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Electron transfer over two porphyrins in linear porphyrin arrays

✍ Scribed by Atsuhiro Osuka; Shinji Marumo; Seiji Taniguchi; Tadashi Okada; Noboru Mataga

Book ID: 103033196
Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 438 KB
Volume: 230
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01122-2

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✦ Synopsis

Using pyromellitimide-linked, linear, 1,4-phenylene-bridged di-or tri-porphyrins, the intramolecular electron-transfer reaction from the singlet excited state of the distal doubly strapped free-base porphyrin to the pyromellitimide acceptor was studied by means of picosecond time-resolved fluorescence and transient absorption spectroscopy. The electron transfer is more effective in magnesium-porphyrin bridged models than in zinc-porphyrin bridged ones. Remarkably, the electron transfer over two porphyrins proceeds with rates almost similar to that of electron transfer over one porphyrin regardless ofthe bridging metal porphyrin.

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