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时间:2020-03-26
《基于4-氨基-1,8萘酰亚胺的双光子荧光H2S探针光学性质与响应机理分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学报(WuliHuaxueXuebao)DecemberActa.一Chim.Sin.2015,31(12),2303-23092303[Article]doi:10.3866/PKU.WHXB201510233www.whxb.pku.edu.ca基于4.氨基.1,8萘酰亚胺的双光子荧光H2S探针光学性质与响应机理分析杨文静张玉瑾王传奎(山东师范大学物理与电子科学学院,济南250014)摘要:基于密度泛函理论水平上的解析响应函数方法,采用极化连续模型(PCM)研究了两种新型的截断型双光子荧光HS探针AcHS.1,2的单双
2、光子吸收及荧光发射性质,并对其响应机制进行了理论分析.计算结果表明,AcHS.1,2在与HS反应后,生成物的单双光子吸收性质特别是荧光发射性质发生了明显的变化,它们的吸收峰都有较大的红移.此外,不同末端基团对探针分子的光学性质也有一定的影响.分析了探针分子AcHS-1,2与HS反应前后的Mulliken布居及电荷转移过程,反应后分子内电荷转移量增大,从而改变了分子的光学性质,实现了对HS的探测.关键词:荧光探针;双光子吸收:HS:分子内电荷转移中图分类号:0644;O641OpticalPropertiesandResponsiv
3、eMechanismof4-Amino·1,8-Naphthalimide·BasedTwo-PhotonFluorescentProbeforSensingHydrogenSulfideYANGWen—JingZHANGYu-JinWANGChuan—Kui(CollegeofPhysicsandElectronics,ShandongNormalUniversity,Jinan250014,P.R.China)Abstract:Responsetheorywasusedtoinvestigateone.photonabsorp
4、tion(OPA)andemission,andtwo·photonabsorption(TPA)oftwonoveltruncatedtwo—photonfluorescentprobesAcHS-1,2inthepresenceandabsenceofH,Susingdensityfunctionaltheoryincombinationwiththepolarizablecontinuummode1.Changesintheopticalproperties,includinglargeredshiftsoftheOPA,T
5、PA,andemissionpeakpositionswereobservedwhentheprobesreactedwithH2S,indicatingthatAcHS一1,2makeeffectiveandselectivechemosensorsforH,S.WehavealsodemonstratedthattheterminaIgroupontheprobesinfluencedtheirnonlinearopticalpropertiesfAcHS一1:n-butylgroupandAcHS-2:hydroxyethy
6、lgroup).TheresponsivemechanismofAcHS-1,2f0rsensingH2SwasanalyzedbystudyingthechargevariationsbetweenthechargetransferandgroundstatesofthefreemoleculesandtheirreactionproductsusingMullikenpopulationanalysis.1mportantly.thismechanismwasattributedtoanintramolecularcharge
7、transfer.KeyWords:Fluorescentprobe;Two-photonabsorption;H2S:Intramolecularchargetransfer1引言要的角色,与生物体的健康息息相关.硫化氢一些生物小分子在环境和生命体中扮演着重(HS)作为一种非常重要的内源性气体信号分子,广Received:August3,2015;Revised:October23,2015;PublishedonWeb:October23,2015.Correspondingauthor.Email:ckwang@sdnu.e
8、du.cn;Tel:+86.531.86180892.TheprojectwassupportedbytheStateKeyDevelopmentProgramforBasicResearchofChina(973)(201ICB808100)国家
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