• 제목/요약/키워드: nanosensor

검색결과 126건 처리시간 0.02초

Highly Selective Fluorescent Signaling for Al3+ in Bispyrenyl Polyether

  • Kim, Hyun-Jung;Kim, Su-Ho;Quang, Duong Tuan;Kim, Ja-Hyung;Suh, Il-Hwan;Kim, Jong-Seung
    • Bulletin of the Korean Chemical Society
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    • 제28권5호
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    • pp.811-815
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    • 2007

  • A series of bispyrenyl-polyether have been synthesized and investigated as a fluorescent chemosensor for metal ions. The results showed that bispyrenyl-polyether system is selective towards Al3+ ion over other ions tested. In free ligand, excited at 343 nm, it displays a strong excimer emission at around 475 nm with a weak monomer emission at 375 nm. A ratiometry of monomer (375 nm) increase and excimer (475 nm) quenching was shown only when Al3+ ion is bound to ligand, because two facing pyrene groups form a less efficient overlap of π?π stacking compared with that of free ligand.

  • https://doi.org/10.5012/bkcs.2007.28.5.811 인용 PDF KSCI

Induced Eye-detectable Blue Emission of Triazolyl Derivatives via Selective Photodecomposition of Chloroform under UV Irradiation at 365 nm

  • Lee, Byoung-Kwan;Yoon, Jun Hee;Yoon, Sangwoon;Cho, Byoung-Ki
    • Bulletin of the Korean Chemical Society
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    • 제35권1호
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    • pp.135-140
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    • 2014

  • A bent-shape triazolyl derivative was synthesized via click chemistry, and its photophysical property was investigated in various solvents. In contrast to the invisible ultraviolet emission of other solutions, the chloroform solution exhibited a blue light emission at 460 nm. Furthermore, the blue fluorescence intensified as the UV exposure time at 365 nm increased. On the basis of $^1H$-NMR, pH paper, and acid-addition studies, we confirmed that chloroform was decomposed into HCl with the aid of the triazolyl derivative. The density functional theory calculations suggested that the eye-detectable blue fluorescence was attributed to an intramolecular charge transfer process of the protonated triazolyl derivative in the chloroform solution.

  • https://doi.org/10.5012/bkcs.2014.35.1.135 인용 PDF KSCI KPUBS HTML