24小时热门版块排行榜    

查看: 1640  |  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)

引用回帖:
Originally posted by kaegi at 2011-06-13 10:47:39:
如果用g09的话,应该是#p b3lyp/lanl2dz opt freq scrf=(solvent=Ethanol)
这里有一点疑问,楼主的计算体系里都有些什么元素,如果全部用Lanl2dz不一定合理。
另外如果要计算氧化态的络合物的话,楼主只需要 ...

你说的这些我都明白,但具体怎样设置就不太确定了。我计算的体系主要有C、N、O、H、Zn或F等,使用LANL2dz应该可以吧?另外溶剂写入为分子式或英文名称应该是一样的吧!你帮我看看我的分子结构,顺便帮我猜猜它的氧化态的电荷和多重态呗!谢谢啦!呵呵

7楼2011-06-13 11:42:30
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306英一数二 +4 z1z2z3879 2026-03-16 6/300 2026-03-16 19:38 by z1z2z3879
[考研] 0854控制工程 359求调剂 可跨专业 +3 626776879 2026-03-14 9/450 2026-03-16 17:42 by 626776879
[考研] 梁成伟老师课题组欢迎你的加入 +8 一鸭鸭哟 2026-03-14 9/450 2026-03-16 17:35 by 沐霖12138
[考研] 318求调剂 +3 Yanyali 2026-03-15 3/150 2026-03-16 16:41 by houyaoxu
[考研] 材料工程327求调剂 +3 xiaohe12w 2026-03-11 3/150 2026-03-14 20:20 by ms629
[考研] 材料080500调剂求收留 +3 一颗meteor 2026-03-13 3/150 2026-03-14 10:54 by peike
[考研] 学硕285求调剂 +13 Wisjxn 2026-03-12 46/2300 2026-03-14 10:33 by JourneyLucky
[考研] 271求调剂 +10 生如夏花… 2026-03-11 10/500 2026-03-14 00:35 by 卖报员小雨
[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] b区环境工程求调剂 +4 Maps1 2026-03-10 6/300 2026-03-14 00:23 by JourneyLucky
[考研] 318求调剂 +3 李新光 2026-03-10 3/150 2026-03-14 00:21 by JourneyLucky
[考研] 311求调剂 +8 zchqwer 2026-03-10 8/400 2026-03-14 00:01 by JourneyLucky
[考研] 341求调剂 +4 番茄头--- 2026-03-10 4/200 2026-03-13 23:12 by JourneyLucky
[考研] 材料371求调剂 +9 鳄鱼? 2026-03-11 11/550 2026-03-13 22:53 by JourneyLucky
[考研] 【考研调剂求收留】 +3 Ceciilia 2026-03-11 3/150 2026-03-13 20:18 by JourneyLucky
[考研] 328化工专硕求调剂 +4 。,。,。,。i 2026-03-12 4/200 2026-03-13 14:44 by JourneyLucky
[考研] 070303一志愿西北大学学硕310找调剂 +3 d如愿上岸 2026-03-13 3/150 2026-03-13 10:43 by houyaoxu
[考研] 08食品或轻工求调剂,本科发表3篇sci一区top论文,一志愿南师大食品科学与工程 +3 我是一个兵, 2026-03-10 3/150 2026-03-13 10:21 by Yuyi.
[考研] 求调剂材料专硕293 +6 段_(:з」∠)_ 2026-03-10 6/300 2026-03-10 18:22 by ms629
[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