5-Chlorosalicylaldehyde Based New Chromo-Fluorogenic Schiff base Probes for Cu(II), Mn(II), CN, S and CO ions - Appositeness in Bioimaging and Molecular Logic Gate.

Two new multifunctional fluorescent Schiff base chemosensors 2,2'-(4-chlorophenyl)methylene)bis(azanylylidene))bis(methanylylidene))bis(4-chlorophenol) (CSCB) and 2,2'-(4-methoxyphenyl)methylene)bis(azanylylidene))bis(methanylylidene))bis(4-chlorophenol) (CSMB) were synthesized by following solvent free one pot synthesis approach for the colorimetric detection of Cu(II), Mn(II), CO, S and CN ions. The Schiff base chemosensors showed a colorimetric response towards the ions, where there was appearance of yellow color over colorless Schiff base solution. The detection process was accomplished by absorption and emission methods in aqueous methanol medium.

Heterocyclic fluorescent Schiff base chemosensors for the detection of Fe(III) and Cu(II) ions.

Two new Schiff bases were synthesized from 1-(2,4-dihydroxyphenyl)ethanone and pyridine derivatives. Both compounds were characterized using infrared, UV-Vis., H NMR, C NMR and mass spectral studies.