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arXiv 1803.10491cond-mat.softphysics.chem-ph
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超分子Polymer在水中的加速原子模拟

Accelerated Atomistic Simulations of a Supramolecular Polymer in Water

Davide Bochicchio, Giovanni M. Pavan

摘要:

近年来,全原子分子动力学已被证明是研究超分子聚合物的有效工具。虽然由原子模型提供的高分辨率可以允许对组装结构的深入理解,但是在水溶液中获得这些软组装体的可靠平衡配置仍然是一项具有挑战性的任务,主要是由于原子系统的复杂性和它们平衡所需的长模拟时间。在这里,我们已经测试了两个著名的先进的模拟方法(加速分子动力学和Metadenics)的原子模型的水溶性1,3,5-苯三甲酰胺(BTA)的超分子聚合物,并比较所获得的数据与经典的分子动力学。我们的研究结果表明,这两种技术可以是非常有用的,以加速在溶液中的超分子纤维的平衡。此外,我们证明,以适当的方式结合这两种方法可以利用两者的优点,提供一个平衡的配置的BTA超分子聚合物相比,经典的模拟更快,更可重复的方式。这种方法的通用性表明,后者可以适用于模拟各种超分子聚合物以及不同类型的超分子组装。

英文摘要:

All-atom molecular dynamics has been recently proven a useful tool for the study of supramolecular polymers. While the high resolution offered by the atomistic models may allow for deep comprehension of the assembled structure, obtaining a reliable equilibrated configuration for these soft assemblies in aqueous solution remains a challenging task mainly due to the complexity of the atomistic systems and the long simulation time needed for their equilibration. Here we have tested two well-known advanced simulation methods (Accelerated Molecular Dynamics and Metadynamics) on an atomistic model of water-soluble 1,3,5-benzenetricarboxamide (BTA) supramolecular polymer and have compared the obtained data to classical molecular dynamics. Our results show that both techniques can be very useful to accelerate the equilibration of the supramolecular fiber in solution. Moreover, we demonstrate that combining the two methods in opportune way allows to take advantage of the strong points of both, providing an equilibrated configuration for the BTA supramolecular polymer in a faster and more reproducible way compared to classical simulations. The versatility of this approach suggests that the latter can be adapted to simulate a variety of supramolecular polymers as well as different types of supramolecular assemblies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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