Investigation on Structural, Optical and Thermal Properties of Diphenyl Urea—An Organic Non-Linear Optical Crystal

Jaishree Damodharan¹, Kanchana Gopinath², Kesavasamy Ramasamy³

¹Department of Physics, Sri Ramakrishna Institute of Technology, Coimbatore, India.
²Department of Physics, Government Arts College, Coimbatore, India.
³Department of Physics, Sri Ramakrishna Engineering College, Coimbatore, India.

DOI: 10.4236/jmmce.2015.32007                

Abstract

Organic non-linear optical crystal diphenyl urea with molecular formula C₁₃H₁₂N₂O was synthesized and grown successfully by slow evaporation solution growth technique. The single crystal X-ray diffraction (XRD) confirms that it crystallizes in orthorhombic crystal system with non-centrosymmetric space group Pna21. The various functional groups were identified qualitatively by Fourier transform-infra red (FT-IR) and FT-Raman techniques. The electron absorption spectrum was studied by UV-Vis spectrophotometer. Thermal behavior of the crystal was evidenced by thermogravimetric (TG) and differential scanning calorimetric (DSC) analyses. From DSC the melt ing point of the crystal is found to be 145°C. The existence of second harmonic generation (SHG) signal was evidenced using Kurtz Perry powder test and the efficiency of the crystal was found to be 0.64 times that of the standard KDP crystal.

Keywords

Non-Linear Optical Crystal, Slow Evaporation Technique, Characterization

Conflicts of Interest

The authors declare no conflicts of interest.

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