Synthesis, characterization and anti-microbial activity of pure, Cu²⁺ and Cd²⁺ doped organic NLO l-arginine trifluoroacetate single crystals

Abstract

Optically transparent Cu2+ and Cd2+ doped l-arginine trifluoroacetate (LATF) single crystals were grown from its aqueous solution using the slow solvent evaporation technique. The grown crystals were characterized by powder x-ray diffraction to confirm the monoclinic crystal structure. The percentage of transmittance measured using the ultraviolet–visible–near infrared spectrophotometer was found to be more than 80% for doped crystals. The functional group analysis of the grown crystals has been made by Fourier transform infrared spectroscopy. Thermogravimetric/differential thermal analysis was performed for the grown crystals. An atomic absorption study was carried out to determine the presence of Cu2+ and Cd2+. The hardness of the grown crystals was assessed and the results show a significant variation in the hardness value between the pure and doped LATF crystals. The second harmonic generation measurements show that Cu2+ doped LATF is 2.8 times greater and Cd2+ doped is 2.6 times greater than KDP. The anti-bacterial and anti-fungal activities of the title compound were performed using the disc diffusion method against standard bacteria Escherichia coli, Xanthomonas oryzae and against the fungus Aspergillus niger and Aspergillus flavus.

Investigations on the Effect of Amino Acid Doping on the Growth and Characterization of Alkali Metal Acid Phthalate Single Crystals.

“…Apart from this LT-NaAP crystal is best suited in the NLO and optoelectronic device fabrications. Antibacterial Analysis:-The antibacterial activity of the undoped NaAP (S1), LA-NaAP (S2) and LT-NaAP (S3) was carried out by the well diffusion method against the bacterial strains of S. pneumonia, E. coli and K. pneumonia on Mueller hinton agar, according to the Clinical and Laboratory Standards Institute (CLSI) [30]. The media plate's Mueller hinton agar (MHA) was streaked with bacteria 2-3 times by rotating the plate at 60˚ angles for each streak to ensure the homogeneous distribution of the inoculums.…”

Optical, thermal and electrical properties of pure and doped bis-thiourea cadmium formate (BTCF) crystal

“…The doped BTCF crystal shows high transmittance and a lower cut-off wavelength (245 nm) than the pure BTCF crystal. The high transparency window and lower cut-off wavelength of the doped BTCF crystal indicates its suitability for SHG device applications [15]. The optical absorption coefficient (α) is determined using the equation α = 2.303 log (1/T)/t [16].…”