Synthesis, structural, vibrational, thermal, dielectric and optical properties of third order nonlinear optical single crystal for optical power limiting applications.

A new metal-organic NLO single crystal of 2-Aminopyridinium bis[hexaaqua(cobalt(II)) sulfate] monohydrate (2APCS) has been obtained by the reaction of aqueous solution of 2-Aminopyridine and cobalt(II) sulfate heptahydrate and by room temperature slow evaporation process. Single crystal X-ray diffraction study of the grown single crystal confirms the P 1 ¯ space group of a triclinic structure. The crystalline molecules are stabilized by elaborate O H⋯O and N H⋯O classical three dimensional hydrogen bonding network. The functional groups in the 2APCS were established by the FT-IR and Laser Raman spectroscopy. The obtained crystals were also characterized for thermal stability, dielectric, optical and nonlinear optical properties. Z-Scan technique was employed to observe the third order nonlinear optical susceptibility and was observed to be high. The optical limiting behaviour of the grown crystal is recognized mainly to nonlinear refraction. A new organometallic NLO single crystals of 2-Aminopyridinium bis[hexaaqua (cobalt(II)) sulfate] monohydrate was synthesized by slow evaporation method and the molecular structure was confirmed by single crystal X-ray diffraction study. From Z-scan study, nonlinear refractive index, nonlinear absorption and third order nonlinear susceptibility values were calculated. The optical limiting behaviour observed with the crystal is attributed mainly to nonlinear refraction. Image 1070 • A new metal-organic single crystals of 2-Aminopyridinium bis [hexaaqua(cobalt(II)) sulfate] monohydrate has been grown by slow evaporation solution growth technique. • The structure is reported for the first time in the literature. • The optical quality and thermal stability of the 2APCS crystal was studied by UV–Vis–NIR and TG/DTA. • The electrical conductivity, dielectric loss and dielectric constant have been investigated. • The grown crystal exhibited high third order optical nonlinearity which was determined by Z-Scan technique. [ABSTRACT FROM AUTHOR]