(Graph Presented) 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 = 11.326 A˚, b = 7.264 A˚, c = 20.036 A˚; 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 (500-1200 nm). The nonlinear refractive index, nonlinear absorption coefficient and third-order nonlinear susceptibility of EDA4NP were estimated to be η2 = 5.46 × 10-8 cm2 W-1, β = 0.65 × 10-3 cm W-1 and χ(3) = 2.96 × 10-6 esu respectively. The limiting behavior observed with the sample is attributed mainly to nonlinear refraction. © 2014 Elsevier B.V. All rights reserved.

Vinitha G

Physics

School of Advanced Sciences

Chennai Campus

Thangaraj M

Ravi G

Sabari Girisun T.C

Loganathan A.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Single crystals of ammonium tetroxalate dihydrate doped with p-nitrophenol (PNP doped ATOXAL) were grown using the slow evaporation solution growth technique. The harvested crystals possessed the P1¯ space group and occupied the triclinic crystal system. From UV–vis-NIR spectrum the optical parameters like optical band gap (Eg), refractive index (n), electric susceptibility (χc) and real and imaginary parts of the dielectric constant were found to be 3.276 eV, 1.58, 0.199, 2.498 and 0.93 × 10−5 respectively at the lower cutoff wavelength. The refractive index value calculated using Abbe's refractometer was 1.581. The crystal exhibited negative photoconductivity. The photoluminescent emission spectrum was recorded and studied. The mechanical properties have been studied using Vicker's microhardness tester and the material belongs to the soft category. The thermal property of the crystal was analysed from the TGA/DTG/DSC curves. The dielectric studies carried out for varied frequencies and temperatures reveal that the material exhibits non-Debye β relaxation. Z-scan studies show that the grown crystal has negative nonlinearity and saturation absorption. © 2018 Elsevier Ltd

Optics & Laser Technology

Effect of P-nitrophenol as dopant in ammonium tetroxalate dihydrate – Spectral, optical, thermal and dielectric analyses

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 P1¯ 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. © 2019

Journal of Molecular Structure

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

Estimation of thermodynamic and third-order nonlinear optical properties of a series of organic liquids based on ethylenediaminium divalent cation, [C2H10N2]X2 (where X = 2-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol and 2,4,6-trinitrophenol respectively) was made. Increase in nitro groups of ethylenediaminium nitrophenolates has predominantly increased the point of decomposition (145–243 °C). Various thermodynamic properties as a function of temperature were estimated theoretically from the DSC curves. Thermal conductivity and specific heat capacity was increasing while thermal diffusivity was decreasing with rise in temperature. Ethylenediaminium trinitrophenolate (EDA246TNP) showed maximum thermal conductivity (30.3 W m− 1 K− 1) and specific heat capacity (2684 J kg− 1 K− 1), while thermal diffusivity (9.6 × 10− 6 m2 S− 1) was higher for ethylenediaminium 2-nitrophenolate (EDA2NP). Z-scan experiment showed that all samples exhibit saturable absorption and self-defocusing behaviour under CW laser (532 nm, 50 mW) excitation. The observed nonlinearity was found to be thermal in origin with order of nonlinearity as ED246TNP &gt; EDA24DNP &gt; EDA4NP &gt; EDA2NP. EDA246TNP possess maximum nonlinear absorption coefficient (8.37 × 10− 3 cm/W), nonlinear refractive index (8.41 × 10− 8 cm2/W), third-order nonlinear optical susceptibility (5.21 × 10− 6 esu), second-order hyperpolarizability (9.81 × 10− 25 esu) and thermo-optic coefficient (− 0.21 × 10− 6 K− 1) than other phenol-ammonium salts. All samples exhibit optical limiting action with optical limiting onset values of 35–38 mW having limiting amplitude of 6.7–9.3 mW. The influence of number and position of nitro groups in tuning the thermodynamic and nonlinearity of ethylenediaminium nitrophenolate was discussed in detail. © 2017 Elsevier B.V.

Journal of Molecular Liquids

Influence of number and position of nitro groups in tuning the thermodynamic and nonlinear optical properties of ethylenediaminium nitrophenolates

Growth, structural and optical characterization of L-histidine 4-nitrophenolate (LHPNP) single crystals for NLO applications

Current Applied Physics

Synthesis, growth and characterization of bisthiourea zinc bromide for optical limiting applications

Synthesis and characterization of ethylenediaminium nitrophenolate

Growth and characterization of an organic NLO material ammonium malate

Journal of Hazardous Materials

Compatibility study of trans-1,4,5,8-tetranitro-1,4,5,8-tetraazadecalin (TNAD) with some energetic components and inert materials

Ethylenediaminium di(4-nitrophenolate): A third order NLO material for optical limiting applications

Journal	Data powered by TypesetSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Publisher	Data powered by TypesetElsevier BV
ISSN	1386-1425
Open Access	No