemical etching
photoelectrochemistry
photoelectron spectroscopy (PES)
photoexcitation
photo-Fries rearrangement
photogalvanic cell
photoimaging
photoinduced electron transfer
photoinduced polymerization
photoinitiation
photoionization
photoluminescence
photon
photon counting
photon emittance
photon exitance,
photon exposure,
photon flow,
photon fluence,
photon fluence rate,
photon flux
photon irradiance,
photon radiance,
photooxidation
photooxygenation
photophysical processes
photopolymerization
photoreaction
photoreduction
photoresist
photosensitization
photosensitizer
photostationary state
photothermal effect
photothermography
photovoltaic cell
piezoluminescence
polarization
population inversion
precursor complex
predissociation
primary photochemical process (primary photoreaction)
primary (photo)process
primary (photo)product
pump-probe technique
Q-switched laser
quantum of radiation
quantum counter
quantum efficiency
quantum yield,
quartet state
quartz–iodine lamp
quencher
quenching
quenching constant in photochemistry
radiance,
radiant emittance
radiant energy,
radiant exitance,
radiant exposure,
radiant (energy) flux, ,
radiant power, ,
radiationless deactivation (decay)
radiationless transition
radiative energy transfer
radiative lifetime,
radiative transition
radical pair (geminate pair)
radioluminescence
red shift
relative spectral responsivity
Renner–Teller effect
reorganization energy,
resonance absorption technique
resonance fluorescence
resonance fluorescence technique
resonance lamp
resonance line in photochemistry
resonance radiation
rovibronic state
ruby laser
Rydberg orbital
Rydberg transition
RYDMR
σ → σ* transition
sacrificial acceptor
sacrificial donor
Schenck sensitization mechanism
scintillators
selection rule
self-absorption
self-quenching
sensitization
sensitizer
simultaneous pair transitions
single photon counting
single photon timing
singlet molecular oxygen
singlet-singlet annihilation
singlet-singlet energy transfer
singlet state
singlet-triplet energy transfer
solar conversion efficiency
solid state lasers
solvatochromism
solvent shift
sonoluminescence
specific photon emission
spectral (photon) effectiveness
spectral irradiance,
spectral overlap
spectral photon exitance,
spectral photon flow,
spectral photon flux (photon irradiance),
spectral photon radiance,
spectral radiance,
spectral radiant exitance,
spectral radiant flux
spectral radiant intensity,
spectral radiant power,
spectral responsivity
spectral sensitization
spherical radiance
spherical radiant exposure
spin-allowed electronic transition
spin conservation rule (Wigner rule)
spin-orbit coupling
spin-orbit splitting
spin–spin coupling
spontaneous emission
Stark effect
state crossing
state diagram
static quenching
Stern–Volmer kinetic relationships
stimulated emission
Stokes shift
superexchange interaction
superradiance
surface crossing
thermal lensing
thermally activated delayed fluorescence
thermochromism
thermoluminescence
through-bond electron transfer
through-space electron transfer
TICT emission
TICT state
time-correlated single photon counting
time-resolved microwave conductivity (TRMC)
time-resolved spectroscopy
transient spectroscopy
transition (dipole) moment
transition polarization
transmittance, ,
triboluminescence
triplet state
triplet-triplet annihilation
triplet-triplet energy transfer
triplet-triplet transitions
trivial energy transfer
tunnelling
turntable reactor
twisted internal charge transfer (TICT)
two-photon excitation
two-photon process
upconversion
UV dose
UV photoelectron spectroscopy (UPS)
UV stabilizer
valence band
Vavilov rule
vertical transition
vibrational redistribution
vibrational relaxation
vibronic coupling
vibronic transition
wavelength,
wavenumber, ,
Weller correlation
Wigner rule
Wood horn
Wood lamp
xenon lamp
XPS
YAG
Zeeman effect
zero field splitting
zero–zero (0–0) absorption or emission