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dc.contributor.author윤주영-
dc.date.accessioned2019-01-02T16:30:18Z-
dc.date.available2019-01-02T16:30:18Z-
dc.date.issued2019-
dc.identifier.issn0925-4005-
dc.identifier.otherOAK-24007-
dc.identifier.urihttp://dspace.ewha.ac.kr/handle/2015.oak/248086-
dc.description.abstract2-(Benzothiazol-2-yl)pyren-1-ol (P3-NS) was developed as a excited-state intramolecular proton transfer (ESIPT)- based sensor for nitroaromatic compounds (NACs). Results of studies of its photophysical and optical properties show that P3-NS exists in various, solvent dependent isomeric forms arising from rotation about the C–C bond connecting the benzothiazole and pyren-1-ol rings and the location of the pyrene-OH proton. The results of density functional theory (DFT) calculations enabled identification of the major structures of P3-NS dissolved in different solvents. Upon electronic excitation in nonpolar or weakly polar solvents, P3-NS undergoes an ESIPT reaction to form a product that only weakly fluoresces. In contrast, P3-NS exists in a strongly fluorescent deprotonated form in highly polar solvents. The results of time-dependent DFT calculations indicate that fluorescence quenching of the product generated by ESIPT reaction of P3-NS is caused by intersystem crossing at a conical intersection between S 1 and T 2 states. The anionic form of P3-NS, present in highly polar solvents, was shown to be a fluorescence sensor for nitroaromatic compounds (NACs). Fluorescence quenching by NACs occurs by protonation of the anionic form of P3-NS (static quenching) and by photoinduced electron transfer from the anionic form to NACs (dynamic quenching). © 2018 Elsevier B.V.-
dc.languageEnglish-
dc.publisherElsevier B.V.-
dc.subjectDynamic quenching-
dc.subjectESIPT-
dc.subjectNitroaromatic compounds-
dc.subjectPyrene-
dc.subjectStatic quenching-
dc.title2-(Benzothiazol-2-yl)pyren-1-ol, a new excited state intramolecular proton transfer-based fluorescent sensor for nitroaromatic compounds-
dc.typeArticle-
dc.relation.volume280-
dc.relation.indexSCI-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.startpage298-
dc.relation.lastpage305-
dc.relation.journaltitleSensors and Actuators, B: Chemical-
dc.identifier.doi10.1016/j.snb.2018.10.043-
dc.identifier.wosidWOS:000450302300037-
dc.identifier.scopusid2-s2.0-85055043845-
dc.author.googleHu Y.-
dc.author.googleJoung J.F.-
dc.author.googleJeong J.-E.-
dc.author.googleJeong Y.-
dc.author.googleWoo H.Y.-
dc.author.googleShe Y.-
dc.author.googlePark S.-
dc.author.googleYoon J.-
dc.contributor.scopusid윤주영(7403587371)-
dc.date.modifydate20190828111506-
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자연과학대학 > 화학·나노과학전공 > Journal papers
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