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Titolo:
PHOTOPHYSICS OF LINKED DONOR-ACCEPTOR SYSTEMS - THROUGH-SPACE AND THROUGH-BOND INTERACTIONS
Autore:
DESCHRYVER FC; DECLERCQ D; DEPAEMELAERE S; HERMANS E; ONKELINX A; VERHOEVEN JW; GELAN J;
Indirizzi:
KATHOLIEKE UNIV LEUVEN,MOLEC DYNAM & SPECTROSCOPY LAB,CELESTIJNENLAAN200E B-2001 HEVERLEE BELGIUM LIMBURGS UNIV CENTRUM,DEPT SBM B-3590 DIEPENBEEK BELGIUM UNIV AMSTERDAM,ORGAN CHEM LAB 1018 WS AMSTERDAM NETHERLANDS
Titolo Testata:
Journal of photochemistry and photobiology. A, Chemistry
fascicolo: 1-3, volume: 82, anno: 1994,
pagine: 171 - 179
SICI:
1010-6030(1994)82:1-3<171:POLDS->2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOINDUCED CHARGE SEPARATION; EXCIPLEX FORMATION; DUAL FLUORESCENCE; SOLVENT POLARITY; TRANSFER STATES; EXCITED-STATES; TICT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
F.C. Deschryver et al., "PHOTOPHYSICS OF LINKED DONOR-ACCEPTOR SYSTEMS - THROUGH-SPACE AND THROUGH-BOND INTERACTIONS", Journal of photochemistry and photobiology. A, Chemistry, 82(1-3), 1994, pp. 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 transferprocess 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 04:06:49