Kalainathan S

Department of Physics

School of Advanced Sciences

Vellore Campus

Karuppanan N

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

The Journal of Physical Chemistry C

It is reported that a novel third order organic nonlinear optical material namely, Pyrrolidin-1-ium 2-chloro-4-nitrobenzoate 2-chloro-4-nitrobenzoic acid (PCNCN) has been synthesized and grown by isothermal solvent evaporation solution growth technique. Single crystal X-ray diffraction analysis revealed that PCNCN belonged to monoclinic crystal system with a centrosymmetric space group of P21/c. The morphology of the as grown PCNCN crystal compared well with that obtained by theoretically generated morphology. The molecular vibrations of PCNCN were analyzed through Fourier transform infrared and NMR spectrum analyses. Optical properties such as transmittance, photoluminescence, and laser damage threshold were studied. The thermal stability of PCNCN was measured through TG-DTA measurement. The dielectric properties such as dielectric constant, dielectric loss, ac conductivity and activation energy of PCNCN single crystal were studied as a function of frequency at different temperatures. The PCNCN single crystals were further characterized for their third order nonlinear optical properties such as nonlinear absorption coefficient, nonlinear refractive index and optical limiting behavior using continuous wave Nd: YAG laser. The quantum chemical investigations were performed using B3LYP/6-311++G(d, p) basis set. © 2019 Elsevier Ltd

Optics & Laser Technology

Synthesis, structural, dielectric, laser damage threshold, third order nonlinear optical and quantum chemical investigations on a novel organic crystalline material: Pyrrolidin-1-ium 2-chloro-4-nitrobenzoate 2-chloro-4-nitrobenzoic acid for opto-electronic applications

A new molecular adduct namely, 4-(dimethylamino)benzaldehyde 4-nitrophenol (4DMAB4NP), has been synthesized through crystal engineering route by reacting 4-(dimethylamino)benzaldehyde and 4-nitrophenol in equimolar ratio. This hydrogen bonded material is found to have crystallized with centrosymmetric space group of P21/c at room temperature (RT) and making it appropriate for third order nonlinear optical (TONLO) applications. The different kinds of functional groups existing in the 4DMAB4NP were recorded and assigned through FTIR and NMR spectral studies. Thermal behavior of 4DMAB4NP was analyzed through TGA and DTA analyses. Its solubility in toluene solvent was measured to obtain high quality single crystals. The 4DMAB4NP single crystals were characterized for their laser damage threshold, TONLO properties and optical limiting behavior. Further, the dielectric behavior of 4DMAB4NP single crystal were also investigated as a function of temperature (313–343 K). In addition, density functional studies of 4DMAB4NP molecule in gaseous phase were accomplished at the B3LYP/6–311++G (d, p) basis function. Finally, 3-D Hirshfeld surface maps and the 2-D fingerprint diagram were generated for the title molecule by using crystal explorer 3.1 program. © 2018 Elsevier B.V.

Journal of Molecular Structure

Synthesis, structural, spectral, third order nonlinear optical and quantum chemical investigations on hydrogen bonded novel organic molecular adduct 4-(dimethylamino)benzaldehyde 4-nitrophenol for opto-electronic applications

Bulk Crystal Growth, Optical, Electrical, Thermal, and Third Order NLO Properties of 2-[4-(Diethylamino)benzylidene]malononitrile (DEBM) Single Crystal

Organic single crystals of new stilbazolium derivative, (E)-4-(3-ethoxy-2-hydroxystyryl)-1-methyl pyridinium iodide (3ETSI), was grown by slow evaporation technique. Single crystal X-ray diffraction study revealed that 3ETSI crystallizes in monoclinic crystal system with centrosymmetric space group P21/c. The characteristic functional groups of the grown crystal were identified by FT-IR spectral studies. The 1H NMR spectral studies further confirm the molecular structure of the grown crystal. The thermal behaviour of 3ETSI crystal was studied by TG/DSC analysis. The grown crystal was found to be transparent in the region between 471 and 800 nm as indicated by the UV–visible spectral studies. Photoluminescence spectrum of 3ETSI crystal shows broad green emission peak at 529 nm. The mechanical strength of the grown crystal was estimated by Vickers microhardness tester. The laser damage threshold of 3ETSI crystal was found to be 2.5 GW/cm2 using Nd: YAG laser (1064 nm). Etching studies enunciate the two-dimensional (2D) layer growth mechanisms in the grown crystal. The third-order nonlinear optical properties including nonlinear refractive index (n2), nonlinear absorption coefficient (β), and third-order nonlinear optical susceptibility (χ(3)) of 3ETSI crystal were investigated by the Z-scan technique using continuous wave (CW) He-Ne laser at 632.8 nm. © 2017, Springer Science+Business Media New York.

Journal of Materials Science: Materials in Electronics

Synthesis, growth, crystal structure and characterization of new stilbazolium derivative single crystal: (E)-4-(3-ethoxy-2-hydroxystyryl)-1-methyl pyridinium iodide (3ETSI)

Synthesis, growth, and characterization of new stilbazolium derivative single crystal: 2-[2-(2,4-dimethoxy-phenyl)-vinyl]-1-ethyl-pyridinium iodide for third-order NLO applications

Materials Chemistry and Physics

Synthesis, growth, structure and characterization of 1-Ethyl-2-(2-p-tolyl-vinyl)-pyridinium iodide (TASI) – An efficient material for third-order nonlinear optical applications

Optik

Supramolecular architecture of third-order nonlinear optical ammonium picrate: Crystal growth and DFT approach

A New Nonlinear Optical Stilbazolium Family Crystal of (E)-1-Ethyl-2-(4-nitrostyryl) Pyridin-1-ium Iodide: Synthesis, Crystal Structure, and Its Third-Order Nonlinear Optical Properties

Journal	Data powered by TypesetThe Journal of Physical Chemistry C
Publisher	Data powered by TypesetAmerican Chemical Society (ACS)
ISSN	1932-7447
Open Access	0