A quinazolin-based Schiff-base chemosensor for colorimetric detection of Ni and Zn ions and '' fluorometric detection of Zn ion.

Herein, we have reported a novel quinazolin-based Schiff base chemosensor ()-2-benzamido-'-(1-(pyridin-2-yl)ethylidene)benzohydrazide (L). L has been designed, synthesised and characterised by H-NMR, IR spectroscopy, ESI-MS spectrometry and theoretical studies. The receptor showed appreciable colorimetric shift for both Ni and Zn ions and fluorometric "" response in presence of only Zn ion.

A novel dihydro phenylquinazolinone-based two-in-one colourimetric chemosensor for nickel(ii), copper(ii) and its copper complex for the fluorescent colourimetric nanomolar detection of the cyanide anion.

Currently, considerable efforts have been devoted to the detection and quantification of hazardous multi-analytes using a single probe. Herein, we have developed a simple, environment-friendly colourimetric sensor for the sensitive, selective and rapid detection of Ni and Cu ions using a simple organic Schiff base ligand L in methanol-Tris-HCl buffer (1 : 1 v/v, 10 mM, pH = 7.2).

Triazole-based novel bis Schiff base colorimetric and fluorescent turn-on dual chemosensor for Cu and Pb: application to living cell imaging and molecular logic gates.

A triazole-based novel bis Schiff base colorimetric and fluorescent chemosensor (L) has been designed, synthesized and characterized by elemental analysis, H-NMR, ESI-MS, FTIR spectra and DFT studies. The receptor L showed selective and sensitive colorimetric sensing ability for Cu and Pb ions by changing color from colorless to yellow and light yellow respectively in CHOH-tris-buffer (1 : 1, v/v). However, it displayed strong fluorescence enhancement upon the addition of both Cu and Pb ions, attributed to the blocking of PET.

A novel hydrazide-based selective and sensitive optical chemosensor for the detection of Ni ions: applications in live cell imaging, molecular logic gates and smart phone-based analysis.

A novel flexible "N", "O"-rich hydrazide-based Schiff base chemoreceptor, 2-(benzamido)-N'-((pyridin-2-yl)methylene)benzohydrazide (L), was designed, synthesised and characterised viaH-NMR, IR spectroscopy, ESI-MS spectrometry and single-crystal XRD analysis. The receptor showed a colorimetric and fluorometric "turn on" response in the presence of only Ni ions in methanol-Tris-HCl buffer medium (10 mM, pH 7.2, 1 : 1 v/v).

A dual-mode highly selective and sensitive Schiff base chemosensor for fluorescent colorimetric detection of Ni and colorimetric detection of Cu.

In this paper, a novel flexible Schiff base chemosensor N'-(2-hydroxy-3-methoxybenzylidene)-2-(benzamido)benzohydrazide (L) has been designed, synthesised and characterised by 1H-NMR, IR spectroscopy, ESI-MS spectrometry and single crystal XRD analysis. A significant fluorescence enhancement of L was observed only in the presence of Ni2+ ions with a detection limit of 3.64 μM whereas Cu2+ induced fluorescence quenching, although both the metals showed colorimetric responses in methanol-Tris-HCl buffer (10 mM, pH 7.

A dipodal molecular probe for naked eye detection of trivalent cations (Al, Feand Cr) in aqueous medium and its applications in real sample analysis and molecular logic gates.

A simple and low cost multifunctional colorimetric receptor L has been designed, synthesized and characterized by H-NMR, IR spectroscopy, ESI-MS spectrometry and elemental analysis. The chemosensor L can selectively detect three biologically and environmentally important trivalent metal ions (Al, Feand Cr) both visually and spectrophotometrically in CHCN-HO (1 : 1, v/v) solution in the presence of other biologically relevant metal ions. The Job's plot analyses indicate the 2 : 2 binding stereochemistry for Al, Fe and Cr ions with L, which was further confirmed by H-NMR and ESI-MS studies.