Structural, Optical and Dielectric Characterization of Guanidine Acrylate (GuAcr) NLO Single Crystals

Abstract

Organic single crystal of Guanidine Acrylate (GuAcr) was grown by simple inexpensive slow evaporation technique. The grown crystal was subjected into various characterizations like single crystal XRD, UV-Vis, FTIR studies, electrical, mechanical properties and SHG technique. The XRD data shows that the crystal belongs to orthorhombic structure. The UV-Vis spectral studies observed that the cutoff wavelength of the grown crystal is 320nm. Optical band gap of the grown crystal was also calculated, and it was found to be 3.99 eV. Vibrational frequencies of GuAcr crystal were confirmed by FTIR spectra. Electrical properties of the GuAcr single crystals were studied using impedance spectroscopy. Decreasing impedance with increasing temperature is indicated that the negative temperature co-efficient of resistance behavior like an insulator. Dielectric response of the crystal with varying frequencies was also studied. Second harmonic generation of the title compound was studied using Kurtz Perry- powder SHG technique. It reveals that as grown crystal is suitable for Nonlinear Optical (NLO) device fabrications.

Antibacterial Activities of Guanidine Family Single Crystals against Bacillus Subtilis and Staphylococcus Aerus

“…In the present study, we have developed guanidine-based organic single crystals and assessed their antibacterial activities against standard strains of pathogenic bacteria's like Bacillus subtilis and Staphylococcus aerus in order to address the antiseptic stability of guanidine derivatives. In continuation of our previous studies [5][6][7][8] in Guanidine compounds, we report here the synthesis and antibacterial activity of Guanidine derivatives which was prepared as a single crystal in the reaction of Guanidine carbonate admixture aminoacids like tartaric acid, acetic acid, maleic acid, acrylic acid and tetrafluroboric acid in absolute solvent upon low temperature solution growth technique. From that, the Guanidine tartarate (Guhtt), Guanidine acetate (GuAce), Guanidine maleate (Gumlt), Guanidine acrylate (GuAcr) and Guanidine tetrafluroborate (Gutfb) single crystals are harvested.…”