Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
PHOTOINDUCED CHARGE SEPARATION - DIPOLES, EXCIPLEXES AND ION-PAIRS
Autore:
SMIRNOV S; BRAUN C; ANKNERMYLON S; GRZESKOWIAK K; GREENFIELD S; WASIELEWSKI M;
Indirizzi:
DARTMOUTH COLL,DEPT CHEM HANOVER NH 03755 ARGONNE NATL LAB,DIV CHEM ARGONNE IL 60439
Titolo Testata:
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
, volume: 283, anno: 1996,
pagine: 243 - 248
SICI:
1058-725X(1996)283:<243:PCS-DE>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROWAVE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
7
Recensione:
Indirizzi per estratti:
Citazione:
S. Smirnov et al., "PHOTOINDUCED CHARGE SEPARATION - DIPOLES, EXCIPLEXES AND ION-PAIRS", Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 283, 1996, pp. 243-248

Abstract

Depending on the system, the extent of photoinduced charge separationvaries from intramolecular to intermolecular and further to ion-radical pairs of arbitrary separation. Transient de conductivity techniquesallow study of all these stages in photoinduced charge separation with subnanosecond time resolution. In the simplest case, photoexcitationof a molecule can result in intramolecular charge transfer, i.e. the creation of an excited state dipole moment, which exists only until the molecule relaxes to the ground state. In the case of an intermolecular charge transfer, there is a nonzero probability for the charges to dissociate and create free ion radicals. The larger the initial chargeseparation the greater is their probability of dissociation. The probability increases even more in the case of photoionization where the photoelectron thermalizes at a distance from the parent cation, creating the so called geminate ion radical pair.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 12:42:19