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Titolo:
DEFECT ELECTRONIC STATES IN BETA-CAROTENE AND LOWER HOMOLOGS
Autore:
VALLADARES RM; HAYES W; FISHER AJ; STONEHAM AM;
Indirizzi:
UNIV OXFORD,CLARENDON LAB,PARKS RD OXFORD ENGLAND AEA IND TECHNOL,HARWELL LAB DIDCOT OX11 0RA OXON ENGLAND
Titolo Testata:
Journal of physics. Condensed matter
fascicolo: 38, volume: 5, anno: 1993,
pagine: 7049 - 7062
SICI:
0953-8984(1993)5:38<7049:DESIBA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
BU EXCITED-STATE; CONDUCTING POLYMERS; POLYACETYLENE; SOLITONS; RELAXATION; POLYENES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
R.M. Valladares et al., "DEFECT ELECTRONIC STATES IN BETA-CAROTENE AND LOWER HOMOLOGS", Journal of physics. Condensed matter, 5(38), 1993, pp. 7049-7062

Abstract

We present semi-empirical calculations of the atomic geometries and electronic charge distributions of beta-carotene homologues of different chain lengths. We find defects in charged and photoexcited chains that are similar to the defects found in the degenerate polymer trans-polyacetylene, and we show how confinement affects these defects as the chains we shortened. Our results exhibit a generalized form of charge-conjugation symmetry in which the properties of a negatively charged defect are related to those of a positive one and vice versa.

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Documento generato il 02/12/20 alle ore 15:02:30