Growth and characterization of an organic NLO crystal: 1-(4-methylphenyl)-3-(4-methoxyphenyl)-2-propen-1-one (original) (raw)
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Growth and characterization of l-phenylalanine nitric acid, a new organic nonlinear optical material
Materials Letters, 2009
A new organic nonlinear optical material L-phenylalanine nitric acid [2C 9 H 11 NO 2 .H +. NO 3 − ] (LPN), was synthesized in mixed solvent of deionised water and methanol and single crystals of LPN was grown by slow evaporation method. Transparent crystals upto 2.9 × 0.3 × 0.05 cm 3 were obtained. The grown crystals have been subjected to powder X-ray diffraction studies to identify the crystalline nature. Single crystal X-ray diffractometer was utilized to measure unit cell parameters and to confirm the crystal structure. The modes of vibration of different molecular groups present in LPN were identified by FTIR spectral analysis. Transmission spectra reveals that the crystal has low UV cutoff of 295 nm and has a good transmittance in the entire visible region enabling its use in optical applications. Thermal properties of the crystals have been investigated using thermogravimetric (TG) and differential thermal analyses (DTA), which indicate that the material does not decompose before melting. The existence of second harmonic generation signals was observed using Nd:YAG laser with fundamental wavelength of 1064 nm.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2013
Single crystals of L-phenylalanine-benzoic acid (LPBA) were successfully grown from aqueous solution by solvent evaporation technique. Purity of the crystals was increased by the method of recrystallization. The XRD analysis confirms that the crystal belongs to the monoclinic system with noncentrosymmetric space group P21. The chemical structure of compound was established by FT-NMR technique. The presence of functional groups was estimated qualitatively by Fourier transform infrared analysis (FT-IR). Ultraviolet-visible spectral analyses showed that the crystal has low UV cut-off at 254 nm combined with very good transparency of 90% in a wide range. The optical band gap was estimated to be 6.91 eV. Thermal behavior has been studied with TGA/DTA analyses. The existence of second harmonic generation (SHG) efficiency was found to be 0.56 times the value of KDP. The dielectric behavior of the sample was also studied for the first time.
Structural, optical and electrical characteristics of a new NLO crystal
2012
A new nonlinear optical (NLO) organic crystal 1-[4-({(E)-[4-(methylsulfanyl) phenyl] methylidene} amino) phenyl] ethanone (MMP) has been grown by slow evaporation technique at ambient temperature. The crystal structure of MMP was determined by single crystal X-ray diffraction. MMP crystallizes in non-centrosymmetric monoclinic system with space group P21. The FT-IR spectrum recorded for new crystal confirmed the presence of various functional groups in the material.
Journal of Crystal Growth, 2010
In the past three decades, extensive theoretical and experimental investigations of the non-linear optical (NLO) properties of materials have attracted much attention because of their potential applications in the emerging optoelectronic technology [1, 2]. Recently there have been extensive efforts to develop new organic, inorganic and semi-organic NLO crystals. Semi organic materials possess several advantages compared with the traditional inorganic NLO materials like ADP, KDP, KTP, such as large second harmonic conversion efficiency, birefringence and dispersion of refractive index, which are finding increasing use in the development of new photonic devices. In
