Spectroscopic Investigations of Mn (II) Doped Ni L-Histidine Hydrochloride Monohydrate Crystals
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 6
Abstract
The main focus of this work had been to grow good quality crystals from amino acids and amino acid based materials for spectroscopic applications. Growth of crystals from aqueous solution is one of the methods of crystal growth which is extremely popular in the production of technologically important crystals. For the first time, Mn(II) doped Ni L-Histidine Hydrochloride monohydrate, Mn-NiLHICL crystals were grown from aqueous solution at room temperature by slow evaporation technique. The Mn(II) doped crystals were characterized by spectroscopic techniques such as X-Ray diffraction studies, Electron Paramagnetic Resonance(EPR), Optical absorption and FTIR studies. From the powder diffraction patterns of the grown crystals, lattice cell parameters were evaluated, a = 1.5186 nm, b = 0.8917 nm and c = 0.6889 nm. Values calculated from EPR studies for ‘g’ and Hyperfine Splitting factor for Mn(II) ion in the host crystal, g = 2.071, A= 103 x 10-4 cm-1 indicated octahedral symmetry. Optical absorption studies confirmed the octahedral symmetry of Mn(II) ions in the host crystal. Crystal field and inter electronic parameters were evaluated for Mn2+ ion as Dq = 855cm-1, B = 810 cm-1and C = 2480 cm-1. Characteristic vibrations of the structure in the crystal confirmed the nature of bonding between the doped metal ion and the amino acid complex.
Authors and Affiliations
P. N. V. V. L. Rani
Keywords
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