title: Ethylenediaminium di(4-nitrophenolate): a third order NLO material for optical limiting applications.
abstract: Single crystals of ethylenediaminium di(4-nitrophenolate) [EDA4NP] were grown by slow evaporation solution growth technique using ethanol as solvent at constant temperature. It crystallizes in monoclinic centrosymmetric space group C2/c with cell dimension a=11.326Ǻ, b=7.264Ǻ, c=20.036Ǻ; β=93.55°. Fourier Transform Infra Red (FT-IR) spectrum was recorded to identify various functional groups present in EDA4NP. Nuclear Magnetic Resonance (NMR) spectral studies were performed to confirm the functional groups. Thermogravimetric analysis and differential thermal analysis showed that the compound melts at 142.9°C. The material possesses a wide optical transparency window in the visible and near IR region (500-1200nm). The nonlinear refractive index, nonlinear absorption coefficient and third-order nonlinear susceptibility of EDA4NP were estimated to be n2=5.46×10(-8)cm(2)W(-1), β=0.65×10(-3)cmW(-1) and χ((3))=2.96×10(-6)esu respectively. The limiting behavior observed with the sample is attributed mainly to nonlinear refraction.
authors.affiliation: Department of Physics, Alagappa University, Karaikudi 630004, India; Department of Physics, PSNA College of Engineering and Technology, Dindigul 624622, India.
authors.forename: M
authors.initials: M
authors.lastname: Thangaraj
authors.affiliation: Department of Physics, Alagappa University, Karaikudi 630004, India. Electronic address: raviganesa@rediffmail.com.
authors.forename: G
authors.initials: G
authors.lastname: Ravi
authors.affiliation: School of Physics, Bharathidasan University, Tiruchirappalli 620024, India.
authors.forename: T C
authors.initials: TC
authors.lastname: Sabari Girisun
authors.affiliation: Division of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT), Chennai 600127, India.
authors.forename: G
authors.initials: G
authors.lastname: Vinitha
authors.affiliation: Engineering Physics, Annamalai University, 608002, India.
authors.forename: A
authors.initials: A
authors.lastname: Loganathan
mesh_terms: D003460:Crystallization / Q000379:methods; D018360:Crystallography, X-Ray; D004055:Differential Thermal Analysis; D009682:Magnetic Resonance Spectroscopy; D009596:Nitrophenols / Q000737:chemistry*; D017711:Nonlinear Dynamics; D012031:Refractometry; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry
chemical_list: D009596:Nitrophenols
keywords: NMR; Optical limiting; Organic material; Solvent evaporation; Third order NLO; Z-scan