Light absorption and sensitization
bioinorganic chromophores
Clostridium pasteurianum, 246f
electronic transitions, 244–245,
245f
examples, 247t
ligand-to-metal charge transfer
(LMCT), 245
photoresponsive biomolecules
cytochromes, 241
metalloproteins influenced, 244t
mitochondrial signaling pathway,
241 – 242
natural photoantenna
chromophores, 240f
photoinduced electron transfer
(PET), 242
Rhodomicrobium, 241
spectral sensitization
aspects, 248
bacteriochlorophyll a, electronic
spectrum, 249f
photosensititzer Ru(bpy) 32 þ,
250 – 251, 251f
porphyrins, 248
Light-driven model enzymes,
278 – 279
Luminescent complexes.Seed^6 metal
complexes
Luminescent lanthanide sensors
ancillary ligands, effects
acetylsalicylic acid (ASA), 27– 28
analyte binding affinity, 20– 21
anionic interferents, 12– 13
applications, 12
association constants, 17f
bacterial spore detection, 13f
binding affinities, 19t
catecholamines (CAs), 22
chemical marker, 12
cyclic and acyclic, 23– 24
detection methods, 22
dipicolinate, 11
DO2A helper ligand, 16
dormant spore state, 11– 12
enhanced receptor effect, 17
ethylenediaminetetraacetic acid
(EDTA), 23
excitation spectra, 25f
fluorescence spectrophotometry,
12
gadolinium break, 17– 18
harmonic oscillators, 10– 11
hydration number, 14
lanthanide-macrocycle binary
complexes, 18– 19
lifetime measurements, 15t
limit of detection (LOD) values,
21 – 22, 21f
macrocyclic ligand, 13– 14
nonradiative decay, 14
pH dependence studies, 26
photophysical properties, 15
protonation constants, 23t
salicylurate (SU), 28
stability constants, 24t
complex stability
oxophilicity, 31– 35
steric effects, 30
coordination number, 4
definition, 2
density functional theory (DFT), 39
electronic configurations, 4
germination curves, 37f
lanthanide contraction, 5
luminescent ternary complex, 3f
microscopic endospore viability
assay, 36
properties, 3
rare earth elements, 2
receptors
ancillary ligand, 10
binary complexes, 10
terbium and europium, 9
sensitization
absorption-energy transfer-
emission (AETE) mechanism,
6 – 7
advantages, 8– 9
chromophore, 6
demonstration, 5– 6
emission spectra, 7– 8
energy level, triplet excited
state, 8f
Jablonski diagram, 7f
radiative and nonradiative
pathways, 6
Stokes shift, 7– 8434 INDEX