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各位老师:[url=]Color[/url]
我的是纯有机体系,做的是有机机理,关于过渡态自由能方面的问题
(1) 做结构优化及振动分析采用的是:
B3LYP-D3(BJ) methodwith 6-31 G (d, p) 溶剂模型是IEFPCM
(2) 基与这个优化结构计算单点能则采用的是
M062x-D3/def2-TZVP 溶剂模型是IEFPCM
(3)计算溶剂自由能则采用的是:
M062X/6-31g (d) 溶剂模型是IEFPCM
自由能采用的是(1)矫正+(2)scf done 电子能 +(3)溶剂溶解能
现在有两位审稿人的意见如下:
一位是问:为什么采用不同的泛函做结构优化和能量计算。 因为最开始采用M062X的时候找过渡态没有找到,就换成了B3LYP-D3(BJ) ,现在要怎么回答审稿人呢。
另外一位给的意见是:
the authors should be aware that free energies (and any other quantity obtained from vibrational frequencies) are only meaningful if computed at the very same level at which the molecular geometry was obtained (see Gaussian manual, or any other QM code's manual for the matter). Otherwise, most likely, the geometry will not be an optimum one, and the computed free energy will not be reliable, which seems to be the case here. This happens because different functionals produce different potential energy surfaces, especially when coupled with different basis sets
and/or different formalisms such as SCRF. All inconsistent free energy calculations should be repeated, paying attention to using the same DFT/SCRF method and basis set from geometry optimization to free energy evaluation. In addition, evidence of reliability of the selected methods should be presented, either by performing reference tests or by citing appropriate literature.
这个也是要回答泛函不一致的问题吗,是不是要求重算的意思。如果要重算的话可以不可以把单点能那块用B3LYP-D3(BJ)/6-311 ++ G(d,p)代替重算呢,谢谢大家的意见
感激不尽。
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