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cj4566

木虫 (正式写手)

[求助] gaussian 09溶剂化荧光发射的例子第4步运行出错

我在运行高斯09的溶剂中荧光发射的例子时出错,希望前辈们指点一下啊。按照http://www.gaussian.com/g_tech/g_ur/k_scrf.htm的步骤,在第4步的时候出错,最后出现的信息是:
  Cartesian force constants read from checkpoint file:
  04-ac.chk
  Length of force constants on CHK file is     0 NAT3TT is   231
  Error termination via Lnk1e in /chimie/soft/g09/l103.exe

执行的计算是:
%chk=04-ac
# B3LYP/6-31+G(d,p) TD=(Read,NStates=6,Root=1) SCRF=(Solvent=Ethanol)
  Geom=Modify Guess=Read Opt=RCFC

Acetaldehyde: excited state opt
Modify geometry to break Cs symmetry
since first excited state is A"

0 1

4 1 2 3 10.0
5 1 2 7 -50.0
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cj4566

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关于例子的step4,我跟高斯官方确认了一下,step4应该读取step2的的checkpoint文件,同时去掉“=RCFC”,具体见邮件回复:

Thank you for your inquiry. "Step 4" should read the checkpoint file from "Step 2", since both of them use the linear-response approach to compute the excited state wave functions ("Step 3" follows the "StateSpecific" approach, so it is a little different). Nevertheless, the TD calculation in "Step 2" removed the force constants from the checkpoint file that came from "Step 1". In general, there would not be much harm in just removing the "RCFC" option from "Step 4" since it is a geometry optimization on the excited state but the force constants were from the ground state, and the curvature of the potential energy surfaces for the two states can be different in that region.


If the force constants from the ground state are useful for your calculation on the excited state, then use a copy of "01-ac.chk" for your "Step 4" calculation instead of a copy of "02-ac.chk", in which case, you would then have to remove the "Read" option from the "TD" keyword since "01-ac.chk" does not contain transition densities.
10楼2012-04-24 06:28:53
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Illusionist

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★ ★
gmy1990: 金币+2 2012-04-09 11:28:35
去掉 “=RCFC”
因为你的前一步没有频率计算。
# B3LYP/6-31+G(d,p) TD=(Read,NStates=6,Root=1) SCRF=(Solvent=Ethanol)
  Geom=Modify Guess=Read Opt

这样应该没问题
2楼2012-04-09 10:24:43
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cj4566

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引用回帖:
2楼: Originally posted by Illusionist at 2012-04-09 10:24:43:
去掉 “=RCFC”
因为你的前一步没有频率计算。
# B3LYP/6-31+G(d,p) TD=(Read,NStates=6,Root=1) SCRF=(Solvent=Ethanol)
  Geom=Modify Guess=Read Opt

这样应该没问题

太感谢了,我也觉得去掉“=RCFC”就不会报错。但是想不通为什么例子要读那个力常数。还有一个问题,下面的4 1 2 3 10.0
5 1 2 7 -50.0 是改变一下二面角来破坏对称性吧,这里后面的角度是可以随便改的吧,对其他体系也只要稍微改变结构就行?谢谢了!
3楼2012-04-10 11:39:41
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Illusionist

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引用回帖:
3楼: Originally posted by cj4566 at 2012-04-10 11:39:41:
太感谢了,我也觉得去掉“=RCFC”就不会报错。但是想不通为什么例子要读那个力常数。还有一个问题,下面的4 1 2 3 10.0
5 1 2 7 -50.0 是改变一下二面角来破坏对称性吧,这里后面的角度是可以随便改的吧,对其他 ...

这个我也不太感确定,反正我算的时候就是不改的。
4楼2012-04-10 13:41:31
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