Kalainathan S

Department of Physics

School of Advanced Sciences

Vellore Campus

Karthigha S

Maheswara Rao K.U

Hamada F

Yamada M

Kondo Y.

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

Journal of Crystal Growth

In this research work, a new extended π-conjugated chromophore of 4-[4-(4-dimethylamino-phenyl) buta-1,3-dienyl]-1-methyl pyridinium p-styrenesulfonate (DCSSS) is synthesized. The present work demonstrates that 4-[4-(4-dimethylamino-phenyl) buta-1,3-dienyl]-1-methyl pyridiniump-styrene sulfonate hydrate (DCSSS·H2O) crystallizes with centrosymmetric space group (P1¯). The asymmetric structure comprises of 4-((1E,3E)-4-(4-(dimethylamino)phenyl)buta-1,3-dien-1-yl)-1-methylpyridinium cation (C18H21N2 +), 4-vinylbenzenesulfonate (C8H7O3S−) anion and a water molecule. The crystal structure is stabilized by C–H⋯O, O–H⋯O, O–H⋯S types of H-bonding interactions along with π–π stacking interaction and C–H···π interactions. In DCSSS, the anion, cation and water molecule are connected by four Owater–H···Owater and Ccation–H···Osulfonate hydrogen bonds, generating R6 6 (18) graph-set notation. This ring motif is sandwiched between two another R4 4 (12) ring motif, which are generated by four O–H⋯O bonds between anion, cation and water molecules, forming laddar lying parallel to the ab plane. The material was characterized by single crystal XRD method, CHN, NMR, FTIR, FT-Raman, TG-DSC and UV-Vis and luminescence studies. To the best of author's knowledge, all these characterizations were made for the first time. We have also emphasized the role of hydrogen bonding on molecular packing to obtain perfectly aligned cations. Third harmonic generation efficiency of the compound is measured by Z-scan technique with continuous wave semiconductor laser of wavelength 532 nm to realize the nonlinear optical properties DCSSS molecule. © 2019 Elsevier B.V.

Journal of Molecular Structure

Synthesis, growth, crystal structure, thermal, linear and nonlinear opticalanalysis of new extended π-conjugated organic material based on methyl pyridinium compound of 4-(4-(4-(dimethylamino) phenyl)buta-1,3-dienyl)-1-methylpyridinium p-styrenesulfonate hydrate

An organic quinolinium derivative nonlinear optical (NLO) crystal, 1-ethyl-2-[2-(4-nitro-phenyl)-vinyl]-quinolinium iodide (PNQI) was synthesized and successfully grown by slow evaporation solution growth technique. Formation of a crystalline compound was confirmed by single crystal X-ray diffraction. The quinolinium compound PNQI crystallizes in the triclinic crystal system with a centrosymmetric space group of P-1 symmetry. The molecular structure of PNQI was confirmed by 1H NMR and 13C NMR spectral studies. The thermal properties of the crystal have been investigated by thermogravimetric (TG) and differential scanning calorimetry (DSC) studies. The optical characteristics obtained from UV–Vis–NIR spectral data were described and the cut-off wavelength observed at 506 nm. The etching study was performed to analyse the growth features of PNQI single crystal. The third order NLO properties such as nonlinear refractive index (n2), nonlinear absorption coefficient (β) and nonlinear susceptibility (χ (3)) of the crystal were investigated using Z-scan technique at 632.8 nm of He[sbnd]Ne laser. © 2017 Elsevier Ltd

Journal of Physics and Chemistry of Solids

Synthesis, growth, crystal structure, optical and third order nonlinear optical properties of quinolinium derivative single crystal: PNQI

Crystal growth, structural investigation and characterization of newly grown quinolinium derivative single crystal: 1-Ethyl-2-(2-p-tolyl-vinyl)-quinolinium; iodide

N-Ethyl quinolinium chromophore crystal 2-[2-(4-chloro-phenyl)-vinyl]-1-ethyl-quinolinium iodide (PCLQI) has been successfully grown by the slow evaporation technique.

RSC Advances

Synthesis, growth and third-order nonlinear optical properties of quinolinium single crystal-PCLQI

Single crystal of 1-(2-Methyl-6-nitro-4-phenyl-3-quinolyl) ethanone was grown using slow evaporation solution growth technique. Single crystal X-ray diffraction study reveals the lattice parameters of the grown crystal. The modes of vibration of different molecular groups present in 2M6NQE were identified by FTIR spectral analysis. Its optical behavior was examined through UV-vis-NIR absorption and PL emission spectrum. They signify that the crystal has transparency in the region between 383 and 1100 nm. The PL spectrum of the title compound shows green emission in the crystal. From the thermal analysis, 2M6NQE has found to be thermally stable up to 263°C, and the melting point of the material is 170°C. The estimations of third order non-linear optical properties like non-linear absorption coefficient (β), non-linear refractive index (n2) and susceptibility [χ(3)] were calculated using Z-scan technique. It has observed that, crystal exhibits reverse saturation absorption and self-defocusing performance. Etching study was carried out for the grown crystal using different solvents.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Growth, spectral, optical, thermal, surface analysis and third order nonlinear optical properties of an organic single crystal: 1-(2-Methyl-6-nitro-4-phenyl-3-quinolyl) ethanone

Optics & Laser Technology

Studies on optically induced nonlinear absorption and refractive index of Br1 crystal for near IR optical switching application

Mechanical and surface analysis of stilbazolium tosylate derivative crystals

Crystal Growth & Design

Growth and Characterization of the NLO Crystal 4-Dimethylamino-N-methyl-4-stilbazolium Tosylate (DAST)

Dyes and Pigments

N-Methylquinolinium derivatives for photonic applications: Enhancement of electron-withdrawing character beyond that of the widely-used N-methylpyridinium

Synthesis, growth, structural, optical, luminescence, surface and HOMO LUMO analysis of 2-[2-(4-cholro-phenyl)-vinyl]-1-methylquinolinium naphthalene-2-sulfonate organic single crystals grown by a slow evaporation technique

Journal	Data powered by TypesetJournal of Crystal Growth
Publisher	Data powered by TypesetElsevier BV
ISSN	0022-0248
Open Access	0