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Titolo:
MOLECULAR ELECTRONIC-PROPERTIES OF FUSED RIGID PORPHYRIN-OLIGOMER MOLECULAR WIRES
Autore:
REIMERS JR; LU TX; CROSSLEY MJ; HUSH NS;
Indirizzi:
UNIV SYDNEY,DEPT PHYS & THEORET CHEM SYDNEY NSW 2006 AUSTRALIA UNIV SYDNEY,DEPT ORGAN CHEM SYDNEY NSW 2006 AUSTRALIA UNIV SYDNEY,DEPT BIOCHEM SYDNEY NSW 2006 AUSTRALIA
Titolo Testata:
Nanotechnology
fascicolo: 4, volume: 7, anno: 1996,
pagine: 424 - 429
SICI:
0957-4484(1996)7:4<424:MEOFRP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
BROOKER POLYMETHINECYANINE CATIONS; NEGATIVE-DEFECT TRANSPOLYACETYLENE; CHARGE-DENSITY-WAVE; ALPHA,OMEGA-DIPYRIDYL TRANS-POLYENES; TIGHT-BINDING LINKAGES; ASYMPTOTIC BAND-GAP; BRIDGED SYSTEMS; ENERGY-TRANSFER; BIS(PENTAAMMINERUTHENIUM) COMPLEXES; DISTANCE DEPENDENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
J.R. Reimers et al., "MOLECULAR ELECTRONIC-PROPERTIES OF FUSED RIGID PORPHYRIN-OLIGOMER MOLECULAR WIRES", Nanotechnology, 7(4), 1996, pp. 424-429

Abstract

Porphyrin-derived materials may be linked together by fusion to rigidcoplanar aromatic bridges such as substituted anthracenes to form linear or branched oligomers. Here, we consider linear oligomers of free-base porphin and meso-tetra-aryl derivatives, such as the tetramer synthesized by Crossley and Burn. A number of semi-empirical quantum-chemical methods have been used to determine the geometries and electronicstructures of the ground and excited electronic states. The inter-ring coupling responsible for electron or hole conduction is discussed asa function of oligomer size and the predicted molecular-wire characteristics outlined. Comparison with properties of other linear molecularwires are summarized, and possibilities of introducing switching capacity are indicated. The edge-to-edge length of the tetramer is about 56 Angstrom, sufficient for trans-membrane spanning; this length may bee.g. doubled in one synthetic step, producing an octamer of length about 120 Angstrom, sufficient for electrode spanning.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 18:30:59