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相关概念视频

Mass Spectrometry: Molecular Fragmentation Overview01:20

Mass Spectrometry: Molecular Fragmentation Overview

5.3K
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
5.3K
Mass Spectrometry: Cycloalkene Fragmentation00:54

Mass Spectrometry: Cycloalkene Fragmentation

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The molecular ions of cycloalkenes undergo fragmentation via a retro-Diels–Alder reaction.
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相关实验视频

Updated: Jan 8, 2026

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

Published on: April 12, 2019

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Fragmet:基于碎片化的多尺度量子化学的一个开源框架.

Dustin R Broderick1, Paige E Bowling1,2, Chance Brandt1

  • 1Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio USA.

Wiley interdisciplinary reviews. Computational molecular science
|December 15, 2025
PubMed
概括
此摘要是机器生成的。

基于碎片的量子化学通过将它们分成更小的部分来简化复杂的计算. 新的开源软件Fragmet通过管理片段交互和提高计算效率来促进这一点.

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相关实验视频

Last Updated: Jan 8, 2026

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

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Achieving Efficient Fragment Screening at XChem Facility at Diamond Light Source
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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
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科学领域:

  • 计算化学计算化学
  • 量子化学 是一个量子化学.
  • 软件开发 软件开发

背景情况:

  • 传统的电子结构计算面临着计算规模化的挑战.
  • 基于碎片的方法通过将大型系统分成较小的子系统提供解决方案.
  • 量子化学代码之间的互操作性对于这些方法至关重要.

研究的目的:

  • 介绍"Fragmet",这是一个基于碎片的量子化学的开源软件.
  • 为社区验证和开发新的近似提供一个工具.
  • 能够分析大型分子系统中的多体相互作用.

主要方法:

  • 开发了用于自动碎片生成和结构修改的算法.
  • 实施基于距离和能源的选,以进行子系统选择.
  • 集成检查点,数据库管理和并行化使用Python,SQLite和Ray.

主要成果:

  • 在超过1000个处理器上,Fragmet表现出高并行效率 (~96%) .
  • 该软件有效地处理工作站硬件上的大规模蛋白质碎片.
  • 为众多量子化学引擎 (Q-Chem,PySCF,xTB等) 提供接口. ) 的情况.

结论:

  • Fragmet解决了在基于碎片的计算中需要专门的软件的需求.
  • 该应用程序促进社区验证和开发新的近似方法.
  • 为复杂的量子化学计算提供了一个用户友好的框架.