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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Anomalous Green Emission and Energy Transfer in the N,N-Dimethylformamide/ Hydrochloric Acid/Europium Chloride System
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Anomalous Green Emission and Energy Transfer in the N,N-Dimethylformamide/ Hydrochloric Acid/Europium Chloride System

机译：N，N-二甲基甲酰胺/盐酸/氯化Euro体系中的异常绿色排放和能量转移

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摘要

The unusual green photoluminescence (PL) of N,N-dimethylformamide (DMF)/hydrochloric acid (HC1)/ europium chloride (EuCl_3) solutions discovered earlier was investigated in more detail to clarify the emission mechanism.It was revealed that the DMF/HCl pair alone can yield a green PL band under UV excitation,and the emission has features of that of excimers.The addition of EuCl_3 salt to the solution further stimulates the green emission.The quantum yield of the line emission of Eu~(3+) ions at 592 and 612 nm is also affected by the presence of HC1 in the solution.Both the green emission band and Eu~(3+) emission lines possess a common channel of excitation at approx280 nm.This channel is the only source for the green emission band and an additional source for the Eu~(3+) emission lines,which can also be stimulated through a conventional Eu~(3+) excitation channel at 394 nm.The common excitation channel was found to be time-dependent,and its excitation maximum gradually shifts to longer wavelengths.Changes in the PL profiles of europium ions were also observed depending on the presence of HC1 and the solution aging.
机译：研究了较早发现的N，N-二甲基甲酰胺（DMF）/盐酸（HCl）/氯化p（EuCl_3）溶液的异常绿色光致发光（PL），以阐明其发射机理，结果表明DMF / HCl单对可在紫外光激发下产生绿色PL带，且发射具有准分子的特征。向溶液中添加EuCl_3盐可进一步激发绿色发射.Eu〜（3+）的线发射的量子产率溶液中HCl的存在也会影响592和612 nm处的离子，绿色发射带和Eu〜（3+）发射线在280 nm处都有一个共同的激发通道，该通道是产生HCl的唯一来源。绿色发射带和Eu〜（3+）发射谱线的附加光源，也可以通过394 nm的常规Eu〜（3+）激发通道进行激发。发现公共激发通道是时间相关的，其激发最大值逐渐变长还观察到of离子的PL曲线变化，这取决于HCl的存在和溶液的老化。

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