Systematic discussion on nonlinear optical and antibacterial activity of guanidinium benzene-1,2- dicarboxylate (GUBD) single crystal for laser and biomedical applications

摘要

The present article is focused to probe guanidinium benzene-l,2-dicarboxylate (GUBD) crystal synthesized by slow evaporation technique. The synthesized material possesses centrosymmetric structure with Pbcn space group having orthorhombic crystal system. The inter-contacts of the synthesized material have been investigated using Hirshfeld surface analysis and it clearly visualizes that the intermolecular hydrogen bonding takes place for structural stabilization. The functional groups of synthesized material have been affirmed from FT-IR and FT-Raman spectra. GUBD possess cut-off edge at 250 and 272 nm with high optical transparency in the visible-NIR region. The T/G and DTA show studied compound is thermally stable up to 300 °C. The observation of maximum intensity peak for the GUBD crystal at 570 nm pointed out green fluorescence emission. The Vicker's hardness analysis reveals reverse indentation size effect. Dielectric studies of the GUBD crystal were measured. The nonlinear optical measurements on GUBD material confirm the two-photon absorption with reverse saturable absorption behavior and the crystal is potentially sufficient for optical limiting-based laser safety devices. The antibacterial activities of GUBD crystal against strains Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus have been analyzed. Furthermore, the grown GUBD crystal finds potential application in the field of electro-optic device and pharmaceutical applications.