V.S. Dhanya

Spectral, thermal, structural, dielectric and microhardness studies of gel grown diaquasuccinatocadmium(II) hemihydrate

Diaquasuccinatocadmium(II) hemihydrate (DSCH) single crystals were grown successfully by single gel diffusion technique at room temperature. Block shaped crystals of size 11 mm × 6 mm × 3 mm have been obtained in 24 days. The grown crystals were colorless and transparent. The crystalline nature and reflection planes of the sample were confirmed by the powder X-ray diffraction technique. The crystal structure of the DSCH crystal was determined by single crystal X-ray diffraction technique. According to microanalytical results the formula of the crystal is [Cd(C(4)H(4)O(4))H(2)O](2)·0.5H(2)O. Fourier Transform Infrared (FT-IR) and Fourier Transform Raman (FT-Raman) studies were used to confirm the presence of various functional groups in the crystal. The thermal behavior of the crystal was studied by simultaneous TGA-DTA methods in nitrogen atmosphere. The mechanical strength of the grown crystal was estimated by Vickers microhardness test. The dielectric behavior of the sample was also studied.

Growth, spectral and thermal studies of an efficient NLO material: Diaquadicinnamatocadmium(II)

A nonlinear metal–organic crystal, diaquadicinnamatocadmium(II) has been grown by controlled gel diffusion technique. Sodium metasilicate was used to prepare the gel. The chemical composition of the crystal has been determined by CHN analysis. Powder X-ray diffraction studies confirm the crystalline nature of the grown crystal. Functional groups present in the compound were identified by FT-IR spectral analysis. The thermal decomposition of the compound was studied using thermogravimetry (TG). The optical transparency range and the lower cut-off wavelength were identified from the UV-Visible-NIR spectrum. The NLO activity of the grown crystal was confirmed using Kurtz and Perry powder test.