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越走越远铜虫 (正式写手)
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【求助】大家帮忙看一下我做的激发态 已有5人参与
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各位帮忙看一下我做的激发态, 输入如下: #p LC-WPBE/6-31g(d) td=(nstates=20,direct,singlet) scrf=(pcm,solvent=t oluene) pop=full 结果为: Excited State 1: Singlet-EU 2.1766 eV 569.61 nm f=0.0148 94 -> 96 0.46537 95 -> 97 0.53687 94 <- 96 0.11978 95 <- 97 0.11527 感觉应该不会出现94 <- 96 和 95 <- 97呀,各位帮忙分析一下原因吧!!! |
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小木虫(金币+0.5):给个红包,谢谢回帖交流
小木虫(金币+0.5):给个红包,谢谢回帖交流
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谢谢指正 -1 TDDFT/TDHF相当于CISD,更准确地说是CCSD J. Chem. Phys., Vol. 109, No. 19, 15 November 1998 “the TDDFT results rival the very accurate equation of motion coupled cluster singles and doubles (EOM-CCSD) calculations” 关于为何TDDFT比CIS好的原因 “Mathematically, this is also identical to computing matrix ele- ments between doubly excited states and the ground state. Thus we see that RPA includes higher order correlation ef- fects through double excitations that are not being accounted for in the configuration interaction singles method.” 关于去激发态无物理意义 Chem. Rev. 2005, 105, 4009−4037 This statement ought to reflect the attempt to give a math- ematical procedure a physical meaning, but of course, the “de-excitations” are nonphysical since one cannot de-excite the Hartree Fock ground state. Historically one can justify this statement, since TDHF (RPA) has been constructed to include correlation effects in the ground state by virtue of some classes of “doubly excited“ Slater determinants, and in this context, one can indeed speak about “de-excited” states. …… This again is indicated by the magni- tude of the Y amplitudes, which are a measure of the ground-state correlation and which, as a consequence, should be small compared to the X amplitudes. [ Last edited by c111999 on 2010-7-21 at 21:46 ] |
9楼2010-07-21 21:43:21
lihb734
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2楼2010-07-13 10:24:41
faqianliu
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3楼2010-07-13 16:18:01
越走越远
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4楼2010-07-13 18:01:35













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