Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 채필석 | - |
dc.date.accessioned | 2019-12-09T07:04:02Z | - |
dc.date.available | 2019-12-09T07:04:02Z | - |
dc.date.issued | 2018-09 | - |
dc.identifier.citation | DYES AND PIGMENTS, v. 156, page. 307-317 | en_US |
dc.identifier.issn | 0143-7208 | - |
dc.identifier.issn | 1873-3743 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/abs/pii/S0143720818303905?via%3Dihub | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/120143 | - |
dc.description.abstract | In 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.sponsorship | This 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.iso | en_US | en_US |
dc.publisher | ELSEVIER SCI LTD | en_US |
dc.subject | AIEE | en_US |
dc.subject | Pyreneamide | en_US |
dc.subject | Excimer emission | en_US |
dc.subject | PA | en_US |
dc.subject | Vapor sensing | en_US |
dc.title | Aggregation induced emission enhancement behavior of conformationally rigid pyreneamide-based probe for ultra-trace detection of picric acid (PA) | en_US |
dc.type | Article | en_US |
dc.relation.volume | 156 | - |
dc.identifier.doi | 10.1016/j.dyepig.2018.04.014 | - |
dc.relation.page | 307-317 | - |
dc.relation.journal | DYES AND PIGMENTS | - |
dc.contributor.googleauthor | Kumar, Ashwani | - |
dc.contributor.googleauthor | Chae, Pil Seok | - |
dc.relation.code | 2018000583 | - |
dc.sector.campus | S | - |
dc.sector.daehak | GRADUATE SCHOOL[S] | - |
dc.sector.department | DEPARTMENT OF BIONANOTECHNOLOGY | - |
dc.identifier.pid | pchae | - |
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