quantum yields, 210t
reduced porphyrins, 212
Positive hole, 401–402, 402f
Q
Quantum efficiency, 411– 413
R
Rate-determining step, 413–414, 414f
Rhenium(I) diimine complexes
electronic structure
electronic states, 141
energy diagram, electronic
states, 141f
photostability, 141
structure, 140f
fac-Re(bpy)(CO)3Cl, higher excited
states
irradiation, 163– 165
linear-shaped Re(I) oligomers
and polymers, 163f
photochemical isomerization, 165
photophysical and
thermodynamic data, 137–186,
160t
picosecond and nanosecond
difference TR-IR spectra, 166f
Rhenium molecular rectangle,
162f
ligand
alkylation, 166– 167
intramolecular sensitization, 167
stilbene-type, 167
light-harvesting system, periodic
mesoporous organosilica,
180 – 181
mononuclear
gas–solid state reactions, 171
one-electron reduced (OER)
species, 169– 170
sacrificial reductant, 168
multicomponent systems
drawback, 177– 178
role, 176– 177
multinuclear
linear-shaped multinuclear
complexes, 161– 163
molecular polygons, 160– 161
polymer C, 160
properties, 160
thermal activation, 161
photochemical CO elimination
electron-donating mechanisms,
147
low-spin d^6 electron
configuration, 146
photoexcitation process, 147
photochemical ligand substitution
reaction, fac-[Re(diimine) (CO)
3PR3]þ
Arrhenius plots, 156f
13C NMR spectra, 152f
dissociative and associative
mechanisms, 151
energyvs.Re–CO distance, 158
IR absorption bands, 151
isomerization, 151
isosbestic points, 150– 151
modification effects, 152– 154
photophysical properties,
137 – 186, 155t
P(OEt) 3 ligand, 150– 151
potential energies, 158
relaxation processes, 154– 155
stabilization and destabilization,
154
trans-effects, ligands, 160
transient IR absorption (TR-IR)
spectra, 151– 152
UV/Vis absorption spectral
changes, 150f
photofunctional molecules, 138– 139
photophysical relaxation process
broad band, 142
chemical modification, 141
energy gap law, 142– 143
phosphorous ligand, 142
UV/Vis absorption and emission
spectra, 142f
properties and applications, 139
reaction mechanism
CO2 adduct, 175(^3) MLCT excited state, 172
OER species, 173
Re(I) diimine tetracarbonyl
complexes
irradiation, 149
reaction quantum yields, 149
INDEX 437