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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,SCH CHEM SYDNEY NSW 2006 AUSTRALIA UNIV SYDNEY,DEPT BIOCHEM SYDNEY NSW 2006 AUSTRALIA
Titolo Testata:
Chemical physics letters
fascicolo: 4-5, volume: 256, anno: 1996,
pagine: 353 - 359
SICI:
0009-2614(1996)256:4-5<353: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
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
J.R. Reimers et al., "MOLECULAR ELECTRONIC-PROPERTIES OF FUSED RIGID PORPHYRIN-OLIGOMER MOLECULAR WIRES", Chemical physics letters, 256(4-5), 1996, pp. 353-359

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 porphyrin and meso-tetra-aryl derivatives, such as the tetramer. Previously, a number of semi-empirical quantum-chemical methods have been used to determine the geometries and electronic structures of the ground and excited electronic states. Here, the inter-ring coupling responsible for electron or hole conduction is discussed as a function of oligomer size and the predicted molecular-wire characteristics outlined. Comparisons with properties of other linear molecular wires are summarized, and possibilities of introducing switching capacity are indicated. It should be noted that the edge-to-edge length of the tetramer is ca, 56 Angstrom, sufficient for trans-membrane spanning, while the length of the octamer, ca. 110 Angstrom, is sufficient for nano-electrode spanning.

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Documento generato il 26/09/20 alle ore 13:55:03