NEW SPECTROSCOPIC EVIDENCE FOR MOLECULAR AGGREGATES OF RHODAMINE 6G IN AQUEOUS-SOLUTION AT HIGH-PRESSURE

被引：53

作者：

TAGUCHI, T ^{[1
]}

HIRAYAMA, S ^{[1
]}

OKAMOTO, M ^{[1
]}

机构：

[1] KYOTO INST TECHNOL,FAC ENGN & DESIGN,SAKYO KU,KYOTO 606,JAPAN

来源：

CHEMICAL PHYSICS LETTERS | 1994年 / 231卷 / 4-6期

关键词：

D O I：

10.1016/0009-2614(94)01274-1

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：

Molecular aggregates of rhodamine 6G in aqueous solutions were studied by the measurement of absorption and fluorescence emission spectra, as well as fluorescence decay curves, all as a function of pressure. In moderately concentrated solutions (less than or equal to 7X10(-4) M), the fluorescence spectra revealed that the dimer was nonfluorescent up to 900 MPa. In more concentrated solutions (greater than or equal to 3X10(-3) M), a new absorption peak located at 477 nm, which was assigned to higher aggregates other than the dimer, was observed at high pressures. These higher aggregates were found to fluoresce with a new emission peak located at 650 nm. The photophysical properties of the higher aggregates are discussed.

引用

页码：561 / 568

页数：8

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