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Synthesis, structure, growth and physical properties of a novel organic NLO crystal: 1,3-Dimethylurea dimethylammonium picrate |
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| Authors: | G Anandha Babu A Chandramohan G Bhagavannarayana |
| Affiliation: | a Centre for Crystal Growth, SSN College of Engineering, SSN Nagar 603 110, Kalavakkam, Tamilnadu, India b Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641 020, Tamilnadu, India c Materials Characterization Division, National Physical Laboratory, New Delhi 110012, India d Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India |
| Abstract: | A novel noncentrosymmetric crystal was prepared from 1,3-dimethylurea dimethylammonium picrate, C11H18N6O8 (DMUP), which was designed for second harmonic generation. DMUP crystals exist in noncentro symmetric space group Cmc21 with unit cell dimensions a = 14.288(4) Å, b = 17.023(5) Å, c = 6.8268(13) Å, α = β = γ = 90° and volume = 1660.5(8) Å3. The crystal structure of DMUP has been determined using single crystal X-ray diffraction studies. The single crystals of DMUP were successfully grown by the slow evaporation method with dimensions 10 mm × 4 mm × 3 mm using dimethylformamide as solvent. The structural perfection of the grown crystals has been analysed by High-resolution X-ray diffraction (HRXRD) rocking curve measurements. Powder test with Neodymium-doped Yttrium aluminum garnet (Nd:YAG) laser radiation shows a high second harmonic generation (SHG). The laser induced surface damage threshold for the grown crystal was measured using Nd:YAG laser. |
| Keywords: | 61 66 Hq 42 70 Nq 81 10 Dn 61 10 &minus i |
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