Fluorescence of matrix isolated guanine and 7-methylguanine.
Fluorescence of matrix isolated guanine and 7-methylguanine.
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基质分离鸟嘌呤和 7-甲基鸟嘌呤的荧光。
DOI:
10.1016/1011-1344(94)07018-0
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发表时间:
1994
期刊:
影响因子:
--
通讯作者:
Sutherland,JC
中科院分区:
文献类型:
--
作者:
Polewski,K;Zinger,D;Trunk,J;Monteleone,DC;Sutherland,JC
We have prepared argon and nitrogen matrices containing guanine and 7-methylguanine, and measured their absorption, fluorescence excitation and fluorescence emission spectra. The fluorescence excitation spectrum of guanine shows four well-resolved bands in the range from 170 to 290 nm; excitation at the wavelengths of each of these bands results in a fluorescence emission with maximum intensity near 350 nm and a single-exponential decay with a lifetime of about 10 ns. There are significant differences between the fluorescent excitation and emission spectra of guanine and of 7-methylguanine, suggesting that the fluorescence observed from the guanine sample does not arise from a minority tautomer.
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