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Solvent effect and fluorescence response of the 7-tert-butylpyrene-dipicolylamine linkage for the selective and sensitive response toward Zn(II) and Cd(II) ions

Kowser, Zannatul; Tomiyasu, Hirotsugu; Jiang, Xuekai; Rayhan, Ummey; Redshaw, Carl; Yamato, Takehiko

Authors

Zannatul Kowser

Hirotsugu Tomiyasu

Xuekai Jiang

Ummey Rayhan

Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry

Takehiko Yamato

Abstract

The different binding behaviour of 7-tert-butylpyrene based chemosensors bearing dipicolylamine (Dpa) linkages at the 1,3-positions was investigated in various solvents for the sensing of Zn(II) and Cd(II).The potential mono-chelating ligand L1 follows the same binding pattern in both THF and methanol–water solvent systems, exhibiting higher selectivity and sensitivity for Cd(II) over Zn(II) mainly in THF solvent system. The potential bis-chelate ligand L2 can selectively bind both Zn(II) and Cd(II) in a 1:1 ratio in THF, whereas in methanol–water (7:3) at pH = 7.0; a 1:2 binding ratio was observed. In THF, two sites of ligand L2 can only selectively and sensitively bind one Zn(II) or Cd(II). The different complexation behaviour of L1 and L2 in different solvents were studied by means of fluorescence spectra and ¹H-NMR titration experiments in the presence of Zn(II) and Cd(II).

Journal Article Type Article
Publication Date May 1, 2015
Journal New journal of chemistry
Print ISSN 1144-0546
Electronic ISSN 1369-9261
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 39
Issue 5
Pages 4055-4062
Institution Citation Kowser, Z., Tomiyasu, H., Jiang, X., Rayhan, U., Redshaw, C., & Yamato, T. (2015). Solvent effect and fluorescence response of the 7-tert-butylpyrene-dipicolylamine linkage for the selective and sensitive response toward Zn(II) and Cd(II) ions. New journal of chemistry = Nouveau journal de chimie, 39(5), 4055-4062. doi:10.1039/c4nj02363c
DOI https://doi.org/10.1039/c4nj02363c
Keywords Binding behaviour, Fluorescence response, 7-tert-butylpyrene
Publisher URL http://pubs.rsc.org/en/Content/ArticleLanding/2015/NJ/C4NJ02363C#!divAbstract
Copyright Statement ©2016 University of Hull
Additional Information Author's accepted manuscript of article which has been published in: New journal of chemistry, 2015, v.39, issue 5.

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