title: Spectroscopic studies on Solvatochromism of mixed-chelate copper(II) complexes using MLR technique.
abstract: Mixed-chelate copper(II) complexes with a general formula [Cu(acac)(diamine)]X where acac=acetylacetonate ion, diamine=N,N-dimethyl,N'-benzyl-1,2-diaminoethane and X=BPh(4)(-), PF(6)(-), ClO(4)(-) and BF(4)(-) have been prepared. The complexes were characterized on the basis of elemental analysis, molar conductance, UV-vis and IR spectroscopies. The complexes are solvatochromic and their solvatochromism were investigated by visible spectroscopy. All complexes demonstrated the positive solvatochromism and among the complexes [Cu(acac)(diamine)]BPh(4)·H(2)O showed the highest Δν(max) value. To explore the mechanism of interaction between solvent molecules and the complexes, different solvent parameters such as DN, AN, α and β using multiple linear regression (MLR) method were employed. The statistical results suggested that the DN parameter of the solvent plays a dominate contribution to the shift of the d-d absorption band of the complexes.
authors: Department of Chemistry, University of Mazandaran, Babol-sar 47416-95447, Iran. h.golchobian@umz.ac.ir
authors: Hamid
authors: H
authors: Golchoubian
authors: Golasa
authors: G
authors: Moayyedi
authors: Hakimeh
authors: H
authors: Fazilati
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D003959:Diamines / Q000737:chemistry; D006885:Hydroxybutyrates / Q000737:chemistry; D016014:Linear Models; D010422:Pentanones / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D056831:Coordination Complexes; D003959:Diamines; D006885:Hydroxybutyrates; D010422:Pentanones; D012997:Solvents; C049529:acetyl acetonate; D003300:Copper