Synthesis, growth, structure, and characterization of a novel semiorganic crystal

Single crystals of (chloro)tris(thiourea-kappa S)cadmium(II) picrate have been grown by slow evaporation of a mixed solvent system water-acetone containing thiourea, cadmium chloride, and picric acid. The yellow crystals belong to triclinic system with centrosymmetric space group P-1 and the corresponding lattice parameters are a = 7.4632(3) C-0, b = 7.9567(3) C-0, c = 17.4885(7) C-0, alpha = 98.990(2)A degrees, beta A = 100.137(2)A degrees, gamma A = 95.275(2)A degrees, and Z = 2. The vibrational patterns of the as-grown crystals are analyzed by FT-IR and FT-Raman spectral analyses. The optical absorption study was performed to analyze the optical transparency of CTTCP and the crystals were transparent in the visible region and have a lower optical cutoff at similar to 507 nm with band gap energy of 2.47 eV. TG-DTA thermal analysis shows that the crystal is stable up to similar to 208 A degrees C and has a good chemical stability.