Crystal growth and characterization of dibromo bis(triphenylphosphine oxide) cadmium (II)

Single crystals of semi-organic nonlinear optical material, dibromo bis(triphenylphosphine oxide) cadmium(II) (CdBr2(TPPO)2) were grown by low temperature solution growth method. The synthesized material was purified by the process of repeated recrystallization. Prepared compound was confirmed using Fourier transform infrared and proton NMR spectral analyses. The unit cell dimensions were determined by single crystal X-ray diffraction studies. Single crystal X-ray diffraction study shows that CdBr2(TPPO)2 crystallizes in the triclinic system. The grown crystal was characterized by UV–vis–NIR and micro hardness studies. The thermal stability of CdBr2(TPPO)2 was estimated from the thermogravimetric and differential thermal analyses. The second harmonic generation efficiency of powdered CdBr2(TPPO)2 was determined for CdBr2(TPPO)2 by the Kurtz and Perry method and is ∼1.2 times that of potassium dihydrogen phosphate.