EPR and optical absorption studies of Cu2+ doped L-arginine phosphate monohydrate single crystals--part II.
The EPR spectra of Cu2+ ion in L-Arginine phosphate monohydrate (LAP) at X-band frequencies at room temperature reveal the presence of two magnetically inequivalent interstitial Cu2+ sites in the lattice. The principal values of the g- and A-tensors indicate rhombic symmetry around the Cu2+ ion. From the direction cosines of the principal values of the g- and A- tensors, the orientations of the sites in the lattice have been identified. The bonding parameters were evaluated and the ground state wave function of Cu2+ ion was constructed. The ground state is found to be an admixture of [x2 - y2> and [3z2 - r2> orbitals. The optical absorption studies show four bands centered at 9803, 10753, 15748 and 16666 cm(-1) confirming the rhombic symmetry around the Cu2+ ion. Using the observed bands the crystal field parameters have been evaluated.
Angeli Mary
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PA
Department of Physics, Bharathidasan University, Tiruchirapalli, India.
Dhanuskodi
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D001120:Arginine / Q000737:chemistry*; D055592:Biophysical Phenomena; D001703:Biophysics; D002244:Carbon / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D003460:Crystallization; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D007477:Ions; D010100:Oxygen / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*
D007477:Ions; D002244:Carbon; D003300:Copper; D001120:Arginine; D010100:Oxygen