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密度泛函方法研究噻唑橙类菁染料的光谱性质

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Indexed by:期刊论文

Date of Publication:2017-12-10

Journal:应用化学

Included Journals:CSCD

Volume:34

Issue:12

Page Number:1474-1480

ISSN No.:1000-0518

Key Words:密度泛函方法;噻唑橙类染料;几何优化;光谱计算;势能曲线

Abstract:4-(二乙基氨基)丁基取代的三甲川噻唑橙(DEAB-TO3)具有极低的本底荧光可用于核酸检测.本文运用密度泛函理论研究了4-(二乙基氨基)丁基取代的一甲川噻唑橙(DEAB-TO1)和DEAB-TO3光谱性质.基态和激发态几何优化显示激发态构型高度扭曲;光谱计算和轨道分析得出第一激发态是暗态,出现了扭曲的分子内电荷转移;势能曲线计算可知,DEAB-TO1和DEAB-TO3有着极低的能隙和旋转能垒.以上结果解释了本底荧光极弱的实验现象.

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