A. El-Sonbati, A. F. Shoair, A. El‐Bindary
Sep 1, 2015
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0
Influential Citations
28
Citations
Journal
Journal of Molecular Liquids
Abstract
Abstract A new series of azo dye ligands 4-(4-hydroxy-5-(aryldiazenyl)-2-thioxothiazol-3(2H)-yl)benzenesulfonamide (HL n ) were synthesized by the coupling of 3-sulfamoylphenylrhodanine with aniline and its p -derivatives. These ligands and their Ru(III) complexes of the type trans -[Ru(L n ) 2 (bipy)]Cl were characterized by elemental analysis, IR, 1 H NMR and UV–Visible spectra as well as magnetic and thermal measurements. The molar conductance measurements proved that all the complexes are electrolytes. IR spectra show that the ligands (HL n ) act as a monobasic bidentate ligand by coordinating via the nitrogen atom of the azo group ( N N-) and oxygen atom of the deprotonated OH group of the rhodanine moiety, thereby forming a six-membered chelating ring and concomitant formation of an intramolecular hydrogen bond. The molecular and electronic structures of the ligands (HL n ) were also studied using quantum chemical calculations. The calf thymus DNA binding activity of the ligands (HL n ) was studied by absorption spectra measurements. The Ru(III) complexes were tested as a catalysts for the dehydrogenation of benzylamine to benzonitrile with N-methylmorpholine-N-oxide as co-oxidant at room temperature.