Synthesis, growth, structural, optical, thermal and mechanical properties of bis-benzotriazole trichloroacetic acid sing
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Bull Mater Sci (2020)43:300 https://doi.org/10.1007/s12034-020-02278-1
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Synthesis, growth, structural, optical, thermal and mechanical properties of bis-benzotriazole trichloroacetic acid single crystals A THIRUNAVUKKARSU1,2, S SUDHAHAR3,*, G MAHESHWARAN3, T SUJATHA1, P R UMARANI2 and R MOHAN KUMAR2 1
Department of Physics, S.I.V.E.T College, Chennai 600073, India Department of Physics, Presidency College, Chennai 600005, India 3 Department of Physics, Alagappa University, Karaikudi 630003, India *Author for correspondence ([email protected]) 2
MS received 16 March 2020; accepted 3 July 2020 Abstract. The potential organic bis-benzotriazole trichloroacetic acid (BBTCA) single crystal was formed by slow evaporation of solvents by solution-growth method. The structural parameters and crystalline perfection of BBTCA crystal was confirmed by single crystal X-ray diffraction and powder X-ray diffraction analyses. The BBTCA crystal belongs to the crystal system monoclinic with the space group of P21/c. Various functional groups and corresponding modes of vibrations were identified by using FTIR spectrum. The optical transparency window of the grown BBTCA crystal was studied by UV–Vis–NIR spectroscopy. Photoluminescence study indicates that the broad band emissions occurred at near band edge of the visible region. In TG-DTA, thermal behaviour reveals that BBTCA is thermally stable up to 130C. The dielectric properties of BBTCA with respect to frequency were investigated with various temperatures. Third-order nonlinearities and mechanical behaviour of as-grown BBTCA crystal were tested by Z-scan experiment and Vicker’s hardness test. Keywords. Optical materials; chemical synthesis; thermogravimetric analysis; X-ray diffraction; dielectric properties; photoluminescence analysis.
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Introduction
In the recent past few years, researchers are interested to grow nonlinear optical (NLO) materials made-to-measure for their variety of applications, such as laser remote sensing, group velocity mismatching, optical information processing, data storage by optical process, telecommunication, optical parametric generation (OPG), electro-optic modulation, THz wave generation, medical diagnostics, etc. [1–3]. Owing to the NLO chromophores of organic chelate compounds, they have higher second- and third-order hyperpolarizabilities, orientation, dimensionality, p-electron conjugated systems and delocalization length for a accomplished crystal structure [4–6]. Peculiarly, the prominent molecular polarizability and optical nonlinearity in the third order were determined by substantial p-electrons delocalization in an organic supramolecular system. Among them, the versatile organic molecular structure has been reported for their NLO properties, organic trichloroacetic acid-based derivative complexes have good NLO properties and crystallizability. The trichloroacetic acid can easily form crystalline salts with amines, amino acids, and pyridine and azoles compounds.
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