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tephoon78木蟲(chóng) (正式寫(xiě)手)
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[交流]
【求助】Gaussian如何計(jì)算共振拉曼(resonance raman) ? 已有4人參與
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查看了gaussian中freq關(guān)鍵字,里面提到了Pre-resonance Raman,這個(gè)是所謂的共振拉曼嗎? 另外,關(guān)于它的輸入,說(shuō)明書(shū)中講的很模糊,有點(diǎn)看不明白。如下: Pre-resonance Raman. This calculation type is requested with one of the Raman options in combination with CPHF=RdFreq. The frequency specified for the latter should be chosen as follows: • Determine the difference in frequency between the peak of interest in the Raman spectrum and the incident light used in the experiment. • Perform a TD calculation using a DFT method in order to determine the predicted location of the same peak. • Specify a frequency for CPHF=RdFreq which is shifted from the predicted peak by the same amount as the incident light differs from the observed peak. 這個(gè)說(shuō)明我有點(diǎn)看不明白,可能需要兩個(gè)數(shù)值,一個(gè)是實(shí)驗(yàn)值,另外一個(gè)如何確定呢? 找到了一個(gè)gaussian自帶的例子test558 #p rb3lyp/3-21g freq=raman geom=modela test cphf=rdfreq Gaussian Test Job 558: MeOH frequency-dependent raman intensities 0,1 o h me 0.1 0.15 后面的0.1 0.15是怎么確定呢? |
拉曼光譜 |
木蟲(chóng) (小有名氣)
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木蟲(chóng) (正式寫(xiě)手)
木蟲(chóng) (正式寫(xiě)手)
木蟲(chóng) (正式寫(xiě)手)
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