标题: 求助:含锕系元素配合物计算论文的提问? [打印本页] 作者Author: wangzh 时间: 2023-3-17 11:05 标题: 求助:含锕系元素配合物计算论文的提问? [ 本帖最后由 wangzh 于 2023-3-17 16:03 编辑 ]\n\n
1.论文中这个配体的结构是怎么得到的?按照博文molclus+gentor构象搜索的方法,应该得到几个能量最低的构象,这里也是这样得到的嘛?这四个构型是能量最低的四个吗?如果不是,为什么选择这样的四个构型?2.论文DTF部分的计算中,金属与配体配位,加了硝酸根离子,是因为实验在硝酸溶液中进行的,那么这里加的硝酸根是否考虑了硝酸浓度?还是说默认这里就是浓硝酸?
2.对于这样的结构,需要考虑质子化吗?如果考虑,应该怎么操作? 答:Et-Tol-DAPhen keeps strong stability in high acidity. According to the Lange’s Handbook of Chemistry Version 15th, the pKa of 1,10-Phenanthroline is 4.86 thus easy to be protonated. However, the electron-withdrawing acetamide moieties exhibit a relatively low pKa value of −0.37 [14] which strongly decrease the basicity of the ligand. As a consequence, Et-Tol-DAPhen is difficult to be protonated and shows strong stability in highly acidic media, exhibiting a significant potential to adapt the acidity in an industrial scale.
3.对于第二个问题的答案,可以解释在图2上面吗?因为图2中磺酸是不是带质子的,除非做强酸性溶液,否则磺酸很可能会以电离态为主,磺酸的pKa为1.92(at 25℃)。