title: EPR and optical absorption studies of Cr3+ ions in d-gluconic acid monohydrate.
abstract: EPR studies are carried out on Cr(3+) ions doped in d-gluconic acid monohydrate (C(6)H(12)O(7)*H(2)O) single crystals at 77 K. From the observed EPR spectra, the spin Hamiltonian parameters g, |D| and |E| are measured to be 1.9919, 349 (x 10(-4)) cm(-1) and 113 (x 10(-4)) cm(-1), respectively. The optical absorption of the crystal is also studied at room temperature. From the observed band positions, the cubic crystal field splitting parameter Dq (2052 cm(-1)) and the Racah interelectronic repulsion parameter B (653 cm(-1)) are evaluated. From the correlation of EPR and optical data the nature of bonding of Cr(3+) ion with its ligands is discussed.
authors: EPR Laboratory, Department of Physics, University of Allahabad, Allahabad, India. ram kripal2001@rediffmail.com
authors: Ram
authors: R
authors: Kripal
authors: Pragya
authors: P
authors: Singh
authors: Har
authors: H
authors: Govind
mesh_terms: D002857:Chromium / Q000032:analysis*; D003460:Crystallization; D004578:Electron Spin Resonance Spectroscopy; D005942:Gluconates / Q000737:chemistry*; D007477:Ions / Q000032:analysis
chemical_list: D005942:Gluconates; D007477:Ions; D002857:Chromium; C030691:gluconic acid