An initial study of the growth and defect analysis on hydrated 2-benzoyl benzoic acid crystal

In the present study, single crystals of hydrated 2-benzoyl benzoic acid were grown by the slow evaporation solution growth method. Single crystal and powder X-ray diffraction studies confirm the triclinic structure of the grown crystals. The defect in crystalline perfection has been defined by rocking curve analysis. The FTIR spectrum of the crystal displays carbonyl stretching of the carboxylic group at 1685 cm⿿1 and of keto group at 1661 cm⿿1. It shows a merged medium band around 3450 cm⿿1 due to OH stretching and does not distinguish clearly between OH of COOH and H2O held up in the crystal. The existence of additional bands appears at 1590 cm⿿1 due to vibration of H2O in the compound. The photoluminescence excitation studies were carried out for the grown crystals for wide wavelength range between 300 nm and 700 nm at room temperature. The range of percentage of optical absorption of the crystal has been ascertained by UV⿿vis spectral characterization. The mechanical strength has been determined by Vickers's microhardness measurement for different loads with constant dwell time.