INFLUENCE OF PORE-SIZE ON THE INTENSITY OF THE MONOMER AND EXCIMER-LIKE FLUORESCENCE OF PYRENE ADSORBED ONTO POROUS GLASSES

被引：8

作者：

FUJII, T ^{[1
]}

ISHII, A ^{[1
]}

TAKUSAGAWA, N ^{[1
]}

YAMASHITA, H ^{[1
]}

ANPO, M ^{[1
]}

机构：

[1] UNIV OSAKA PREFECTURE,COLL ENGN,DEPT APPL CHEM,SAKAI,OSAKA 593,JAPAN

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1995年 / 86卷 / 1-3期

关键词：

FLUORESCENCE; PHOTOPHYSICAL PROCESS; PYRENE; ADSORPTION; POROUS GLASS; PORE DIAMETER;

D O I：

10.1016/1010-6030(94)03947-S

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：

The influence of the pore size of calcinated (773 K) porous glasses (average pore diameters, 40, 80 and 300 Angstrom) on the ratio R of the emission intensity of the excimer-like fluorescence to that of the monomer fluorescence of pyrene adsorbed on porous glass was examined. R decreased with increasing pore size. The results were interpreted on the basis of the photophysical processes of adsorbed pyrene molecules on the surfaces. The ratio of the quantum efficiency for excimer formation from excited dimeric pyrene was estimated to be 1:0.23:0.11 for PG40, PG80 and PG300. The fractal nature of the surfaces of the individual porous glasses played an important role in the photophysical processes of pyrene encapsulated in the pores.

引用

页码：219 / 224

页数：6

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