Record Details

Synthesis and characterization of 3d and 4f metal complexes of Schiff base ligands

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Synthesis and characterization of 3d and 4f metal complexes of Schiff base ligands
 
Creator UPADHYAY, A
VAIDYA, S
VENKATASAI, VS
JAYAPAL, P
SRIVASTAVA, AK
SHANMUGAM, M
SHANMUGAM, M
 
Subject Schiff base
Lanthanide ion
Transition metal complex
EPR
DFT and TD-DFT calculations
SINGLE-MOLECULE-MAGNET
TARGETED STRUCTURAL DISTORTION
ION MAGNETS
COPPER(II) COMPLEXES
NICKEL(II) COMPLEXES
ANISOTROPIC BARRIER
RELAXATION
SPIN
MAGNETIZATION
BEHAVIOR
 
Description Square planar complexes of monomeric [Cu(L1)(2)] (1) and [Ni(L1)(2)] (2) (where L1 is C20H24NO2) are isolated through the use of Schiff base ligands and characterized by X-ray diffraction, UV-Vis, electron paramagnetic resonance (EPR) and DFT calculations. Effects of coordinating and non-coordinating solvent for 1 and 2 (UV-Vis) were studied in detail. The EPR spectra recorded for 1, confirms the rhombic nature of Cu(II) ion of 1 in the solid state, g = [2.185, 2.086, 2.036], and frozen fluid with the spin Hamiltonian parameters, g = [2.207, 2.079, 2.040]. The slight deviation in the g-tensor of 1 from its powder to frozen solution is attributed to the loss of intermolecular hydrogen bonding in fluid solution. UV-Vis (for 1 and 2) and EPR (for 1) parameters obtained from DFT calculations are consistent with the experimental data, and further confirms that the solid state structures of 1 and 2 are maintained in solution. Crystal structures of praseodymium and lanthanum monomeric complexes obtained with HL2 (C14H11NO2) are also reported. The X-ray crystal structure of the praseodymium complex solved in an orthorhombic crystal system with molecular formula [Pr(HL2)(2)(NO3)(3)] (3), whereas lanthanum in a triclinic system with molecular formula [La(HL2)(3)(NO3)(3)] (4) with multiple intermolecular hydrogen bonds. Complexes 3 and 4 are found to be in distorted bicapped square anti-prism and Icosahedron geometries respectively. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-14T13:15:50Z
2014-10-14T13:15:50Z
2013
 
Type Article
 
Identifier POLYHEDRON, 6687-96
http://dx.doi.org/10.1016/j.poly.2013.02.039
http://dspace.library.iitb.ac.in/jspui/handle/100/14496
 
Language en