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Aritra Das¹, Ashwini Danao², Shubhojit Banerjee³

¹Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India.

Journal of the American Chemical Society

|January 20, 2021

概括

炭 (AN) 与八酸形成独特的复合物,导致排泄物排放. 这项研究揭示了取决于时间的排放最大值,这表明受限下的中间状态.

科学领域:

超分子化学
摄影化学
物理化学

背景情况:

激发的炭化物通常是光二聚变的,在溶剂中不表现出排泄物.
炭 (AN) 与水中的八酸形成了2:1和2:2的宿主-客群.

研究的目的:

为了研究超分子宿主-客体内的炭的兴奋状态行为.
了解监禁对分子光物理学的影响.

主要方法:

核磁共振 (NMR) 用于复杂化确认.
分子动力学 (MD) 模拟用于结构探测.
超快速的时间分辨率光谱,用于激发状态的动态.
量子化学计算 (QM/MM-TDDFT) 用于激发状态的表面映射.

主要成果:

2:2复合体表现出强烈的排放,而2:1复合体仅表现出单体排放.
时间解决的排放实验揭示了独特的,时间依赖的排放量最大值.
观察到至少一种介于单体和异构体状态之间的证据.
计算的潜在能量曲线支持拟议的中间模型.

结论:

在宿主-客人复合体内的分子限制极大地改变了的兴奋状态行为.
观察到的依赖时间的排放是一种在同位素溶液中未见的新现象.
这些发现对理解有限的生物系统中的分子行为有意义.

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