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      https://www.ias.ac.in/article/fulltext/jcsc/124/04/0951-0961

    • Keywords

       

      Crystal growth; thermal analysis; differential scanning calorimetry; nonlinear optical materials; single crystal X-ray diffraction; FTIR spectrum.

    • Abstract

       

      Good quality single crystals of 4-hydroxy tetramethylpiperazinium picrate (TMPP) were grown by slow evaporation solution growth method at room temperature. The average dimensions of the grown crystals were $0.6 \times 0.2 \times 0.2$ cm3. The solubility of the compound was estimated using methanol and acetone. The elemental analysis confirms the formation of the compound in the stoichiometric proportion. The UV-visible transmittance study indicates that the crystal possesses minimum transmittance at 370 nm and no absorption at 470-900 nm. The Bragg peaks obtained in the powder X-ray diffraction pattern confirm its crystallinity. The thermal behaviour of the crystal was investigated using thermogravimetric (TG) and differential thermal analysis (DTA) techniques. The structure of the compound was determined by using single crystal X-ray diffraction method. The compound was found to be crystallize in the monoclinic space group P2(1)/c (a = 6.9513(8)Å, b = 11.8016(14)Å, c = 22.018(2)Å, 𝛼 = 90.00°, 𝛽 = 92.575(2)°, 𝛾 = 90.00°). The thermal anomalies observed in the differential scanning calorimetry (DSC) heating and cooling cycles indicate the occurrence of first order phase transition. Fourier transform infrared (FTIR) and polarized Raman spectral analyses were used to confirm the presence of various functional groups in the compound. The nonlinear optical property (NLO) of the crystal was analysed by Kurtz-Perry powder technique and found that the compound has SHG efficiency 1.5 times greater that of potassium dihydrogen phosphate (KDP).

    • Author Affiliations

       

      T Dhanabal1 G Amirthaganesan1 M Dhandapani1 Samar K Das2

      1. Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641 020, India
      2. School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
    • Dates

       
  • Journal of Chemical Sciences | News

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