Growth, characterization and optical limiting activity of third-order nonlinear optical material: hexaaqua cobalt (II) bis (p-Toluenesulfonate) (PTCO)

• Published in: Journal of materials science. Materials in electronics Vol. 33; no. 25; pp. 20424 - 20438
• Main Authors: Beena, J., Jebamalar, A. S., Sindhusha, S., Kamalesh, T.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2022; Springer Nature B.V
• Subjects: Acids; Ambient temperature; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt; Crystal lattices; Crystal structure; Defocusing; Functional groups; Lasers; Ligands; Materials Science; Molecular structure; Nonlinear optics; Nonlinearity; Optical and Electronic Materials; Optical materials; Optical properties; Photoluminescence; Single crystals; Sulfur trioxide; Surface analysis (chemical); Thermal stability; Toluene; Vibration
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-08858-7

Semi-organic nonlinear optical single crystals of Hexaaqua-Cobalt (II) bis (p-Toluene sulfonate) (PTCO) were grown by slow evaporation technique at ambient temperature. Single-crystal X-ray diffraction analysis reveals that PTCO belongs to the monoclinic crystal system with centrosymmetric space group P2 1 /n. Hirshfeld surface analysis manifests the NLO property of PTCO. FTIR analysis concludes the presence of CH 3 and SO 3 functional groups and the incorporation of water and cobalt in the crystal lattice. The UV–Vis–NIR studies and photoluminescence analysis corroborated the suitability of PTCO in various optical and NLO applications. Solid state parameters calculated using the dielectric constant ensure the higher third-order nonlinearity of PTCO. Title material exhibits the semiconducting behavior during the resistivity measurement, while heating. Thermal stability of PTCO up to 125 °C and mechanical stability were also studied. The self-defocusing and reverse saturable absorption of PTCO were studied by Z Scan analysis.