title: Structural, thermal and optical characterization of a Schiff base as a new organic material for nonlinear optical crystals and films with reversible noncentrosymmetry.
abstract: Macroscopic single crystals of (E)-5-(diethylamino)-2-((3,5-dinitrophenylimino)methyl)phenol (DNP) were obtained from slow cooling of chloroform or dichlorometane saturated solutions at controlled temperature. X-ray diffraction analysis showed that this compound crystallizes in a noncentrosymmetric space group (P2(1)2(1)2(1)). Thermal analysis was performed and indicated that the crystals are stable until 260 °C. Second-order nonlinear optical properties of DNP were experimentally investigated in solution through EFISH technique and in solid state through the Kurtz-Perry powder technique. Crystals of compound DNP exhibited a second-harmonic signals 39 times larger than of the technologically useful potassium dihydrogenphosphate (KDP) under excitation at infrared wavelengths. In addition, the second-order nonlinear optical properties of DNP were also studied at visible wavelengths through the photorefractive effect and applied to demonstrate dynamic holographic reconstruction.
authors.affiliation: Centro de Investigaciones en Óptica A.P. 1-948, 37000 León, Gto., Mexico.
authors.forename: Mario
authors.initials: M
authors.lastname: Rodríguez
authors.forename: Gabriel
authors.initials: G
authors.lastname: Ramos-Ortíz
authors.forename: José Luis
authors.initials: JL
authors.lastname: Maldonado
authors.forename: Víctor M
authors.initials: VM
authors.lastname: Herrera-Ambriz
authors.forename: Oscar
authors.initials: O
authors.lastname: Domínguez
authors.forename: Rosa
authors.initials: R
authors.lastname: Santillan
authors.forename: Norberto
authors.initials: N
authors.lastname: Farfán
authors.forename: Keitaro
authors.initials: K
authors.lastname: Nakatani
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D055095:Optics and Photonics; D012545:Schiff Bases / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D012545:Schiff Bases