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huilovezhe

金虫 (小有名气)

[求助] 用高斯算发射光谱,结构扭曲

大家好:
我用高斯计算发射光谱的时候,分子中的结构总是变得特别不合理,比如香豆素分子,结构很容易就散掉了,这是为什么呢?求大家给我指点指点

计算方法:
1)优化基态结构: opt freq
2)基于上述优化出来的结构算发射光谱:td(nstates=5,singlets) opt

用高斯算发射光谱,结构扭曲
7S44X0THOS~]A38H(C2PJXM.png
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huilovezhe

金虫 (小有名气)

引用回帖:
2楼: Originally posted by 小范范1989 at 2015-12-23 09:37:06
应该说明你找的这个s1不是最低点,而是鞍点。

这是优化几次一直不收敛,优化优化就到这样了
3楼2015-12-23 13:57:16
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小范范1989

木虫 (著名写手)

应该说明你找的这个s1不是最低点,而是鞍点。
It doesn't matter how slow you are, as long as you're determined to get there, you'll get there.
2楼2015-12-23 09:37:06
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