Translational Diffusion and Unstable Conformer Trapping in Glassy Isopentane at 77 K
Translational Diffusion and Unstable Conformer Trapping in Glassy Isopentane at 77 K
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77 K 玻璃状异戊烷中的平移扩散和不稳定构象异构体捕获
DOI：
10.1021/acs.jpca.9b07964
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Saltiel, Jack
中科院分区：
文献类型：
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作者：
Zimányi, László;Krishnan, Sumesh B.;Williford, Emily;Gupta, Shipra;Sepulveda, Jonathan;Schwartz, Hadleigh;Mallory, Frank B.;Mallory, Clelia W.;Dmitrenko, Olga;Saltiel, Jack
在异戊烷（IP）玻璃在77 K的扩散淬灭证明在1，3-戊二烯和/或分子氧的存在下，苯并菲的磷光寿命的减少。顺式和反式1，2-二（1-甲基-2-萘基）乙烯在IP玻璃中77 K的荧光光谱和寿命表明顺式→转式异构化导致了反式异构体中不稳定构象的捕获。声称IP在77 K是没有足够的粘性来捕获不稳定的光产物构象是无效的。
Diffusional quenching in isopentane (IP) glass at 77 K is demonstrated by the reduction of triphenylene phosphorescence lifetimes in the presence of 1,3-pentadiene and/or molecular oxygen. Fluorescence spectra and lifetimes ofcis- andtrans-1,2-di(1-methyl-2-naphthyl)ethene in IP glass at 77 K reveal that thecis→transphotoisomerization leads to the trapping of unstable conformers of thetransisomer. The claim that IP at 77 K is not sufficiently viscous to trap unstable photoproduct conformers is invalidated.