PROTON-ASSISTED PHOTOINDUCED ELECTRON-TRANSFER FROM PORPHYRIN TO QUINONE - A PHOTO-CIDNP AND LASER FLASH-PHOTOLYSIS STUDY

被引：19

作者：

GUST, D ^{[1
]}

MOORE, TA ^{[1
]}

MOORE, AL ^{[1
]}

MA, XCC ^{[1
]}

NIEMAN, RA ^{[1
]}

SEELY, GR ^{[1
]}

BELFORD, RE ^{[1
]}

LEWIS, JE ^{[1
]}

机构：

[1] ARIZONA STATE UNIV,CTR STUDY EARLY EVENTS PHOTOSYNTH,TEMPE,AZ 85287

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 11期

关键词：

D O I：

10.1021/j100164a052

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The mechanism of proton-assisted photoinduced electron transfer from porphyrins to quinones has been investigated by a combination of NMR, photo-CIDNP, laser flash photolysis, and UV-vis absorption techniques. In aromatic solvents containing trifluoroacetic acid, the electron-donor species was found to be the triplet state of the porphyrin dication rather than that of the free-base porphyrin itself. In addition, reaction of the porphyrin dication triplet state with the protonated quinone species QH+, rather than Q, was found to be responsible for the observed electron transfer and the resulting CIDNP signals.

引用

页码：4442 / 4445

页数：4

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