A novel chemosensor based on unsymmetrical squaraine dye (USQ-1) for the selective detection of Hg(2+) in aqueous media is described. USQ-1 in combination with metal ions shows dual chromogenic and "turn-on" fluorogenic response selectivity toward Hg(2+) as compared to Li(+), Na(+), K(+), Mg(2+), Ca(2+), Ba(2+), Al(3+), Cu(2+), Cd(2+), Mn(2+), Fe(3+), Ag(+), Pb(2+), Zn(2+), Ni(2+) and Co(2+) du...

New thiacalix[4]crown derivatives 4 and 5 of 1,3-alternate conformation possessing anthracene and quinoline moieties respectively were synthesised and examined for their cation recognition abilities toward different cations by fluorescence spectroscopy. Selective optical recognition with fluorescence amplification was observed for Fe(3+)/K(+) and Hg(2+)/K(+) in chemosensors 4 and 5 respectively...

A reaction-based chemosensor (AF-1) was designed, synthesized and applied as an optical approach for quantitative measurement of F(-) in MeCN. In the presence of F(-), selective fluoride-assisted desilylation instantly gave colorimetric and fluorogenic signals, providing a dual-optical channel for the detection of F(-). (1)H NMR titration was carried out to investigate the desilylation process,...

A new benzothiazole-based chemosensor BTN (1-((Z)-(((E)-3-methylbenzo[d]thiazol-2(3H)-ylidene)hydrazono)methyl)naphthalen-2-ol) was synthesized for the detection of Cu2+. could detect Cu2+ with “off-on” fluorescent response from colorless to yellow irrespective presence other cations. Limit determined be 3.3 μM. Binding ratio and turned out a 1:1 analysis Job plot ESI-MS. Sensing feature by exp...

A novel of Chemosensor compound 4-((E)-(2-(2,4-dinitrophenyl) hydrazineylidene) methyl)-2-methoxy-6-((E)-phenyldiazenyl)phenol has designed and synthesized from 2,4-dinitrophenyl hydrazine (E)-4-hydroxy-3-methoxy-5-(phenyldiazenyl)benzaldehyde. This sensor was applied as a colorimetric for recognition cyanide anion in acetonitrile solution. In the presence ion, solution turned bright yellow to ...