On-off switchable binuclear chemosensor based on thiacalix[4]crown armed with pyrene moieties

Kumar, Manoj ; Dhir, Abhimanew ; Bhalla, Vandana (2009) On-off switchable binuclear chemosensor based on thiacalix[4]crown armed with pyrene moieties European Journal of Organic Chemistry, 2009 (26). pp. 4534-4540. ISSN 1434-193X

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/ejoc.2...

Related URL: http://dx.doi.org/10.1002/ejoc.200900506

Abstract

A new fluorescent “on–off” switchable chemosensor 2 based on a thiacalix[4] arene with a 1,3‐alternate conformation and two different types of cation binding sites has been synthesized. Two pyrene moieties linked to a cation recognition unit composed of two imine groups form a strong excimer in solution. Of the metal ions tested, the fluorescence of 2 was strongly quenched by Hg2+, Pb2+ and Cu2+ ions. The fluorescence was revived by the addition of only K+ to the Cu2+ ligand complex. Thus, metal‐ion exchange triggers an “on–off” switchable fluorescent chemosensor.

Item Type:Article
Source:Copyright of this article belongs to John Wiley & Sons, Inc.
Keywords:Thiacalixarenes; Crown Compounds; Pyrene; Fluorescence; Molecular Devices; Chemosensor
ID Code:113331
Deposited On:18 May 2018 09:11
Last Modified:18 May 2018 09:11

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