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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3743

Title: PHOTOPHYSICS OF LINKED DONOR-ACCEPTOR SYSTEMS - THROUGH-SPACE AND THROUGH-BOND INTERACTIONS
Authors: DESCHRYVER, FC
DECLERCQ, D
DEPAEMELAERE, S
HERMANS, E
ONKELINX, Ann
VERHOEVEN, JW
GELAN, Jan
Issue Date: 1994
Publisher: ELSEVIER SCIENCE SA LAUSANNE
Citation: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 82(1-3). p. 171-179
Abstract: Possible competition between through-sigma-bond and through-space interaction on the one hand and between through-sigma- and through-pi-bond interaction on the other has been studied in flexibly and rigidly linked donor-acceptor systems. In a first part, pyrenyl-substituted donor-acceptor compounds were studied, where a permethylated oligosilane chain acts as a flexible spacer. The possible involvement of a sigma delocalized oligosilane chain in the electron transfer process is studied. Intramolecular electron transfer was observed from a permethylated hexasilane chain towards pyrene in the excited state. Through-space ground-state interactions were observed for the donor-acceptor substituted hexamethyl trisilane chain. In order to study the electron transfer process via through-sigma- and through-pi-bond interactions, rigid trichromophoric compounds in an A1-D-A2 configuration were studied. One of the acceptors is directly bound to the donor moiety, while the other acceptor is separated from the donor by a rigid spacer of three sigma bonds. The study of these compounds by means of absorption, stationary and time-resolved emission spectroscopy reveals a competition between the two possible electron transfer directions in one of the trichromophoric compounds.
Notes: LIMBURGS UNIV CENTRUM,DEPT SBM,B-3590 DIEPENBEEK,BELGIUM. UNIV AMSTERDAM,ORGAN CHEM LAB,1018 WS AMSTERDAM,NETHERLANDS.DESCHRYVER, FC, KATHOLIEKE UNIV LEUVEN,MOLEC DYNAM & SPECTROSCOPY LAB,CELESTIJNENLAAN 200E,B-2001 HEVERLEE,BELGIUM.
URI: http://hdl.handle.net/1942/3743
ISI #: A1994PF13000018
ISSN: 1010-6030
Type: Journal Contribution
Appears in Collections: Research publications

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