Laser flash photolysis study of the kinetics of electron transfer reactions of flavocytochrome b2 from Hansenula anomala: further evidence for intramolecular electron transfer mediated by ligand binding

Biochemistry ◽  
1992 ◽  
Vol 31 (10) ◽  
pp. 2798-2805 ◽  
Author(s):  
Mark C. Walker ◽  
Gordon Tollin
Keyword(s):  
Electron Transfer ◽  
Ligand Binding ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Transfer Reactions ◽  
Intramolecular Electron Transfer ◽  
Flavocytochrome B2 ◽  
Hansenula Anomala ◽  
Kinetics Of

Laser flash photolysis studies of intramolecular electron transfer in milk xanthine oxidase

Biochemistry ◽  
1983 ◽  
Vol 22 (23) ◽  
pp. 5270-5279 ◽  
Author(s):  
Anjan Bhattacharyya ◽  
Gordon Tollin ◽  
Michael Davis ◽  
Dale E. Edmondson
Keyword(s):  
Electron Transfer ◽  
Xanthine Oxidase ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Intramolecular Electron Transfer

Intramolecular photoinduced electron-transfer processes in buta-1,3-diynyl-benzene-linked porphyrin-fullerene dyad

2007 ◽  
Vol 11 (06) ◽  
pp. 397-405 ◽  
Author(s):  
Ken-ichi Yamanaka ◽  
Mamoru Fujitsuka ◽  
Yasuyuki Araki ◽  
Kentaro Tashiro ◽  
Azumi Sato ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transient Absorption ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Phenyl Group ◽  
Laser Flash ◽  
Ion Pair ◽  
Intramolecular Electron Transfer ◽  
Electron Transfer Processes ◽  
Absorption Measurements

Intramolecular electron-transfer process of porphyrin-fullerene dyad linked by phenyl buta-1,3-diynyl-phenyl unit ( ZnP - sp - C 60) was studied by laser flash photolysis. Picosecond fluorescence lifetime and transient absorption measurements revealed that photoinduced charge-separation takes place via the excited singlet state (1 ZnP *) with the rate constant of (1-2) × 1010 s −1. For the charge recombination, about a half of the radical-ion pair decayed quickly with 2.9 × 109 s −1 as evaluated from picosecond transient absorption measurements, whereas the remaining half was long-lived with slow decay (1.6 × 106 s −1) as estimated from nanosecond transient absorption measurements. The lifetime of the radical-ion pair of ZnP - sp - C 60 was longer than those of directly connected dyads with a buta-1,3-diynyl bridge and buta-1,3-diynyl-phenyl bridge by the insertion of an extra phenyl group in addition to the pyrrodino ring.

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