Investigations on Structural, Optical, Mechanical, Thermal and Biological Properties of Pure and Crystal Violet Dye Doped L-Asparagine Single Crystals

Abstract

An organic material, L-asparagine monohydrate (LAM) is doped with crystal violet dye to enhance the host crystal's various characteristics. Slow evaporation has been used to create both pure and Crystal Violet-doped L-asparagine crystals.After 15 days, Pure L-asparagine crystals were produced and after 25 days, Crystal violet doped L-asparagine crystals were produced. Single crystal XRD evaluation has been used to determine the crystal system and unit cell dimensions. Pure L-Asparagine crystal was found to have orthorhombic crystal structure and CV doped LAM was found to have triclinic crystal structure. Using Powder XRD analysis, prominent peaks observed in the xrd pattern have been indexed in order to characterize its structure by evaluating the miller indices (hkl) values. UV-Vis Analysis has been done between 200 and 800 nm wavelength range. The band gap energy value for pure sample was found to be 4.88 eV and doping resulted in a larger energy band gap value as 4.97 eV and an enlarged transmittance window in the transmittance spectra. The pure and Crystal Violet doped LAM samples' linear optical characteristics have been assessed. The mechanical property of the generated crystals was assessed using the Vickers microhardness test. A number of mechanical characteristics of both pure and doped LAM crystals have been assessed, including the stiffness constant, yield strength, brittleness index, and hardness number. The thermal stability of the produced crystal was understood using the thermal analysis technique. Four strains of Pseudomonas aeruginosa, Klebsiella pneumonia, Streptococcus mutans, and Staphylococcus aureus were used to investigate the antibacterial activity using the Agar disk diffusion test. The samples Pure LAM and Crystal Violet doped LAM were found to have the highest activity of 22 mm against Streptococcus mutans. As a result, the produced samples were discovered to have numerous uses in the fields of biomedicine, water purification, and electro-optics.