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Study for Luminescence Performance of Three Methyl Xanthine Derivatives by Yan-Li Wei; Chuan Dong; Shao-Min Shuang; Dian-Sheng Liu is a Chemistry article available to read on EtoBox.

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In this paper, the low-temperature phosphorescence (LTP), 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 0.1s. They belong to long-life phosphorescence and their PS-RTP spectra are incompletely polarized.

Who reads Study for Luminescence Performance of Three Methyl Xanthine Derivatives?

Author

Yan-Li Wei; Chuan Dong; Shao-Min Shuang; Dian-Sheng Liu

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Pergamon Press Ltd.; Elsevier BV (ISSN 1386-1425)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)