A facile ratiometric and colorimetric azo-dye possessing chemosensor for Ni2+ and AcO− detection

A new tailor-made colorimetric chemosensor 1, containing pyridine and benzothiazole moieties connected through an azo (–N = N–) linkage has been synthesised. In 9:1 (v/v) aqueous THF (pH 7.0 HEPES buffer), it showed a conspicuous naked-eye colour change upon binding to Ni2+ (colourless to light green) and AcO− (colourless to orange) resulting in their ratiometric sensing. The cation and anion recognition property of the chemosensor 1 was monitored by UV–vis spectral analysis and 1H NMR titrations.

[1]  N. Kaur,et al.  Simple naked-eye ratiometric and colorimetric receptor for anions based on azo dye featuring with benzimidazole unit , 2015 .

[2]  H. Fun,et al.  A highly selective ratiometric chemosensor for Ni2+ in a quinoxaline matrix , 2014 .

[3]  You‐Ming Zhang,et al.  A highly selective colorimetric chemosensor for detection of nickel ions in aqueous solution , 2014 .

[4]  B. Li,et al.  Triphenylamine based benzimidazole and benzothiazole: Synthesis and applications in fluorescent chemosensors and laser dyes , 2014 .

[5]  Sangita Das,et al.  A chemodosimeter for the ratiometric detection of hydrazine based on return of ESIPT and its application in live-cell imaging. , 2013, Organic letters.

[6]  S. Goswami,et al.  A simple quinoxaline-based highly sensitive colorimetric and ratiometric sensor, selective for nickel and effective in very high dilution , 2013 .

[7]  P. Hernández-Sánchez,et al.  Complexation of Eugenol (EG), as Main Component of Clove Oil and as Pure Compound, with β- and HP-β-CDs , 2012 .

[8]  B. Machura,et al.  Syntheses, structures, spectroscopic properties and DFT calculations of Re(V)-benzothiazole and 2-(2-aminophenyl)benzothiazole complexes , 2012 .

[9]  P. Kaur,et al.  The synthesis and development of a dual-analyte colorimetric sensor: Simultaneous estimation of Hg2+ and Fe3+ , 2011 .

[10]  Rupam Sarma,et al.  Study on changes in optical properties of phenylbenzothiazole derivatives on metal ion binding. , 2010, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[11]  H. Lin,et al.  A novel chromo- and fluorogenic dual responding H2PO4 receptor based on an azo derivative , 2009 .

[12]  Fuyou Li,et al.  Azo dyes based on 8-hydroxyquinoline benzoates : Synthesis and application as colorimetric Hg2+-selective chemosensors , 2008 .

[13]  Lei Zhu,et al.  Facile quantification of enantiomeric excess and concentration with indicator-displacement assays: an example in the analyses of alpha-hydroxyacids. , 2004, Journal of the American Chemical Society.

[14]  R. Martínez‐Máñez,et al.  Towards the development of colorimetric probes to discriminate between isomeric dicarboxylates. , 2003, Angewandte Chemie.

[15]  E. Anslyn,et al.  A colorimetric sensing ensemble for heparin. , 2002, Journal of the American Chemical Society.

[16]  R. Martínez‐Máñez,et al.  A selective chromogenic reagent for nitrate. , 2002, Angewandte Chemie.

[17]  V. Lynch,et al.  Quinoxaline-oligopyrroles: improved pyrrole-based anion receptors. , 2002, Chemical communications.

[18]  E. Anslyn,et al.  Using a synthetic receptor to create an optical-sensing ensemble for a class of analytes: a colorimetric assay for the aging of scotch. , 2001, Journal of the American Chemical Society.

[19]  V. Lynch,et al.  A 'building block' approach to functionalized calix[4]pyrroles , 2000 .