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13/13用GaussSum用高斯画态密度图的方法1、用实验室现成的GaussSum做DOS图时,发现log文件过大分析不了,下载到最新版本的问题就解决了。

2、经常出现cclibhasproblemsparsing***.log问题,检查自己的log文件是否完整.

3、关于做PDOS(重点哈),做单点能计算时必须要有pop=fulliop(3/33=1,3/36=-1),关键字,这在GaussSum帮助文件和例子里面写得很详细.至于做PDOS的时候,需要有group.txt文件,选择做atoms时,具体的两个要求是每个原子要列出以及所列原子不能重复,这里我还得补充一点group.txt格式,

atomsﻫpart1(你所想要分析的某个分子部分)

1—5,8-20,30(该部分原子序号)ﻫpart2ﻫ6—7,21-29,31—33(注意了,直接保存就可以,下面不能有空行,我被这个给整惨了)

在选择用orbitals时,大致一样,唯一不同就是不必列出所有的轨道。

4、就以上例子分析,我要的结果是part1和part2的PDOS,但GaussSum做出来的part1和part2的图的结果是part1和total(图上显示的是part2,经过数据对比很明显就是total)或者part2和total(同理),估计是我下载的软件bug,但可以从它产生的DOSSpectrum.txt文件(里面有你想要的part1,part2,total)提取数据在origin里面作图,结果就很好了。

5、在做COOP时,和做PDOS一个样.关于做其他图,遇到的问题就没什么了,只要你的log文件没错,基本就okay!WorkedExampleDescriptionAstudyoftheelectronicstructureandvibrationalspectrumof1,4—divinyl-benzene(attheB3LYP/STO-3Gleveloftheory)usingGaussian03W.ConfiguringGaussSumIopenedtheSettingsdialogbox,byclickingon,andverifiedthatthelocationoftheGnuplotexecutablewascorrectbyclickingontheTestbutton.GeometryoptimisationInputfile:

[PhCCCC_gopt.gjf]Partialoutputfile:

[PhCCCC_gopt_partial。out]Completeoutputfile:

[PhCCCC_gopt.out]DuringtheinitialSCFcalculation,IranGaussSum("MonitorSCF";defaults;PhCCCC_gopt_partial.out)toseewhetherthecalculationwasconverging.Theresultisshownbelow.Thelineisheadingtowardszero,whichindicatesthattheSCFisconverging.Theprogressofthegeometryoptimisationwasalsomonitoredduringthecalculation.Thegeometryoptimisationproceededsmoothlytoanenergyminimumasshownbythegraphbelow("MonitorGeoOpt";defaults;PhCCCC_gopt。out).MolecularorbitalinformationInputfile:

[PhCCCC_gopt.gjf]Outputfile:

[PhCCCC_gopt。out]GaussSumoutputs:

[gausssum2.1/orbital_data。txt]

[gausssum2.1/DOS_spectrum.txt]Iextractedthemolecularorbitalinformationfromtheoutputthegeometryoptimisation("Orbitals”;defaults;PhCCCC_gopt.out).Molecularorbitalinformationwaswrittentotheorbital_data.txtasubdirectorycalledgausssum2。1。Informationonthefrontierorbitalsisshownbelow.MO eVﻩSymmetry40 L+4ﻩ7.42 BG39ﻩL+3 4。96ﻩAU38 L+2 3.01ﻩBG37ﻩL+1ﻩ2.46ﻩAU36 LUMO 1.02 AU35ﻩHOMOﻩ-4.17ﻩBG34 H-1 -5.31 BG33 H-2 -5。78ﻩAU32 H-3ﻩ—7.17 BG31ﻩH—4ﻩ—7。82ﻩAGAdensityofstatesdiagramwasconvolutedfromthemolecularorbitaldata("Orbitals";DOS,start=-15,end=8,FWHM=0.3;PhCCCC_gopt。out).Itisshownbelow.Thedatausedtodrawthisgraphiscontainedingausssum2。1/DOS_spectrum。txt.Input:

[PhCCCC_pop。gjf]Output:

[PhCCCC_pop.out]GaussSuminput:

[gausssum2.1/groups。txt]GaussSumoutputs:

[gausssum2.1/orbital_data。txt]

[gausssum2.1/DOS_spectrum.txt]

[gausssum2.1/origin_orbs.txt]Iwantedtodescribeeachmolecularorbitalintermsofapercentcontributionfromthebenzeneportion,andapercentcontributionfromthedivinylportion.GaussSumcanuseMullikenpopulationanalysistodothis(pleasebeawarethatMullikenpopulationanalysishassomesevereshortcomings).Firstofall,IneededtomakeGaussianoutputorbitaloverlapinformationandinformationonthemolecularorbitalcoefficients。ThisrequiredasinglepointenergycalculationwiththekeywordsPOP=FULLIOP(9/33=1,9/36=-1).Next,Icreatedagroups.txtinthegausssum2.1subdirectory,whichcontainedthefollowinglines:atomsC6H41-8,19—20C=C9—18Finally,IusedGaussSumtocalculatethemolecularorbitalcontributionsagain(”Orbitals";defaults;PhCCCC_pop.out,gausssum2.1/groups.txt).Thistime,orbital_data。txtcontainedmoreinformation(seebelowforinformationonthefrontierorbitals)。TheHOMOisabout50/50C6H4

