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.
Highlights
Crystalline Phthalic acid complexes have been subjected to extensive investigations by several researchers so as to study about their linear and nonlinear optical properties
The unit cell dimensions and X-ray intensity data of LiNaP was obtained on a Enraf Nonius CAD 4 Bruker Kappa APEX II single crystal X-ray diffractometer equipped with MoKα radiation (λ = 0.71073 Å). ω/2θ scan mode was employed for data collection [19]
The crystal structure is composed of potassium, sodium cations and hydrogen phthalate molecules of crystallization
Summary
Crystalline Phthalic acid complexes have been subjected to extensive investigations by several researchers so as to study about their linear and nonlinear optical properties. The crystallographic data for many phthalic acid complexes exists in the literature are the salts of Potassium Acid Phthalate (KAP), Sodium Acid Phthalate (NaAP), Lithium Acid Phthalate (LiAP) [12,13,14]. All of these compounds are stabilized by extensive networks of hydrogen bonds. The influence of strong and weak hydrogen bonds on the nonlinear behaviour of the crystals have already been studied earlier [15]. Phthalate samples of sodium and potassium are promising third-order NLO materials for applications in optical devices. [16,17,18]
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