Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Light-harvesting and photocurrent generation by cold electrodes modified with mixed self-assembled monolayers of boron-dipyrrin and ferrocene-porphyrin-fullerene triad
Autore:
Imahori, H; Norieda, H; Yamada, H; Nishimura, Y; Yamazaki, I; Sakata, Y; Fukuzumi, S;
Indirizzi:
Osaka Univ, Japan Sci & Technol Corp, CREST, Grad Sch Engn,Dept Mat & LifeSci, Suita, Osaka 5650871, Japan Osaka Univ Suita Osaka Japan 5650871 LifeSci, Suita, Osaka 5650871, Japan Hokkaido Univ, Grad Sch Engn, Dept Mol Chem, Sapporo, Hokkaido 0608628, Japan Hokkaido Univ Sapporo Hokkaido Japan 0608628 oro, Hokkaido 0608628, Japan Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan Osaka Univ Ibaraki Osaka Japan 5670047 Res, Ibaraki, Osaka 5670047, Japan
Titolo Testata:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
fascicolo: 1, volume: 123, anno: 2001,
pagine: 100 - 110
SICI:
0002-7863(20010110)123:1<100:LAPGBC>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARGE SEPARATION; ARTIFICIAL PHOTOSYNTHESIS; POLYCRYSTALLINE GOLD; CHAIN-LENGTH; THIN-FILMS; ENERGY; SYSTEMS; ARRAYS; PHOTODIMERIZATION; PHOTOCHEMISTRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
83
Recensione:
Indirizzi per estratti:
Indirizzo: Imahori, H Osaka Univ, Japan Sci & Technol Corp, CREST, Grad Sch Engn,DeptMat & LifeSci, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan Osaka Univ 2-2 Yamadaoka Suita Osaka Japan 5650871 50871, Japan
Citazione:
H. Imahori et al., "Light-harvesting and photocurrent generation by cold electrodes modified with mixed self-assembled monolayers of boron-dipyrrin and ferrocene-porphyrin-fullerene triad", J AM CHEM S, 123(1), 2001, pp. 100-110

Abstract

Three different kinds of mixed self-assembled monolayers have been prepared to mimic photosynthetic energy and electron transfer on a gold surface. Pyrene and boron-dipyrrin were chosen as a light-harvesting model. The mixedself-assembled monolayers of pyrene (or boron-dipyrrin) and porphyrin (energy acceptor model) reveal photoinduced singlet-singlet energy transfer from the pyrene (or boron-dipyrrin) to the porphyrin on the gold surface. The boron-dipyrrin has also been combined with a reaction center model, ferrocene-porphyrin-fullerene triad, to construct integrated artificial photosynthetic assemblies on a gold electrode using mixed monolayers of the respective self-assembled unit. The mixed self-assembled monolayers on the gold electrode have established a cascade of photoinduced energy transfer and multistep electron transfer, leading to the production of photocurrent output with the highest quantum yield (50 +/- 8%), based on the adsorbed photons everreported for photocurrent generation at monolayer-modified metal electrodes and across artificial membranes using donor-acceptor linked molecules. The incident photon-to-current efficiency (IPCE) of the photoelectrochemical cell at 510 and 430 nm was determined as 0.6% and 1.6%, respectively. Thus,the present system provides the first example of an artificial photosynthetic system, which not only mimics light-harvesting and charge separation processes in photosynthesis but also acts as an efficient light-to-current converter in molecular devices.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 23:25:18