ENERGY AND ELECTRON-TRANSFER PROPERTIES OF METHYL PHEOPHORBIDE-A IN ZINC PORPHYRIN PHEOPHORBIDE DYADS

Authors
SHINODA S TSUKUBE H NISHIMURA Y YAMAZAKI I OSUKA A
Citation
S. Shinoda et al., ENERGY AND ELECTRON-TRANSFER PROPERTIES OF METHYL PHEOPHORBIDE-A IN ZINC PORPHYRIN PHEOPHORBIDE DYADS, Tetrahedron, 53(40), 1997, pp. 13657-13666
Citations number
21
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
53
Issue
40
Year of publication
1997
Pages
13657 - 13666
Database
ISI
SICI code
0040-4020(1997)53:40<13657:EAEPOM>2.0.ZU;2-A
Abstract
A series of ortho-, meta- and para-substituted zinc porphyrin-pheophor bide dyads were synthesized directly from methyl pheophorbide-alpha by trans-esterification of beta-keto methyl ester with hydroxymethyl sub stituted porphyrins. Quantitative energy transfer occurred from the ex cited zinc porphyrin to the pheophorbide. The excited state of the phe ophorbide was quenched by an electron transfer reaction front the zinc porphyrin that was found to depend both on the distance between chrom ophores and the polarity of solvent. (C) 1997 Elsevier Science Ltd.