Study for luminescence performance of three methyl xanthine derivatives

被引：14

作者：

Wei, YL ^{[1
]}

Dong, C ^{[1
]}

Shuang, SM ^{[1
]}

Liu, DS ^{[1
]}

机构：

[1] Shanxi Univ, Inst Chem & Chem Engn, Taiyuan 030006, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2005年 / 61卷 / 11-12期

基金：

中国国家自然科学基金;

关键词：

paper substrate room-temperature phosphorescence; fluorescence; caffeine; theophylline; theobromine;

D O I：

10.1016/j.saa.2004.09.024

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this paper, the low-temperature phosphorescence (UP), the low-temperature fluorescence (LTF), the paper substrate room-temperature phosphorescence (PS-RTP) and the room fluorescence (RTF) properties of caffeine (CF), theophylline (TP), and theobromine (TB) are investigated and compared, and some rules are found out: their maximal excitation wavelength and emission wavelength are in the range of 270-300 nm and 395-445 nm, respectively. And the PS-RTP characters of lifetime, polarization and quanta yield are also investigated and compared. It is found that their lifetimes of PS-RTP are all in the level of 0.1 s. They belong to long-life phosphorescence and their PS-RTP spectra are incompletely polarized. (c) 2004 Elsevier B.V All rights reserved.

引用

页码：2584 / 2589

页数：6

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