Organic nonlinearopticalsinglecrystalof1-(3-Nitrophenyl)-5-phenylpenta-2,4-dien-1-one(Ci3NC)with dimensions 251510 mm3 wassuccessfullygrownforthe first timebytheslowevaporationsolution growthtechnique(SEST).Thestructuralperfectionofthegrowncrystalshasbeenanalyzedbyhigh- resolution X-raydiffraction(HRXRD)rockingcurvemeasurements,anditwasfoundthatthecrystalline perfection isreasonablygoodhavingverylowangle(tiltangle r1′) internalstructuralgrainboundary. Thermo-gravimetricanalysis(TGA)anddifferentialthermalanalysis(DTA)wereusedtostudyitsther- mal properties.PowdertestwithNd:YAGlaserradiationshowssecondharmonicgenerationwhichis about 7timesthatofurea.Theopticaltransmittancewindowandthelowercutoffwavelengthofthe Ci3NC havebeenidentified byUV–vis–NIR studies.Third-ordernonlinearoptical(NLO)responseof Ci3NC hasbeenexaminedusingZ-scantechniquewithfemtosecond(fs),MHzpulsesatwavelengthsof 870 nmand900nm.VariousNLOcoefficients suchastwo-photonabsorption(2PA)coefficient (β), three photonabsorption(3PA)coefficient (γ), andnonlinearrefractiveindex(η2) wereevaluated.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2013
A new organic nonlinear optical single crystal, L-phenylalanine-4-nitrophenol (LPAPN) belonging to the amino acid group has been successfully grown by slow evaporation technique. The lattice parameters of the grown crystal have been determined by X-ray diffraction studies. FT-IR spectrum was recorded to identify the presence of functional group and molecular structure was confirmed by NMR spectrum. Thermal strength of the grown crystal has been studied using TG-DTA analyses. The grown crystals were found to be transparent in the entire visible region. The existence of second harmonic generation signals was observed using Nd:YAG laser with fundamental wavelength of 1064 nm.
Crystal Research and Technology, 2018
Nonlinear optical organic materials of N,N-diphenylbenzamide (NNDPB) and 4-fluoro-N,N-diphenylbenzamide (FNNDPB) are synthesized from benzoylation of N,N-diphenylamine using the substituted benzoyl chlorides. The single crystals of NNDPB and FNNDPB are grown by a slow evaporation technique. Single-crystal X-ray diffraction shows that both the crystals belong to orthorhombic crystallographic system with space group Pbca. Fourier transform infrared spectrum shows the chemical bonding and various functional groups, the carbonyl peak appeared at 1647 and 1651 cm −1 in NNDPB and FNNDPB compounds, respectively. 1 H and 13 C nuclear magnetic resonance analysis examines the placement of aromatic protons and carbons are identified to the synthesized materials. UV-vis near IR spectra analysis showed 100% transmission in the visible region for both NNDPB and FNNDPB crystals. As-grown crystal dielectric constant and dielectric loss are inversely proportional to the frequency at all the temperatures. The thermal properties of NNDPB and FNNDPB crystals are studied from thermogravimetric analysis/differential thermal analysis analysis, it is thermally stable up to 483 and 503 K. Crystal growth mechanism and defects are observed from etching studies. The relative second harmonic generation efficiency is measured by Kurtz-Perry powder technique and is found to be 1.55 and 1.7 times as that of potassium dihydrogen phosphate.
Journal of Crystal Growth, 2009
A1. Crystal morphology A1. Crystal structure A1. X-ray diffraction A2. Growth from solutions B2. Nonlinear optic materials A2. Single crystal growth a b s t r a c t Urea ninhydrin monohydrate (UNM) was synthesized and grown for the first time from aqueous solution employing the slow evaporation method. Single crystal structure was determined by X-ray diffraction data and it reveals that the crystal belongs to centrosymmetric with space group of P2 1 /c. The grown crystals were characterized by thermogravimetric analysis (TGA), differential thermal analysis (DTA) and UV-vis-NIR spectroscopy. Preliminary Z-scan measurement indicates that nonlinear refractive index of this crystal is À4.1 Â10 À8 cm 2 /W. The etching study was performed to assess the growth pattern of the crystal. Dielectric response of the crystal was analyzed for different frequencies and temperatures.
Single crystal of 4Sodium substituted 1,4 but-2-ene-di-oic crystals has been grown by slow evaporation method. Single crystal x-ray diffraction analysis shows that it belong to Triclinic system. The presence of functional groups was confirmed by Fourier Transform Infrared Spectroscopy. Optical behavior has been studied by UV-Vis analysis and found that there is no absorption in the entire visible region. The NLO efficiency of the crystal has been confirmed by the Kurtz Perry method using Nd-YAG laser.