Kalainathan S

Department of Physics

School of Advanced Sciences

Vellore Campus

Jagannathan K

Gnanasekaran T.

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

Materials Letters

4-Dimethylaminopyridinium p-chlorophenolate (4DMAPCP) organic crystals were grown by slow evaporation solution growth technique using ethanol as solvent at room temperature. Single crystal X-ray diffraction studies shows that the material crystallizes in monoclinic system with centrosymmetric space group P 21/c and the cell parameters are observed to be a = 9.68 Å, b = 12.84 Å, c = 11.60 Å, Z = 4 and V = 1353 Å3. FT-IR and FT-Raman spectral studies were performed for analysing and assigning the vibrations and also to identify the functional groups. The optical transparency window in the visible and near IR (470–1100 nm) regions was found to be good, thus fulfilling the requirement for nonlinear optical applications. The optical band gap of the material was found to be 3.73 eV. Thermogravimetric analysis and differential thermal analysis showed that the compound decomposes beyond 250 °C. Dielectric loss and dielectric constant measurements as a function of frequency and temperature were measured for the grown crystal. Vicker’s hardness test reveals that 4DMAPCP belongs to the soft category. The laser induced surface damage threshold for the grown crystal is much greater than that of KDP. Third order nonlinear optical parameters like refractive index (n2), absorption coefficient (β) and susceptibility (χ(3)) were assessed by Z-scan studies. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.

Journal of Materials Science: Materials in Electronics

4-Dimethylamino pyridinium p-chlorophenolate a novel third order nonlinear optical single crystal: growth and characterization

Materials Research Innovations

Growth, hardness and laser damage threshold studies on vertical Bridgman grown piperine (PPN) single crystal

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Growth and characterization of novel organic 3-Hydroxy Benzaldehyde-N-methyl 4 Stilbazolium Tosylate crystals for NLO applications

Single crystals of organic optical material, 2-[2-(4-Diethylamino-phenyl)-vinyl]-1-methyl-pyridinium naphthalene-2-sulfonate (DESNS) (15×10×9 mm(3)) were grown by a slow evaporation technique at room temperature using methanol-acetonitrile (1:1) mixed solvent. The molecular structure of the grown crystal was confirmed by single crystal X-ray diffraction studies, and it belongs to orthorhombic system with space group Pbca and the unit cell dimentions are a=11.5148(3) Å, b=15.4352(4) Å, c=27.2187(7) Å, Z=8. The crystallinity of the title crystals was confirmed from the powder XRD pattern. The presence of functional groups of the title crystal was confirmed from the FTIR spectral studies. The transparent range and cut off wavelength of the grown crystal was studied by the UV-Vis-NIR spectroscopic analysis. The mechanical properties and thermal behavior of the grown crystals were studied from Vickers microhardness test and TG/DTA.

Synthesis, growth, crystal structure, spectral, thermal, mechanical and optical studies of stilbazolium derivative single crystal: 2-[2-(4-Diethylamino-phenyl)-vinyl]-1-methyl-pyridinium naphthalene-2-sulfonate (DESNS)

Optik

Studies on the optical and mechanical properties of organic nonlinear optical 1-(4-fluorostyryl)-4-nitrostilbene (FNS) single crystal

Materials Science and Engineering: A

Vickers microhardness studies on solution-grown single crystals of magnesium sulphate hepta-hydrate

Studies of microhardness anisotropy and Young's modulus of nonlinear optical crystal l-arginine hydrochlorobromo monohydrate

Materials Chemistry and Physics

Mechanical characteristics of flux-grown calcium titanate and nickel titanate crystals

Microhardness, fracture mechanism and dielectric behaviour of flux-grown GdFeO3 single crystals

Journal of Crystal Growth

Growth and characterization of 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) single crystals

Microhardness studies on 4-Dimethylamino-N-methyl 4-Stilbazolium Tosylate (DAST)

Journal	Data powered by TypesetMaterials Letters
Publisher	Data powered by TypesetElsevier BV
ISSN	0167-577X
Open Access	0