Crystal Research and Technology
Cryst. Res. Technol. 42, 180 (2007) - Abstract -

Growth and characterization of semi organic nonlinear optical LHPCL crystals

S. Aruna, M. Vimalan, P. C. Thomas, K. Thamizharasan*, K. Ambujam**, J. Madhavan, and P. Sagayaraj

Department of Physics, Loyola College, Chennai - 600 034, India
*Department of Physics, Sir Theagaraya College, Chennai, Chennai 600 021, India
**Department of Physics, Queen Mary’s College, Chennai-600 005, India

Keywords characterization, recrystallization, XRD, growth from solution, L-histidinium perchlorate, NLO
PACS 76.30.Fc
DOI 10.1002/crat.200610793

The growth of single crystals of L-histidinium perchlorate (LHPCL), a semi organic nonlinear optical material with dimension upto 5 x 6 x 2.5 mm3 is reported. Good optical quality single crystals were grown from aqueous solution by slow solvent evaporation technique. The grown crystals were characterized by single crystal X- ray diffraction (XRD), FT-IR and optical transmission studies. Thermal studies confirm that LHPCL has a fairly high thermal stability (272°C) when compared with other members of histidine family. The scanning electron microscopy (SEM) provides information on the quality of the samples and grain distribution over the surface of the sample. The dielectric constant and dielectric loss of the compound were measured at different frequencies, and also at varying temperatures and the results of these experiments are discussed.




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