Evidence of tautomerism in 2-aminopurine from fluorescence lifetime measurements

被引：45

作者：

Neely, RK

Magennis, SW

Dryden, DTF

Jones, AC

机构：

[1] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, COSMIC, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 45期

关键词：

D O I：

10.1021/jp0490857

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：

The fluorescence decay characteristics of 2-aminopurine (2AP) and 2-aminopurine riboside (2APr) have been investigated as a function of excitation and emission wavelength in aqueous and ethanolic solutions. Global analysis of the decay data shows that 2AP exists as two emitting species, whereas 2APr exists as a single species. This is attributed to 9H/7H tautomerism of 2AP. The proportion of 7H tautomer is estimated to be 20% in ethanol and 40% in water.

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页码：17606 / 17610

页数：5

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