inorganic chemistry

become necessary to sensitize the systems by introducing
additional excited state levels.

A.3. Spectral sensitization

The process of photosensitization occurs, whenever the absorp-
tion of radiation by one molecular entity causes photophysical or
photochemical alterations in another molecular entity or

TABLE III

SOMEBIOINORGANICCHROMOPHORES

Metalloprotein Metal Absorptiona Assignment Reference

Horseradish peroxidase Fe 400
(100,000)

LC ( 42 )

Cytochrome P450 Fe 363 (50,000) LC/LLCT ( 59 )
Methylmalonyl CoA
mutase

Co 376 (12,800) LC/LLCT ( 60 )

Methyl CoM reductase Ni 420 (22,000) LC ( 61 )
Bovine serum amine
oxidase

Cu 480 (3500) LC ( 62 )

Ribonucleotide reductase Fe/Mn 408 (3400) LC (63,64)
Galactose oxidase Cu 900 (1000) LLCT ( 65 )
Deoxyhemerythrin Fe 1110 (4) MC ( 66 )
Nitrile hydratase Co 575 (30) MC ( 67 )
CuZn superoxide
dismutase

Cu 610 (155) MC ( 68 )

Cytochromecoxidase Cu–Cu 769 (1500) MMCT/MC ( 69 )
Photosystem II Mn,
Mn

820 (?) MMCT/MC ( 70 )

Clavaminate synthase Fe 500 (375) MLCT ( 71 )
Taurinea-KG
dioxygenase

Fe 530 (140) MLCT ( 72 )

Methyl CoM reductase Ni 754 (2500) MLCT (61,73)
Vanadium
chloroperoxidase

V 315 (3000) LMCT (?) ( 74 )

Mn superoxide dismutase Mn 480 (800) LMCT ( 75 )
Acid phosphatase Mn 515 (2460) LMCT ( 76 )
Formate dehydrogenase Fe 400(16,000) LMCT ( 77 )
Rubredoxin Fe 490 (8700) LMCT ( 78 )
Phenylalanine
hydroxylase

Fe 700 (1140) LMCT ( 79 )

Thiocyanate hydrolase Co 340 (?) LMCT (?) ( 80 )
Azurin Cu 630 (5000) LMCT ( 81 )
Ascorbate oxidase Cu 610 (9600) LMCT ( 82 )
DMSO reductase Mo 720 (2000) LMCT ( 83 )
DMSO reductase W 560 (1800) LMCT ( 84 )

aWavelength (nm) (eM (^1) cm (^1) ); approximate values extracted from the published
data.
PHOTOSENSITIZATION AND PHOTOCATALYSIS 247