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dc.contributor.author채필석-
dc.date.accessioned2019-12-09T07:04:02Z-
dc.date.available2019-12-09T07:04:02Z-
dc.date.issued2018-09-
dc.identifier.citationDYES AND PIGMENTS, v. 156, page. 307-317en_US
dc.identifier.issn0143-7208-
dc.identifier.issn1873-3743-
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S0143720818303905?via%3Dihub-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/120143-
dc.description.abstractIn this study, we designed and prepared pyrene-based dipodal probes with a range of molecular flexibility for picric acid (PA) detection. These probes commonly contain a central rigid core, but probe 1 contains relatively short linkers/spacers compared to probes 2 and 3. The dipodal probes produced dominant pyrene excimer fluorescence in an aqueous solution, and aggregation-induced emission enhancement (AIEE) was observed. The fluorescence emission of probe I was significantly quenched only by the presence of PA, while probes 2 and 3 were responsive to 4-nitrophenol or 2,4-dinitrophenol as well as PA. Of the three dipodal probes, the highest binding strength was observed for probe 1 with PA, which gave an association constant of K-alpha = 3.96 x 10(7) M-1.H-1 NMR measurements and DFT calculations indicate that, upon addition of PA, these dipodal probes formed individual probe-PA complexes via pi-pi interactions between the pyrene ring and PA in an aqueous solution. This complex formation enabled energy transfer from electron-rich pyrene to electron-poor PA upon excitation, leading to fluorescence quenching. Probe 1 provided ultra-trace detection of PA in water, with observed and calculated limit of detections (LOD) of 1 nM and 0.13 pM, respectively, one of the lowest values reported. Effective fluorescence quenching was also obtained using probe 1-coated filter paper or TLC plate with PA solution/vapor, suggesting the significant potential of this sensing system in real-time applications. These studies were supported by FE-SEM, TEM, and UV-visible, fluorescence, NMR and DFT calculations.en_US
dc.description.sponsorshipThis work was supported by the National Research Foundation of Korea (NRF) funded by the Korean government (MSIP) (grant number 2008-0061891 to P.S.C. and A.K.).en_US
dc.language.isoen_USen_US
dc.publisherELSEVIER SCI LTDen_US
dc.subjectAIEEen_US
dc.subjectPyreneamideen_US
dc.subjectExcimer emissionen_US
dc.subjectPAen_US
dc.subjectVapor sensingen_US
dc.titleAggregation induced emission enhancement behavior of conformationally rigid pyreneamide-based probe for ultra-trace detection of picric acid (PA)en_US
dc.typeArticleen_US
dc.relation.volume156-
dc.identifier.doi10.1016/j.dyepig.2018.04.014-
dc.relation.page307-317-
dc.relation.journalDYES AND PIGMENTS-
dc.contributor.googleauthorKumar, Ashwani-
dc.contributor.googleauthorChae, Pil Seok-
dc.relation.code2018000583-
dc.sector.campusS-
dc.sector.daehakGRADUATE SCHOOL[S]-
dc.sector.departmentDEPARTMENT OF BIONANOTECHNOLOGY-
dc.identifier.pidpchae-
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GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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