Irregular behavior of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin in Langmuir-Blodgett films

被引：14

作者：

Efimov, AV

Anikin, M

Tkachenko, NV

Mironov, AF

Lemmetyinen, H

机构：

[1] MV Lomonosov State Acad Fine Chem Technol, Moscow 117571, Russia

[2] Tampere Univ Technol, Inst Mat Chem, FIN-33101 Tampere, Finland

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 289卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(98)00453-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multilayer Langmuir-Blodgett films containing 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin (PFP) in octadecylamine and in fatty acid matrices were prepared. The films revealed relatively long fluorescence lifetimes with an irregular concentration dependence: the longer lifetime corresponded to the higher concentration of PFP. Fluorescence decay-associated spectra indicated that energy migration contributed to the relaxation of the singlet excited state at all concentrations studied. In comparison with solutions, the absorption spectra of the films revealed a distinct band narrowing and an increase in molar extinction of the Soret band. Presumably, PFP formed unusually uniform structures, a kind of highly ordered aggregates, in the plane of monolayers. (C) 1998 Elsevier Science B.V. All rights reserved.

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页码：572 / 578

页数：7

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