anddivinyl。Theso-called'accuratevalues'shouldbeignored,althoughtheyarerequiredforthe"Electronictransitions"optiontocalculatechangesinelectrondensity.(Notethatthesecolumnsaretab—separatedandsocanbeimportedeasilyintospreadsheetsoftware.)MOﻩ eVﻩSymmetryﻩC6H4ﻩC=CﻩAccuratevalues(fortheElectronictransitionsmodule)38ﻩL+2ﻩ3.01 BG 17ﻩ83 0.168430209324ﻩ0。8315700245237 L+1ﻩ2.46 AU 100 0ﻩ0.999818653049ﻩ0。061336ﻩLUMO 1。02 AU 54 46 0.543282127318ﻩ0.45672539915335 HOMO —4.17ﻩBGﻩ54ﻩ46ﻩ0。541778503997 0.45822859435434ﻩH—1 -5.31ﻩBGﻩ100 0 0.999877441172ﻩ0.335933 H—2 -5.78ﻩAUﻩ15ﻩ85 0.154899304133 0.845103027118TheinitialDOSspectrumcreatedbyGaussSumdidnotincludeanyofthevirtualorbitals.Asaresult,Iwantedtochangethestartandendpointofthespectrum,butIdidnotwanttorecalculateallofthecontributionsofthegroups。Iset"Useexistingorbital_data。txt?"toTRUE,andalteredthevaluesofstartandenduntilIwashappy(”Orbitals”;start=—15,end=8,FWHM=0.3,"Useexistingorbital_data.txt?"=TRUE;PhCCCC_pop.out):Anicerimagecanbecreatedusingspreadsheetsoftware,oraprogramsuchasMicrocalOrigin,andthe.TheimagebelowwascreatedusingMicrocalOrigin(forLinux,tryScigraphicaorGrace).InsteadofdrawingaDOScurve,youmayprefertouseamorestraightforwarddepictionofthebreakdownofmolecularorbitalsbetweenvariousgroupsinamolecule.Todoso,set"Createoriginorbs。txt”toTRUE,andrerunGaussSum("Orbitals”;start=—15,end=8,FWHM=0.3,”Useexistingorbital_data.txt?"=TRUE,"Createoriginorbs。txt?”=TRUE;PhCCCC_pop.out).OriginorGracemaythenbeusedtocreatetheimageshownbelowusingthedataingausssum2。1/origin_orbs。txt(itmaytakesomepractice-inOriginyouneedtosetthecolumnsXYXY,andplotthefourcolumnsusing2—pointsegments).Input:

[PhCCCC_pop.gjf]Output:

[PhCCCC_pop.out]GaussSuminput:

[gausssum2.1/groups.txt]GaussSumoutputs:

[gausssum2.1/COOP_data.txt]

[gausssum2.1/COOP_spectrum。txt]TheinteractionbetweenthetwogroupscanbevisualisedusingaCOOP(CrystalOrbitalOverlapPopulation)diagram.Thisinteractionismeasuredbythedegreeofpositive/negativeoverlapforaparticularmolecularorbital。Formoreinformationonitsuse,seethepaperofHerlemandLakardlistedinthebibliography。ThediagrambelowwascreatedfromPhCCCC_pop.outusingGaussSum("Orbitals";COOP,start=-15,end=8,FWHM=0.3;PhCCCC_pop。out,gausssum2。1/groups.txt)。VibrationalspectrumInput:

[PhCCCC_IR.gjf]Output:

[PhCCCC_IR。out]GaussSumoutputs:

[gausssum2.1/IRSpectrum.txt]

[gausssum2.1/IRSpectrum。txt(afterscaling)]IcalculatedthevibrationalfrequenciesofdivinylbenzeneandtheirassociatedIRintensities.GaussSumextractsthisinformationfromtheloggausssum/IRSpectrum。txt("Frequencies";start=0,end=1000,numpts="500",FWHM=3,Scalingfactors=(General,1。00);PhCCCC_IR.out):NormalModesMode Label Freq(cm—1) IRact1ﻩAU 52。7881 0。03232ﻩBG 83.9368ﻩ 0。03 AUﻩ148。1571ﻩ0.38264ﻩBUﻩ178。6727 0.2686Iwantedtoscaleallnormalmodesgreaterthan1000cm—1

by0.5(thisisnotarealexample!:—)。IopenedIRSpectrum.txtinExcel,andchangedthevaluesforthescalingfactorsfrom1.00to0。5forthosenormalmodesgreaterthan1000cm-1.IresavedIRSpectrum.txtinthesameformat(Tab-separated)andlocation.Afterchoosingthe"Frequencies"optionIchose"Individualscalingfactors”andranGaussSumagain("Frequencies";start=0,end=1000,numpts=500,FWHM=3,scalingfactors=Individual;PhCCCC_IR。out,gausssum2。1/IRSpectrum。txt).Theresultisshownbelow。UV-VisibleSpectrumInput:

[PhCCCC_TD。gjf]Output:

[PhCCCC_TD。out]GaussSumoutputs:

[gausssum2.1/UVSpectrum.txt]

[gausssum2.1/UVData。txt]IwantedtocalculatetheUV-Visabsorptionspectrumofdivinylbenzene。IaddedthekeywordIOP(9/40=2)totheTD—DFTcommand,tooutputinformationonsmallercontributionstoeachelectronictransition.Iranthe”Electronictransitions"optionwiththedefaultsettings(”Electronictransitions”;start=300,end=800,numpts=500,fwhm=3000;PhCCCC_TD.out)butnographwasdrawn,andtherewasamessage"Therearenopeaksinthiswavelengthrange!".Ilookedatgausssum2.1/UVData.txtandsawthatthelowestenergypeakwasatabout230nm.Iranthe"Electronictransitions"optionagain,thistimeusingmoreappropriatevaluesforthestartandendofthediagram("Electronictransitions”;start=170,end=270,numpts=500,fwhm=3000;PhCCCC_TD。out)andtheresultisshownbelow(thisinformationiswrittentogausssum2。1/UVSpectrum.txt).Theiscreatedcontainingthefo

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