氯化胆碱
带隙
乙二醇
化学
溴化物
氢键
咪唑
无机化学
材料科学
有机化学
分子
光电子学
作者
Alberto Mannu,Maria Enrica Di Pietro,Andrea Mele
出处
期刊:Molecules
[MDPI AG]
日期:2020-03-25
卷期号:25 (7): 1495-1495
被引量:15
标识
DOI:10.3390/molecules25071495
摘要
UV–VIS spectroscopy analysis of six mixtures containing choline chloride or triphenylmethylphosphonium bromide as the hydrogen bond acceptor (HBA) and different hydrogen bond donors (HBDs, nickel sulphate, imidazole, d-glucose, ethylene glycol, and glycerol) allowed to determine the indirect and direct band-gap energies through the Tauc plot method. Band-gap energies were compared to those relative to known choline chloride-containing deep band-gap systems. The measurements reported here confirmed the tendency of alcohols or Lewis acids to increment band-gap energy when employed as HBDs. Indirect band-gap energy of 3.74 eV was obtained in the case of the triphenylmethylphosphonium bromide/ethylene glycol system, which represents the smallest transition energy ever reported to date for such kind of systems.
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