Intramolecular Hydrogen-Bonding Effects on the Fluorescence of PRODAN Derivatives
作者:Isaac G. Alty、Douglas W. Cheek、Tao Chen、David B. Smith、Emma Q. Walhout、Christopher J. Abelt
DOI:10.1021/acs.jpca.6b02398
日期:2016.5.26
This behavior is attributed to decreased efficiency in intersystem crossing due to an increase in the energy of the n → π* triplet state. The intramolecular H bond does not induce quenching in acetonitrile; however, in the presence of a very small concentration of methanol, a dual intramolecular, intermolecular H-bonding arrangement does lead to partial quenching as revealed by preferential solvation
报道了分子内氢键对6-丙酰基-2-二甲基氨基萘的三种衍生物的荧光行为的影响。通过与相应的参考化合物的比较揭示了H键作用,在参考化合物中,将给H键的羟基替换为甲氧基。在甲苯中,分子内的H键使荧光强度显着增加,但位置仅发生轻微的红移。此行为归因于由于n→π*三重态的能量增加而导致的系统间交叉效率降低。分子内的H键不会在乙腈中引起淬灭;但是,在甲醇浓度非常低的情况下,双分子内