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J. G. Qin , D. Y. Liu , C. Y. Dai, C. T. Chen, B. C. Wu, C. L. Yang and C. M. Zhan, “Influence of the Molecular Configuration on Second-Order Nonlinear Optical Properties of Coordination Compounds,” Coordination Chemistry Reviews, Vol. 188, No. 1, 1999, pp. 23-34. doi:10.1016/S0010-8545(98)00182-9

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• TITLE: Growth, Crystal Structure and Characterization of a New Single Crystal: Lithium Sodium Acid Phthalate (LiNaP), for Third Order Nonlinear Optical Applications

  AUTHORS: B. Sivakumar, S. Gokul Raj, G. Ramesh Kumar, R. Mohan

  KEYWORDS: Single Crystal X-Ray Diffraction; FTIR Analysis; UV-Vis-NIR Spectroscopy; Thermal Analysis; Nonlinear Optical Materials; Third-Order Nonlinearity; Z-Scan

  JOURNAL NAME: Journal of Crystallization Process and Technology, Vol.2 No.4, October 17, 2012

  ABSTRACT: A new alkali metallo-organic single crystal of Lithium Sodium Acid Phthlate (LiNaP) complex has been synthesized from aqueous solution in the equimolar ratio 3:1:2. Transparent and bulk single crystals of dimension 9 × 4 ×2 mm3 have been grown from the conventional slow-cooling technique. The crystal structure of the compound has been solved from single crystal X-ray diffraction. The compound 2[C8H4O3]4-Li3+Na+ crystallizes in triclinic system with a space group of Pī having cell dimensions a = 7.5451(2) ? b = 9.8422(3) ? c = 25.2209(7) ? α = 80.299(2); β = 89.204(2); γ = 82.7770(10). FTIR measurement was carried out fo? LiNaP to study the vibrational structure of the compound. The various functional groups present in the molecule and the role of H-bonds in stabilizing the crystal structure of the compound have been explained. Optical absorption properties were studied for the grown crystal using UV-Vis-NIR spectrum. Thermal measurements were carried out for LiNaP to determine the thermal strength as well as to ascertain the hydrated nature of the crystal. Third order nonliner optical studies have also studied by Z-scan techniques. Nonlinear absorption and nonlinear refractive index were found out and the third order bulk susceptibility of compound was also estimated. The results of all studies have been discussed in detail.