24小时热门版块排行榜    

查看: 1632  |  回复: 11
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

linyanglin

木虫 (著名写手)

[求助] 请问有人知道怎样计算配合物基态的氧化电势,急用!如果解决了再送50金币

The rigorous way to obtain the GSOP (also termed ΔGox) is to compute the free
energy difference between the neutral and the oxidized GS species, (G0 - G+)GS.16 The Gibbs free energy in solution of a species i (Gsolv) is defined as Gsolv=Gvac+ ΔGsolv, where Gvac is the Gibbs free energy in gas phase and ΔGsolv
is the free energy of solvation. Gvac is obtained by performing a singlepoint calculation at the optimized geometry in vacuo, followed by frequency calculations in order to include the vibrational contribution to the total partition function. ΔGsolv
i is obtained by a single-point calculation in solution and a reference calculation in gas phase at the geometry optimized in solution.Geometry optimizations of the neutral and oxidized sensitizers were carried out in gas phase and in acetonitrile, that is the solvent experimentally employed for the electrochemical measures,
by using the B3LYP exchange-correlation functional and a 6-31G* basis set. Solvation effects were taken into account by means of the C-PCM solvation model as implemented in Gaussian 03 (G03). We employ the UAHF radii, expressly
optimized to reproduce the experimental solvation energy of a
series of organic molecules. For the calculation of ΔGox we adopted a 6-31+G* basis set, which includes both diffuse and polarization functions, since
in preliminary calculations we found a sizable effect (+0.2-0.3
eV) of the diffuse functions on the computed ΔGox. We tested
the performance of different GGA, hybrid GGA and meta-hybrid
GGA functionals, also combining different exchange and
correlation parts, in order to elucidate the combined effect on
the computed ΔGox of the local and nonlocal HF exchange as
well as of the correlation functional.
每个吉布斯自由能是如何得到的,输入文件的关键词应该怎样设置呢,谢谢。

[ Last edited by linyanglin on 2011-6-10 at 20:11 ]
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

linyanglin

木虫 (著名写手)

送鲜花一朵
引用回帖:
Originally posted by kaegi at 2011-06-13 19:08:23:
建议对C,H,O,N,F用6-31G(d0)基组,对Zn用lanl2dz基组。不知道你这个是几价的Zn。带电荷数和自选多重度是从图上看不出来的啊!再给点提示吧,呵呵。

呵呵,应该是2价的,问了问我导师,他说设置为1 2就行。不过你说的用的是混合基组吗,没有用过,倒是听我师姐提到过。6-31G对Zn应该也是用吧?
9楼2011-06-13 19:59:38
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 12 个回答

gmy1990

荣誉版主 (著名写手)

优秀版主优秀版主

【答案】应助回帖

linyanglin(金币+5): 谢谢! 2011-06-13 09:37:06
做个优化,执行路径加上freq=noraman(不算拉曼),最后搜索sum,就会有你想要的吉布斯自由能!
2楼2011-06-13 08:42:16
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

linyanglin

木虫 (著名写手)

引用回帖:
Originally posted by gmy1990 at 2011-06-13 08:42:16:
做个优化,执行路径加上freq=noraman(不算拉曼),最后搜索sum,就会有你想要的吉布斯自由能!

但是上面的文献上应该说的是分别计算改配合物基态和氧化态的吉布斯自由能,而其基态吉布斯自由能是先在真空中优化,然后再计算真空中的单点能=Gvac然后加上该基态在溶剂中优化再分别计算它在气相和溶剂中的单点能,即ΔGsolv,故算出基态的吉布斯自由能。Gsolv=Gvac+ ΔGsolv,但是请问此处的气相指的是该配合物吗?谢谢
3楼2011-06-13 09:16:42
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

gmy1990

荣誉版主 (著名写手)

优秀版主优秀版主

【答案】应助回帖

linyanglin(金币+5): 谢谢! 2011-06-13 10:01:14
引用回帖:
Originally posted by linyanglin at 2011-06-13 09:16:42:
但是上面的文献上应该说的是分别计算改配合物基态和氧化态的吉布斯自由能,而其基态吉布斯自由能是先在真空中优化,然后再计算真空中的单点能=Gvac然后加上该基态在溶剂中优化再分别计算它在气相和溶剂中的单点 ...

高斯中计算所谓气相和溶剂下都是指体系所处环境,所谓的溶剂下,也就是你计算的体系是液相环境,气相也就是真空环境.
4楼2011-06-13 09:49:21
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 材料专硕326求调剂 +5 墨煜姒莘 2026-03-15 5/250 2026-03-16 21:30 by 木瓜膏
[考研] 东南大学364求调剂 +5 JasonYuiui 2026-03-15 5/250 2026-03-16 21:28 by 木瓜膏
[基金申请] 国自科面上基金字体 +6 iwuli 2026-03-12 7/350 2026-03-16 21:18 by sculhf
[基金申请] 今年的国基金是打分制吗? 50+3 zhanghaozhu 2026-03-14 3/150 2026-03-16 17:07 by 北京莱茵润色
[考研] 0703化学调剂,求各位老师收留 +8 秋有木北 2026-03-14 8/400 2026-03-16 15:21 by 哦哦123
[考研] 材料工程专硕274一志愿211求调剂 +5 薛云鹏 2026-03-15 5/250 2026-03-15 20:38 by Logic2024
[考研] 机械专硕调剂 +3 笨笨兔子 2026-03-12 3/150 2026-03-15 20:02 by 栗子粥?
[考研] 274求调剂 +4 时间点 2026-03-13 4/200 2026-03-15 15:29 by Rambo13
[考研] 一志愿哈工大材料324分求调剂 +5 闫旭东 2026-03-14 5/250 2026-03-14 14:53 by 木瓜膏
[考研] 招收0805(材料)调剂 +3 18595523086 2026-03-13 3/150 2026-03-14 00:33 by 123%、
[考研] 308求调剂 +3 是Lupa啊 2026-03-10 3/150 2026-03-14 00:30 by JourneyLucky
[考研] 一志愿中科院,化学方向,295求调剂 +4 一氧二氮 2026-03-11 4/200 2026-03-13 22:35 by JourneyLucky
[考研] 材料与化工求调剂一志愿 985 总分 295 +8 dream…… 2026-03-12 8/400 2026-03-13 22:17 by 星空星月
[考研] 336求调剂 +6 Iuruoh 2026-03-11 6/300 2026-03-13 22:06 by JourneyLucky
[考研] 求材料调剂 085600英一数二总分302 前三科235 精通机器学习 一志愿哈工大 +4 林yaxin 2026-03-12 4/200 2026-03-13 22:04 by 星空星月
[考研] 考研调剂 +4 芬达46 2026-03-12 4/200 2026-03-13 16:04 by ruiyingmiao
[考博] 福州大学杨黄浩课题组招收2026年专业学位博士研究生,2026.03.20截止 +3 Xiangyu_ou 2026-03-12 3/150 2026-03-13 09:36 by duanwu655
[考研] 321求调剂(食品/专硕) +3 xc321 2026-03-12 6/300 2026-03-13 08:45 by xc321
[考研] 290求调剂 +3 柯淮然 2026-03-10 8/400 2026-03-11 13:48 by 柯淮然
[考研] 085602化工求调剂 +7 董boxing 2026-03-10 7/350 2026-03-10 17:07 by BruceLiu320
信息提示
请填处理意见