24小时热门版块排行榜    

北京石油化工学院2026年研究生招生接收调剂公告
查看: 1675  |  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

kaegi

金虫 (小有名气)

【答案】应助回帖

★ ★ ★
gmy1990(金币+3): 非常感谢你对论坛的贡献,奖励一下! 2011-06-13 10:50:41
linyanglin(金币+10): 2011-06-13 11:22:24
引用回帖:
Originally posted by linyanglin at 2011-06-13 10:00:53:
那么如果以乙醇作为溶剂的话,对基态进行优化,的命令设置为#b3lyp/lanll2dz opt freq scrf=(solvent=ch3ch2oh)这样正确吗?请问如果想要优化该化合物的氧化态,输入文件应怎样设置了?万分感谢!

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,楼主只需要改变计算输入文件中的电荷和自旋多重度就可以了。这两个参数到底是多少就取决于氧化态络合物整体的带电量和未成对电子数的多少了。
6楼2011-06-13 10:47:39
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] 材料科学与工程求调剂 +7 深V宿舍吧 2026-03-29 7/350 2026-03-30 20:43 by dophin1985
[考研] 281求调剂 +5 亚克西good 2026-03-26 7/350 2026-03-30 20:42 by dophin1985
[考研] 求收留 +6 1943443204 2026-03-28 6/300 2026-03-30 20:37 by dick_runner
[考研] 309求调剂 +15 谁不是少年 2026-03-29 15/750 2026-03-30 19:28 by 2026材料调剂
[考研] 0703一志愿9,初试成绩:338,四六级已过,有科研经历,求调剂! +7 Zuhui0306 2026-03-25 7/350 2026-03-30 19:01 by 源_2020
[考研] 287求调剂 +14 land xuxu 2026-03-26 14/700 2026-03-30 18:38 by 544594351
[考研] 334分 一志愿武理 材料求调剂 +16 李李不服输 2026-03-26 16/800 2026-03-30 17:47 by wangjy2002
[考研] 317分 一志愿南理工材料工程 本科湖工大 求调剂 +12 芋泥小铃铛 2026-03-28 12/600 2026-03-30 17:06 by wangjy2002
[考研] 303求调剂 +7 DLkz1314. 2026-03-30 7/350 2026-03-30 16:05 by shuang5186
[考研] 294分080500材料科学与工程求调剂 +8 柳溪边 2026-03-26 8/400 2026-03-29 20:42 by 唐沐儿
[考研] 本科双非材料,跨考一志愿华电085801电气,283求调剂,任何专业都可以 +6 芝士雪baoo 2026-03-28 8/400 2026-03-29 08:16 by 松花缸1201
[考研] 本科新能源科学与工程,一志愿华理能动285求调剂 +7 AZMK 2026-03-28 11/550 2026-03-28 21:01 by xxxsssccc
[考研] 本科新能源科学与工程,一志愿华理能动285求调剂 +3 AZMK 2026-03-27 5/250 2026-03-28 16:19 by xxxsssccc
[考研] 0703化学求调剂,各位老师看看我!!! +5 祁祺祺 2026-03-25 5/250 2026-03-27 21:44 by 东方猪猪
[考研] 求调剂 +4 零八# 2026-03-27 4/200 2026-03-27 18:07 by yu221
[考研] 调剂 +3 李嘉图·S·路 2026-03-27 3/150 2026-03-27 11:19 by wangjy2002
[考研] 07化学303求调剂 +5 睿08 2026-03-25 5/250 2026-03-25 22:46 by 418490947
[考研] 求调剂 +3 李李不服输 2026-03-25 3/150 2026-03-25 13:03 by cmz0325
[考研] 一志愿武理085500机械专业总分300求调剂 +3 an10101 2026-03-24 7/350 2026-03-25 00:00 by 山鬼0-
[考研] 300分,材料,求调剂,英一数二 +5 超赞的 2026-03-24 5/250 2026-03-24 21:07 by 星空星月
信息提示
请填处理意见