ABSORPTION-SPECTRA AND DYNAMICS OF THE TRIPLET-STATE IN PARA-TERPHENYL POWDER SYSTEMS - A DIFFUSE REFLECTANCE LASER PHOTOLYSIS STUDY

被引：22

作者：

KOSHIOKA, M

MIZUMA, H

IMAGI, K

IKEDA, N

FUKUMURA, H

MASUHARA, H

KRYSCHI, C

机构：

[1] KYOTO INST TECHNOL, DEPT POLYMER SCI & ENGN, KYOTO 606, JAPAN

[2] UNIV DUSSELDORF, LEHRSTUH FESTKORPERSPEKTROSKOPIE, INST PHYS KONDENSIERTEN MAT, W-4000 DUSSELDORF 1, GERMANY

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1990年 / 63卷 / 12期

关键词：

D O I：

10.1246/bcsj.63.3495

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A microcomputer-controlled nanosecond diffuse reflectance laser photolysis system was developed and applied to p-terphenyl powder systems. The triplet absorption spectrum of microcrystalline powders is broader and red-shifted compared to the molecular triplet state in solution. Possible contributions of an optical artifact and an impurity were rejected by examining powder systems doped with naphthacene and diluted with NaCl as well as poly(methyl methacrylate). p-Terphenyl adsorbed on silica gel and included in beta-cyclodextrin gave different triplet spectra, which are interperted in terms of conformational structure of p-terphenyl. Decay processes and an oxygen effect are also discussed.

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页码：3495 / 3501

页数：7

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