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Titolo:
Excited-state dynamics of 5,10,15,20-tetraphenyl-21H,23H-porphine manganese(III) chloride encapsulated in TiMCM-41 and MCM-41; Proved by fs-diffuse reflectance laser photolysis
Autore:
Kim, Y; Choi, JR; Yoon, M; Furube, A; Asahi, T; Masuhara, H;
Indirizzi:
Chungnam Natl Univ, Dept Chem, Taejon 305764, South Korea Chungnam Natl Univ Taejon South Korea 305764 Taejon 305764, South Korea Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan Osaka Univ Suita Osaka Japan 5650871 pl Phys, Suita, Osaka 5650871, Japan
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 36, volume: 105, anno: 2001,
pagine: 8513 - 8518
SICI:
1520-6106(20010913)105:36<8513:EDO5M>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRON-TRANSFER; PHOTOCATALYTIC DEGRADATION; SPECTRAL SENSITIZATION; WATER-PURIFICATION; TITANIUM-DIOXIDE; VISIBLE-LIGHT; TIO2; OXIDATION; SYSTEMS; PHOTOIONIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Yoon, M Chungnam Natl Univ, Dept Chem, Taejon 305764, South Korea ChungnamNatl Univ Taejon South Korea 305764 305764, South Korea
Citazione:
Y. Kim et al., "Excited-state dynamics of 5,10,15,20-tetraphenyl-21H,23H-porphine manganese(III) chloride encapsulated in TiMCM-41 and MCM-41; Proved by fs-diffuse reflectance laser photolysis", J PHYS CH B, 105(36), 2001, pp. 8513-8518

Abstract

5,10,15,20-Tetraphenyl-21H,23H-porphine manganese(III) chloride ((MnTPP)-T-III(Cl)) was encapsulated into MCM-41 and TiMCM-41, and its photoinduced electron transfer had been studied by using femtosecond diffuse reflectance photolysis. Two different transient species (c.a. 10 ps and c.a. 80 ps) were observed. The shorter-lived species should be originated from relaxation of a "tripmultiplet" state and the longer-lived species should be attributed to the spin-forbidden relaxation (slower than the spin-allowed decay of triptquintet) via a quintet CT state. After irradiation, MnTPPCI+. radicals are detected in MCM-41 or TiMCM-41, indicating that the mesoporous silicateframework plays a good electron acceptor. Furthermore, it has been found that the formation MnTPPCI+. is easier in TiMCM-41 than in MCM-41, indicating that framework modification by incorporating the Ti4+ into the MCM-41 enhances the electron-accepting ability of the MCM-41 framework.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 00:42:14