有机小分子空穴传输材料取代基效应的理论研究密士珍(临沂大学化学化工学院临沂276000)密士珍女,博士,讲师,主要从事电致发光材料、分子反应动力学研究。E-mail:mishizhen@lyu.edu.cn国家自然科学基金项目(21705070)和山东省自然科学基金项目(ZR2014AL016)资助2022-07-20收稿,2022-08-23接受摘要在B3LYP/6-31G(d)水平下对N,N'-二苯基-N,N'-二(1-萘基)-1,1'-联苯-4,4'-二胺(以下简称NTD)及其衍生物(以下简称NTDs)的中性态和离子态结构进行优化,得到各物质的重组能并进行比较。结果显示,NTD分子的化学修饰对重组能λ变化趋势的影响是电子诱导效应和共轭效应共同作用的结果:(1)吸电子诱导效应会引起NTD分子重组能的升高;多重取代位的吸电子效应对分子重组能影响具有相互抵消的作用,不具有简单加和性;给电子诱导效应会引起NTD分子重组能的降低;(2)o位、m位的正共轭效应使体系重组能剧烈升高,共轭作用在o位、m位取代时占主导作用;p位的正共轭效应使体系重组能降低;(3)大范围的共轭π键可能引起所取代的苯环电子分布发生根本性变化,导致分子构型随之发生剧烈变化,从而重组能急剧升高。关键词重组能空穴传输钙钛矿太阳能电池有机小分子TheoreticalStudyontheSubstituteEffectofOrganicSmallMolecularHoleTransferMaterialsMiShizhen(CollegeofChemistryandChemicalEngineering,LinyiUniversity,Linyi,276000)AbstractInthisarticle,thegeometryofallmolecules,includingN,N'-diphenyl-N,N'-bis(1-naphthyl)-(1,1'-biphenyl)-4,4'-diamine(NTD)anditsderivatives(NTDs),isoptimizedforboththeneutralandcationstates.Thenthereorganizationenergyiscalculated.AllcalculationsareperformedatB3LYP/6-31G(d)level.TheresultsindicatethatthechemicalmodificationsonNTDcouldinducethevarietyofthereorganizationenergy.Andthiscanbeattributedtotheinteractionofinductiveeffectandconjugatedeffect.(1)Theelectron-withdrawingeffectwillincreasethereorganizationenergy.Thereorganizationenergywillbereducedwiththeelectron-donatingeffect.Theelectronabsorptioneffectofmultiplesubstitutionshasacounteractingeffectonmolecularreorganizationenergy,whichdoesnothavesimpleadditiveproperty.(2)Theortho-,meta-positiveconjugateeffectwillincreasethereorganizationenergydramatically,whilethepara-positivec...