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通过使用增强的采样模拟,阐明了在高分子树脂[4]arene中基质封装的机制

Tanish Tyagi¹, Anmol¹, Tarak Karmakar¹

¹Department of chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India. tkarmakar@chemistry.iitd.ac.in.

Physical chemistry chemical physics : PCCP

|August 8, 2025

概括

超分子通过水通道可逆地与基质结合,其释放和吸收的能量障碍较低. 这种机制有助于设计可调节的超分子催化剂.

科学领域:

超分子化学超分子化学
催化剂是一种催化剂.
计算化学计算化学

背景情况:

超分子,特别是基于树脂素[4]的,显示出作为类似酶的催化剂的希望.
了解基质结合和释放对于优化其催化性能至关重要.
这些子中基质交换的详细机制尚不清楚.

研究的目的:

为了阐明在resorcin[4]arene超分子中基质封装和解封的机制.
为了研究非共价相互作用和水的可访问性在基质交换中的作用.
为了确定支配基质吸收和释放的自由能源格局.

主要方法:

使用基于飞行概率的增强采样模拟.
进行了原子和动态模拟来观察基质-子相互作用.
进行了免费能源计算,以量化封装和解封的能源障碍.

主要成果:

基质交换通过超分子的水可访问区域发生.
过渡性破坏键促进了基质的运动.
计算出了低能量的障碍物:5.0 ± 1.0 kcal mol−1用于解封和1.5 ± 1.0 kcal mol−1用于封装.
在子和溶液之间很容易交换基质.

结论:

这项研究揭示了在resorcin[4]arene中基质吸收和释放的原子和动态机制.
这些发现凸显了水道和键动态的重要性.
洞察力将指导更高效和可调节的超分子催化剂的合理设计.

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