相关实验视频

Updated: Jan 6, 2026

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

用可极化键双极框架建模酸盐化:参数优化和基准测试

Shan-Shan Gao¹, Meng-Yao Bai¹, Xiao-Nan Jiang¹

¹School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, China. qh@lnnu.edu.cn.

Physical chemistry chemical physics : PCCP

|October 30, 2025

概括

一个新的极化相互作用模型 (PBFF) 适用于化酸盐系统. 它准确地捕捉了小集群中的极化和多体效应,为凝聚相模拟提供了基础.

科学领域:

计算化学的计算化学
分子建模分子建模
物理化学物理化学

背景情况:

由于两极分化和多体效应,对水合酸盐物种的准确建模具有挑战性.
基于键中心双极的极化力场 (PBFF) 已经显示出对分子系统的前景.
将PBFF扩展到酸盐-水相互作用需要仔细的参数化和验证.

研究的目的:

将极化力场 (PBFF) 模型扩展到含水酸盐物种.
在这些系统中准确地表示极化和多体效应.
为在凝结阶段中建模含酸盐系统提供基础.

主要方法:

使用高级量子力学参考数据对PBFF模型进行参数化.
配件包括构造能量,酸盐单体的二极极时刻和酸盐-水二极体/三极体的相互作用能量.
与DLPNO-CCSD(T) /CBS基准进行评估.

主要成果:

经过调整的PBFF模型实现了变形能量的0.81 kcal mol-1以下的平方根平均误差,而多体相互作用能量的2.06 kcal mol-1以下.
双极时刻被复制的误差低于0.40德比耶.
该模型在捕捉小水合酸盐集群中的关键相互作用模式方面表现出合理的准确性.

结论:

调整后的PBFF模型在模拟化酸盐系统方面显示出有前途.
它的准确性与现有的极化模型相比,具有较少的静电参数.
需要进一步开发,以改善凝聚相环境中的可转移性和性能.

更多相关视频

Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function

Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function

Published on: April 26, 2024

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

相关概念视频

Molecular Geometry and Dipole Moments

Molecular Geometry and Dipole Moments

The VSEPR theory can be used to determine the electron pair geometries and molecular structures as follows:

Phosphate Buffer

Phosphate Buffer

The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...

Molecular Shape and Polarity

Molecular Shape and Polarity

Dipole Moment of a Molecule

Bond Polarity, Dipole Moment, and Percent Ionic Character

Bond Polarity, Dipole Moment, and Percent Ionic Character

Molecular Models

Molecular Models

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.