Synthesis, growth and characterization of 2-carboxypyridinium hydrogen (2R,3R)-tartrate monohydrate: A new organic nonlinear optical crystal

Single crystals of 2-carboxypyridinium hydrogen (2R,3R)-tartrate monohydrate, an organic nonlinear optical material has been grown by slow solvent evaporation technique. The single crystal X-ray diffraction (XRD) data revealed the noncentrosymmetric crystal structure, which is an essential criterion for second harmonic generation. The crystalline nature of the grown crystals was confirmed using powder XRD technique. The functional group of the compound is identified by FTIR spectrum. The thermal stability has been identified for the new title compound. The UV–vis spectrum shows the lower optical cut off at 300 nm and transparent in the visible region. The second harmonic generation efficiency was found using Kurtz powder technique. The mechanical properties of the grown crystals have been studied using Vickers microhardness tester.