| 查看: 575 | 回复: 0 | |||
[求助]
重金属配合物的量化计算方法实现交流
|
|
4f电子计算收敛还是比较困难的,最近想挑战一下稀土配合物的量化计算。阅读了大量的量化文献。其中有一篇最为经典,为了在Gaussian中复现该文献内容,想跟大家做个交流。 Inorganic Chemistry, 38,6 1999 其中描述了有机物与稀土离子间的作用,其中量化计算的方法描述为: The QM ab initio calculations were performed at the HF level using the Gaussian-94 package.52 The 46 + 4fn core electrons of the lanthanide cations were described by the quasi relativistic pseudopotential of Dolg et al.,53,54 and and the valence electrons, by a (7s,6p,5d)/[5s,4p,3d] Gaussian basis set supplemented by one f polarization function of exponent 0.591 as optimized for La by Frenking et al.55 This exponent was kept for the whole series of lanthanides. Calculations on the Eu3+‚‚‚OPH3 system, using a smaller core of 28 electrons for the pseudopotential (i.e. including the 4s, 4p, 4d, and 4f electrons in the valence space), showed that the use of a large core pseudopotential for our purpose is satisfactory. The H, C, N, O, and P atoms were described by the standard Dunning-Hay double-zeta basis set 57 adding one 3d polarization function on the P atom of exponent zeta3d= 0.37 (referred to hereafter as “DZ” basis set). In some additional test calculations, polarization functions on the atoms of L were also added (exponents being zeta3dC= 0.75, zeta3dO= 0.85, zeta3dN= 0.80, and zeta2pH= 0.80), leading to the DZ* basis set. 那么,为了实现这一过程,我想可以通过混合基组来实现。查阅了相应的基组用户手册, 文献说HCNOP用Dunning-Hay double-zeta basis set。对应的关键词是D95V或者D95加入极化函数,应该为D95V*或者D95。这个没什么问题。 对于4f金属离子用quasi relativistic pseudopotential方法,属于SDD基组,那么对于小核赝势为MWB28,对于大核赝势为MWB46~60(分别La~Lu)。但是根据文献描述的说采用了 (7s,6p,5d)/[5s,4p,3d] Gaussian basis set supplemented by one f polarization function of exponent 0.591。那么这部分的基组该如何描述呢? 谢谢大家! |
» 猜你喜欢
哈工大深圳 表界面物理化学方向(胶体与界面,光谱探测研究) 博士招生
已经有0人回复
元素硫的化合价和氧化态
已经有1人回复
物理化学论文润色/翻译怎么收费?
已经有219人回复
江苏科技大学2026年招聘启事
已经有1人回复
Comsol 6.0 桶内肥料产热产湿过程模拟求助
已经有1人回复
International Journal of Nanoscience属于中科院4区吗?
已经有0人回复
澳大利亚南昆士兰大学量子点课题组招收博士生
已经有0人回复
香港中文大学(深圳)2026年招聘公告
已经有0人回复
大湾区大学刘天辉课题组招收2027级博士生(与中山大学物理学院联合培养)
已经有77人回复
【接测试】TPD-TPR、TPO、脉冲吸附、原位红外,电化学原位红外,站内联系
已经有0人回复
北京工业大学2026年公开招聘公告
已经有0人回复










回复此楼