选择你的水平明智:评估密度函数和分散纠正金属碳烯化合物
Vinícius Glitz1, Vinícius Capriles Port1, Ebbe Nordlander2
1Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Brazil.
我们对金属碳烯基基的54种计算方法进行了基准测试. TPSSh ((D3zero) 和r2SCAN ((D3BJ,D4) 函数为预测结构和属性提供了最佳的准确性和效率.
科学领域:
- 计算化学的计算化学
- 量子化学 是一个量子化学.
- 材料科学 材料科学 材料科学
背景情况:
- 准确的金属连接体复合体建模对于催化,材料科学和生物化学的应用至关重要.
- 金属碳基,其多样化的结构和电子特性,是重要的模型系统.
- 需要可靠的计算方法来预测它们的结构和振动特性.
研究的目的:
- 为了对十七个密度函数进行基准测试,将它们与金属碳烯的三个分散方案相结合.
- 评估54种计算方法在复制几何形状,结构参数和CO拉伸频率方面的准确性.
- 确定研究 (I) 和 (I) 碳的最准确和最有效的方法.
主要方法:
- 54种计算方法的系统评估,包括17种密度函数和3种分散校正 (D3zero,D3BJ,D4) 在CCDC的34个MnI和ReI碳基上.
- 评估几何形状,结构参数和CO拉伸频率.
- 相对电子能量与高级DLPNO-CCSD计算的比较和计算成本的分析.
主要成果:
- 混合元-GGA和元-GGA功能表现出卓越的性能.
- TPSSh ((D3zero) 和r2SCAN ((D3BJ,D4) 被确定为表现最好的方法,平衡准确性和计算效率.
- 这些选择的方法提供了可靠的结构,振动和能量特性,与高级量子化学计算相一致.
结论:
- 密度函数理论 (DFT) 通过适当的功能和分散校正,可以准确地建模金属碳基.
- 推使用TPSSh和r2SCAN函数,特别是D3zero,D3BJ或D4分散的函数,用于研究Mn (I) 和Re (I) 碳基.
- 这些发现有助于选择有效和准确的计算工具,用于催化剂设计和材料开发.
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