title: Investigation on growth, structure and characterization of succinate salt of 8-hydroxyquinoline: an organic NLO crystal.
abstract: 8-Hydroxyquinolinium succinate (8-HQSU) has been synthesized and single crystals were grown from ethanol solvent by employing the technique of slow evaporation at room temperature. The structure of the grown crystal has been elucidated by single crystal X-ray diffraction analysis. It reveals that 8-HQSU crystallizes in monoclinic system with non-centro symmetric space group P2(1). FTIR, 1H and 13C NMR spectral investigations have been carried out to identify the vibrational modes of various functional groups and placement of proton and carbon in the 8-HQSU compound, respectively. UV-vis-NIR transmission spectrum shows the cutoff wavelength around 357 nm. In addition, a photoluminescence spectral analysis was carried out for 8-HQSU crystals. The thermal properties of crystals were evaluated from TGA and DTA techniques and the crystal was found to be stable up to 145°C. The dielectric studies show that the dielectric constant and dielectric loss decrease exponentially with frequency at different temperatures. Photoconductivity studies were carried out on the grown crystals it reveals the positive photo conducting nature. Powder second harmonic generation property of the crystal was confirmed by Kurtz and Perry powder SHG technique and it is found to be 1.3 times greater than that of KDP.
authors.affiliation: Department of Physics, School of Physics, Madurai Kamaraj University, Madurai 625021, Tamilnadu, India.
authors.forename: R
authors.initials: R
authors.lastname: Thirumurugan
authors.affiliation: Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641020, Tamilnadu, India.
authors.forename: B
authors.initials: B
authors.lastname: Babu
authors.affiliation: Department of Physics, School of Physics, Madurai Kamaraj University, Madurai 625021, Tamilnadu, India. Electronic address: singlecrystalxrd@gmail.com.
authors.forename: K
authors.initials: K
authors.lastname: Anitha
authors.affiliation: Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641020, Tamilnadu, India.
authors.forename: J
authors.initials: J
authors.lastname: Chandrasekaran
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D004055:Differential Thermal Analysis; D008958:Models, Molecular; D015125:Oxyquinoline / Q000737:chemistry*; D019802:Succinic Acid / Q000737:chemistry*; D013818:Thermogravimetry
chemical_list: D015125:Oxyquinoline; D019802:Succinic Acid
keywords: Crystal growth; Dielectric constant; Nonlinear optical materials; Single crystal X-ray diffraction; Thermal analysis