| 5 | 1/1 | 返回列表 |
| 查看: 2391 | 回復(fù): 31 | ||||
| 當(dāng)前只顯示滿足指定條件的回帖,點(diǎn)擊這里查看本話題的所有回帖 | ||||
[求助]
GAUSSIAN怎么計(jì)算overlap matrix?
|
||||
|
本人非專業(yè)GAUSSIAN使用者,請問GAUSSIAN怎么計(jì)算overlap matrix , molecular orbital coefficients and energies ?如果可以,請列出輸入文件,謝謝! F0= SCC ,沒法顯示…… where S is the intermolecular overlap matrix, and C and are the dimer Kohn-Sham orbital’s coefficients and energies. The noninteracting molecular orbitals of the two individual molecules are calculated separately by the standard self- consistent field procedure. These noninteracting orbitals are then used to construct the dimer Kohn-Fock matrix. Namely, it takes directly the unperturbed individual molecule’s orbital and density matrix to guarantee that originally, the two mol- ecules are noninteracting, and only when putting them to- gether, one can get interaction information with respect to the individual molecules in the spirit of first-order perturba- tion. All of the calculations are performed with the GAUSSIAN 03 package 詳細(xì)的請看PHYSICAL REVIEW B 79, 115203 2009 [ Last edited by 賀儀 on 2011-10-17 at 16:20 ] |

版主 (著名寫手)
|
為什么只是算兩個(gè)分子HOMO之間的呢?而且還只是overlap integral呢? 兩個(gè)分子之間的作用并不是二者HOMO之間的作用,把兩個(gè)分子放在一起算,之間的作用就都有了。 當(dāng)然如何放分子,可以觀察A的HOMO與B的LUMO,或者A的LUMO與B的HOMO,看二者如何搭配、放置作為初始優(yōu)化的起點(diǎn)比較好。優(yōu)化的結(jié)果就得到了兩個(gè)分子之間的作用了。 兩個(gè)分子之間的overlap integral,只是軌道(用基組表達(dá)的)之間的,說明不了問題。要考察的是重疊布居。 將AB的計(jì)結(jié)果在Multiwfn中求全AB的電子密度ρAB,并在Multiwfn中進(jìn)一步分別求分子片A、分子片B的電子密度ρa(bǔ)、ρB。求電子密度差Δρ=ρAB-ρa(bǔ)-ρB。 這時(shí)Δρ就是分子片A、分子片B之間的重疊布居。 [ Last edited by zhou2009 on 2011-10-17 at 19:30 ] |
專家顧問 (職業(yè)作家)
地溝油冶煉專家
![]() |
專家經(jīng)驗(yàn): +458 |

版主 (著名寫手)
專家顧問 (職業(yè)作家)
地溝油冶煉專家
![]() |
專家經(jīng)驗(yàn): +458 |
| 如果你問“怎么計(jì)算overlap matrix”:gaussian至少有兩種算法。iop(3/38=2)用標(biāo)準(zhǔn)公式算。目前默認(rèn)的prism方法很繁瑣,思路是先把所有積分轉(zhuǎn)化成標(biāo)準(zhǔn)的雙電子積分一般公式,然后用統(tǒng)一的方法計(jì)算,有點(diǎn)畫蛇添足的感覺。 |

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 南京大學(xué)化學(xué)調(diào)劑 +8 | 景隨風(fēng) 2026-03-29 | 11/550 |
|
|---|---|---|---|---|
|
[考研] 283求調(diào)劑(080500) +7 | A child 2026-03-27 | 7/350 |
|
|
[考研] 356求調(diào)劑 +3 | gysy?s?a 2026-03-28 | 3/150 |
|
|
[考研] 322求調(diào)劑 +7 | 宋明欣 2026-03-27 | 7/350 |
|
|
[考研] 本科新能源科學(xué)與工程,一志愿華理能動(dòng)285求調(diào)劑 +3 | AZMK 2026-03-27 | 5/250 |
|
|
[考研] 085602 化工專碩 338分 求調(diào)劑 +12 | 路癡小琪 2026-03-27 | 12/600 |
|
|
[考研] 322求調(diào)劑 +5 | 舊吢 2026-03-24 | 5/250 |
|
|
[材料工程] 一志愿C9材料與化工專業(yè)總分300求調(diào)劑 +8 | 曼111 2026-03-24 | 9/450 |
|
|
[考研] 材料求調(diào)劑 一志愿哈工大總分298分,前三科223分 +5 | dongfang59 2026-03-27 | 5/250 |
|
|
[考研] 275求調(diào)劑 +10 | jjjjjjjjjjl 2026-03-27 | 10/500 |
|
|
[考研] 284求調(diào)劑 +11 | junqihahaha 2026-03-26 | 12/600 |
|
|
[考研]
材料調(diào)劑
5+4
|
想要一壺桃花水 2026-03-25 | 10/500 |
|
|
[考研]
|
平樂樂樂 2026-03-26 | 4/200 |
|
|
[考研] 打過很多競賽,085406控制工程300分,求調(diào)劑 +3 | askeladz 2026-03-26 | 3/150 |
|
|
[考研] 求b區(qū)院校調(diào)劑 +4 | 周56 2026-03-24 | 5/250 |
|
|
[考研] 292求調(diào)劑 +4 | 鵝鵝鵝額額額額?/a> 2026-03-24 | 4/200 |
|
|
[考研] 材料/農(nóng)業(yè)專業(yè),07/08開頭均可,過線就行 +3 | 呵唔哦豁 2026-03-23 | 4/200 |
|
|
[考研] 269求調(diào)劑 +4 | 我想讀研11 2026-03-23 | 4/200 |
|
|
[考研] 接收2026碩士調(diào)劑(學(xué)碩+專碩) +4 | allen-yin 2026-03-23 | 6/300 |
|
|
[考研] 求老師收我 +3 | zzh16938784 2026-03-23 | 3/150 |
|