Determination of bond length from EXAFS spectra of some copper(II) mixed ligand complexes

Jaishree Bhale¹ , Pradeep Sharma² , A. Mishra³ , Neetu Parsai⁴

Section:Research Paper, Product Type: Isroset-Journal
Vol.3 , Issue.3 , pp.1-3, May-2015

Online published on Nov 19, 2015

Copyright © Jaishree Bhale, Pradeep Sharma, A. Mishra, Neetu Parsai . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
X-ray absorption spectra at the K-edge of copper have been studied in two copper mixed ligand complexes having P-methoxybenzaldehyde as one of the ligands. Copper(II) complexes of two previously prepared ligands L1=(P-methyl anilino)- P-methoxy phenyl acetonitrile and L2 =(P-methoxy anilino)-P- methoxy phenyl acetonitrile were synthesized. The two ligands were prepared which included the reaction of P-methoxybenzaldehyde with P-toluidine and P-anisidine respectively. The complexes are : [Cu(L1)2](NO3)2 and [Cu2(L2)2(H2O)8](NO3)2 in which P-methoxybenzaldehyde has been used as primary ligand and P-toluidine and P-anisidine have been used as secondary ligands. The X-ray absorption spectra have been recorded at BL-8 Dispersive Extended X-ray Absorption Fine Structure (EXAFS) beamline at the 2.5-GeV INDUS-2 Synchrotron Source, RRCAT, Indore, India. The normalized EXAFS spectra have been Fourier transformed. EXAFS maxima and minima positions have been obtained. The bond length have been determined using four different methods, i.e., Levy’s, Lytle , Lytle, Sayers and Stern’s (LSS) and Fourier transformation methods. Both LSS and Fourier transformation methods give phase uncorrected bond lengths and hence results obtained from them have been compared with each other. The data obtained has been processed using EXAFS data analysis program Athena.

Key-Words / Index Term :
Copper complexes, EXAFS, Athena, RRCAT, LSS

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