Abstract
Single crystals of pure and Li+ doped L-citrulline oxalate (LCO) crystals are grown successfully by slow evaporation technique. The effect of lithium doping on crystal properties has been studied. The samples are characterized by X-ray powder diffraction, TGA, FTIR, Raman and UV-Vis spectroscopic techniques. The presence of lithium in Li+ doped LCO crystals is estimated using AES. The thermal stability and the optical transparency region are found to be enhanced for the doped samples. The second harmonic generation efficiency of the doped crystal has improved considerably compared to pure L-citrulline oxalate. Lithium doping can hence be considered as a simple and advantageous technique to improve the thermal, optical and non linear optical (NLO) properties of the LCO single crystals.
Highlights
Nonlinear optical (NLO) organic materials are of current interest owing to their wide applications in the domain of optoelectronics and photonics
L-citrulline oxalate has already been identified as a promising organic nonlinear optical material [12,13]
The present work reveals the influence of lithium doping on the growth and properties of L-citrulline oxalate (LCO) single crystals
Summary
Nonlinear optical (NLO) organic materials are of current interest owing to their wide applications in the domain of optoelectronics and photonics. Most of the organic NLO crystals are constituted by weak van der Waals bonds and hydrogen bonds. They have poor mechanical and thermal properties. It has been reported that SHG efficiency can be greatly enhanced by altering the molecular alignment through inclusion complexation [8] literature survey on lithium doped materials show that many of the inherent properties of amino acid based materials can be modified by the doping of lithium ions. The present work highlights the advantageous effects of lithium doping on the optical and nonlinear properties of L-citrulline oxalate crystals
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