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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(07) [July 2005] >
| Title: | X-ray K-absorption fine structure studies on some copper(II) complexes |
| Authors: | Vyas, R K
Joshi, S K
Shrivastava, B D
Shah, M C
Prasad, J |
| Keywords: | X-ray K-absorption spectra
Copper (II) complexes
Backscattering shift |
| Issue Date: | Jul-2005 |
| Publisher: | CSIR |
| IPC Code: | G01J3/28 |
| Abstract: |
The X-ray
K-absorption spectra of copper and arsenic in complexes [Cu(
φ3AsO)2X2] and [Cu(
φ3PO)2X2], where X = Cl or
Br and
φ = C6H5, have
been studied using a 40 cm bent crystal spectrograph. Various X-ray absorption
parameters such as edge shift, phase parameters and bond-distances have been
estimated. Our studies reveal that triphenylarsine oxide is a better s-donor than triphenylphosphine oxide. The
splitting of the main edge K into K1 and K2
components have been explained. The existence of the white line have been
attributed to the transition of K-electrons into a high density of normally
unoccupied states with p symmetry in the neighbourhood of the copper or arsenic
atom. Further, our studies on phase shift determination indicate that variation
in the first or second coordination environment around the central absorbing
atom has a dominant effect on the values of backscattering phase shifts.
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| Page(s): | 509-516 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.43(07) [July 2005]
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