Calix[4]arene-based fluorescent receptor for selective turn-on detection of Hg2+ ions

Kumar, Manoj ; Kumar, Naresh ; Bhalla, Vandana ; Kaur, Amandeep (2013) Calix[4]arene-based fluorescent receptor for selective turn-on detection of Hg2+ ions Supramolecular Chemistry, 25 (1). pp. 28-33. ISSN 1061-0278

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Official URL: https://www.tandfonline.com/doi/abs/10.1080/106102...

Related URL: http://dx.doi.org/10.1080/10610278.2012.720019

Abstract

A new fluorescent molecular receptor 3 based on the cone confirmation of calix[4]arene appended with 2-[4-(N,N-dimethylaminophenyl)iminoethoxy] moieties was synthesised, which exhibits selective fluorescence ‘Turn-On’ response in the presence of only Hg2+ ions among the various metal ions tested with a detection limit up to the nanomolar range. The fluorescence behaviour of receptor 3 in the presence of Hg2+ ions is attributed to the alteration in electronic properties of 3, i.e. working of intramolecular charge transfer (ICT) phenomenon on Hg2+ ions complexation. The nitrogen atoms of the imino moieties got involved in the coordination with mercury ions, which enhances the electron-withdrawing ability of imino nitrogen atoms and, hence, leads to an ICT process consequently resulting in the appearance of an emission band at 444 nm.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Group.
Keywords:Calix[4]Arene; N,N-Dimethylaminobenzaldehyde; Hg2+ Ions, Turn-On, Nanomolar
ID Code:113961
Deposited On:18 May 2018 10:17
Last Modified:18 May 2018 10:17

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