Growth and characterization studies of pure and tartaric acid doped benzilic acid crystals

• Published in: Journal of crystal growth 2016-04, Vol.440, p.17-25
• Main Authors: Gilda, M.J. Jarald Brigit, Devarajan, Prem Anand
• Format: Article
• Language: English
• Subjects: A1. Crystal structure; A1. X-Ray diffraction; A2. Growth from solutions; B1. Organic compounds; B2. Nonlinear optical materials; Benzilic acid; Crystals; Networks; Phosphates; Single crystals; Spectra; Tartaric acid; Thermal properties
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2016.01.028

The organic nonlinear optical crystals of pure benzilic acid (PBA) and tartaric acid doped benzilic acid (TADBA) single crystals were grown by using slow evaporation method utilizing dimethyl formamide (DMF) as a solvent. Transparent single crystals of PBA and TADBA of dimensions 9×4×1mm3 and 7×5×2mm3 were grown after thirty days. Lattice parameters and space groups of PBA and TADBA were evaluated using single crystal X-ray diffraction analysis. Employing Fourier transform infrared spectral analysis, various functional groups in pure and doped crystals were ascertained. 1H and C13 nuclear magnetic resonance spectral analysis suggests the presence of hydrogen- and carbon-bonded network. Optical transparency of PBA and TADBA was investigated using ultraviolet-visible (UV–vis) spectral analysis whereas thermal properties of the grown crystals were studied by thermogravimetric and differential scanning calorimetry analyses. Second harmonic generation efficiency of PBA and TADBA was found to be 2.2 and 2.7 times higher than that of potassium dihydrogen phosphate. •Single crystals of pure and tartaric acid doped benzilic acid were grown.•Functional groups of both crystals were analyzed by using FTIR spectrum.•Molecular structure of both crystals was confirmed by NMR spectral analysis.•High optical transparency reveals its suitability for second harmonic generation.•Enhanced SHG efficiency for tartaric acid doped benzilic acid single crystal.