Study for luminescence performance of three methyl xanthine derivatives.
Spectrochim Acta A Mol Biomol Spectrosc
; 61(11-12): 2584-9, 2005 Sep.
Article
en En
| MEDLINE
| ID: mdl-16043051
ABSTRACT
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.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Xantinas
Idioma:
En
Revista:
Spectrochim Acta A Mol Biomol Spectrosc
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2005
Tipo del documento:
Article