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13/13用GaussSum用高斯畫態(tài)密度圖的方法1、用實驗室現(xiàn)成的GaussSum做DOS圖時,發(fā)現(xiàn)log文件過大分析不了,下載到最新版本的問題就解決了。

2、經(jīng)常出現(xiàn)cclibhasproblemsparsing***.log問題,檢查自己的log文件是否完整.

3、關(guān)于做PDOS(重點哈),做單點能計算時必須要有pop=fulliop(3/33=1,3/36=-1),關(guān)鍵字,這在GaussSum幫助文件和例子里面寫得很詳細(xì).至于做PDOS的時候,需要有g(shù)roup.txt文件,選擇做atoms時,具體的兩個要求是每個原子要列出以及所列原子不能重復(fù),這里我還得補充一點group.txt格式,

at(yī)oms?part1(你所想要分析的某個分子部分)

1—5,8-20,30(該部分原子序號)?part2?6—7,21-29,31—33(注意了,直接保存就可以,下面不能有空行,我被這個給整慘了)

在選擇用orbitals時,大致一樣,唯一不同就是不必列出所有的軌道。

4、就以上例子分析,我要的結(jié)果是part1和part2的PDOS,但GaussSum做出來的part1和part2的圖的結(jié)果是part1和total(圖上顯示的是part2,經(jīng)過數(shù)據(jù)對比很明顯就是total)或者part2和total(同理),估計是我下載的軟件bug,但可以從它產(chǎn)生的DOSSpectrum.txt文件(里面有你想要的part1,part2,total)提取數(shù)據(jù)在origin里面作圖,結(jié)果就很好了。

5、在做COOP時,和做PDOS一個樣.關(guān)于做其他圖,遇到的問題就沒什么了,只要你的log文件沒錯,基本就okay!Wo(hù)rkedExampleDescriptionAstudyoftheelectronicstructureandvibrationalspectrumof1,4—divinyl-benzene(attheB3LYP/STO-3Gleveloftheory)usingGaussian03W.ConfiguringGaussSumIopenedtheSettingsdialogbox,byclickingon,andverifiedthatthelocationoftheGnuplotexecutablewascorrectbyclickingontheTestbutton.GeometryoptimisationI(lǐng)nputfile:

[PhCCCC_gopt.gjf]Partialoutputfile:

[PhCCCC_gopt_partial。out]Completeoutputfile:

[PhCCCC_gopt.out]DuringtheinitialSCFcalculat(yī)ion,IranGaussSum("MonitorSCF";defaults;PhCCCC_gopt_partial.out)toseewhetherthecalculationwasconverging.Theresultisshownbelow.Thelineisheadingtowardszero,whichindicatesthat(yī)theSCFisconverging.Theprogressofthegeometryoptimisat(yī)ionwasalsomonitoredduringthecalculation.Thegeometryoptimisat(yī)ionproceededsmoothlytoanenergyminimumasshownbythegraphbelow("MonitorGeoOpt";defaults;PhCCCC_gopt。out).Molecularorbitalinformat(yī)ionI(lǐng)nputfile:

[PhCCCC_gopt.gjf]Outputfile:

[PhCCCC_gopt。out]GaussSumoutputs:

[gausssum2.1/orbital_data。txt]

[gausssum2.1/DOS_spectrum.txt]Iextractedthemolecularorbitalinformationfromtheoutputthegeometryoptimisat(yī)ion("Orbitals”;defaults;PhCCCC_gopt.out).Molecularorbitalinformationwaswrittentotheorbital_data.txtasubdirectorycalledgausssum2。1。Informationonthefrontierorbitalsisshownbelow.MO eV?Symmetry40 L+4?7.42 BG39?L+3 4。96?AU38 L+2 3.01?BG37?L+1?2.46?AU36 LUMO 1.02 AU35?HOMO?-4.17?BG34 H-1 -5.31 BG33 H-2 -5。78?AU32 H-3?—7.17 BG31?H—4?—7。82?AGAdensityofstatesdiagramwasconvolutedfromthemolecularorbitaldata("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,IneededtomakeGaussianoutputorbitaloverlapinformationandinformat(yī)iononthemolecularorbitalcoefficients。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.)MO? eV?Symmetry?C6H4?C=C?Accurat(yī)evalues(fortheElectronictransitionsmodule)38?L+2?3.01 BG 17?83 0.168430209324?0。8315700245237 L+1?2.46 AU 100 0?0.999818653049?0。061336?LUMO 1。02 AU 54 46 0.543282127318?0.45672539915335 HOMO —4.17?BG?54?46?0。541778503997 0.45822859435434?H—1 -5.31?BG?100 0 0.999877441172?0.335933 H—2 -5.78?AU?15?85 0.154899304133 0.845103027118TheinitialDOSspectrumcreatedbyGaussSumdidnotincludeanyofthevirtualorbitals.Asaresult,Iwantedtochangethestartandendpointofthespectrum,butIdidnotwanttorecalculat(yī)eallofthecontributionsofthegroups。Iset"Useexistingorbital_data。txt?"toTRUE,andalteredthevaluesofstartandenduntilIwashappy(”Orbitals”;start=—15,end=8,F(xiàn)WHM=0.3,"Useexistingorbital_dat(yī)a.txt?"=TRUE;PhCCCC_pop.out):Anicerimagecanbecreatedusingspreadsheetsoftware,oraprogramsuchasMicrocalOrigin,andthe.Theimagebelowwascreat(yī)edusingMicrocalOrigin(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)]Icalculatedthevibrat(yī)ionalfrequenciesofdivinylbenzeneandtheirassociatedIRintensities.GaussSumextractsthisinformat(yī)ionfromtheloggausssum/IRSpectrum。txt("Frequencies";start=0,end=1000,numpts="500",F(xiàn)WHM=3,Scalingfactors=(General,1。00);PhCCCC_IR.out):NormalModesMode Label Freq(cm—1) IRact1?AU 52。7881 0。03232?BG 83.9368? 0。03 AU?148。1571?0.38264?BU?178。6727 0.2686Iwantedtoscaleallnormalmodesgreaterthan1000cm—1

by0.5(thisisnotarealexample!:—)。IopenedIRSpectrum.txtinExcel,andchangedthevaluesforthescalingfactorsfrom1.00to0。5forthosenormalmodesgreaterthan1000cm-1.IresavedIRSpectrum.txtinthesameformat(yī)(Tab-separated)andlocation.Afterchoosingthe"Frequencies"optionIchose"Individualscalingfactors”andranGaussSumagain("Frequencies";start=0,end=1000,numpts=500,F(xiàn)WHM=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]Iwantedtocalculat(yī)etheUV-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.txtandsawthat(yī)thelowestenergypeakwasatabout230nm.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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