title: Mixed-ligand Ru(II) complexes with 2,2'-bipyridine and tetradentate Schiff bases auxiliary ligands: Synthesis, physico-chemical study, DFT analysis, electrochemical and Na+ binding properties.
abstract: cis-Bis(2,2'-bipyridyl)dichlororuthenium(II)dihydrate complexed with Schiff bases salen (L1H2) and salophen (L2H2) provides complexes of compositions [Ru(L1)(bpy)2] 1 and [Ru(L2)(bpy)2] 2, respectively with cavity. The structure of these complexes characterized by spectroscopic studies were supported by their optimized geometries based on DFT calculations. Complexes 1 and 2 were then allowed to interact with methanolic solution of sodium perchlorate separately providing corresponding complexes 3 and 4 with the compositions 1.NaClO4 and 2.NaClO4, respectively. The formation constants were then evaluated by monitoring the changes in their UV-visible spectral features upon addition of different amount of sodium salts in the presence of a fixed concentration of the ruthenium complexes at a wavelength 294 nm. Emission (solution), luminescence microscopic and cyclic voltammetric studies of these complexes have also been made.
authors.affiliation: Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India. lmishrabhu@yahoo.co.in
authors.forename: Lallan
authors.initials: L
authors.lastname: Mishra
authors.forename: Rishikesh
authors.initials: R
authors.lastname: Prajapati
authors.forename: Krishna Kumar
authors.initials: KK
authors.lastname: Pandey
mesh_terms: D015082:2,2'-Dipyridyl / Q000138:chemical synthesis / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004563:Electrochemistry; D005029:Ethylenediamines / Q000737:chemistry; D008024:Ligands; D000432:Methanol / Q000737:chemistry; D015394:Molecular Structure; D010472:Perchlorates / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*; D012459:Salicylates / Q000737:chemistry; D012545:Schiff Bases / Q000138:chemical synthesis / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*; D017670:Sodium Compounds / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002614:Chelating Agents; D005029:Ethylenediamines; D008024:Ligands; D010472:Perchlorates; D012459:Salicylates; D012545:Schiff Bases; D017670:Sodium Compounds; D012996:Solutions; C090416:salophen; D015082:2,2'-Dipyridyl; D012428:Ruthenium; C011452:disalicylaldehyde ethylenediamine; C031068:sodium perchlorate; D012964:Sodium; D000432:Methanol; D004121:Dimethyl Sulfoxide