The IR temperature studies of phase transition of 4-aminopyridinium-hydrogen maleate-maleic acid: Isotopic effect and nonlinear optical properties |
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| Affiliation: | 1. Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland;2. Institute of Low Temperature and Structure Research, PAN, Okólna 2, 50-950 Wroclaw, Poland;3. Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;1. Department of Physics, Kalasalingam University, Krishnankoil 626 190, India;2. Department of Physics, University College of Engineering Nagercoil, Anna University, Tirunelveli Region, Nagercoil 629 004, India;3. Laboratory of X-ray Crystallography, Indian Institute of Chemical Technology, 500 007 Hyderabad, India;4. Department of Chemistry, Thiagarajar College, Madurai 625009, India;1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, PR China;2. University of Chinese Academy of Sciences, Beijing 100039, PR China;1. School of Physics, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India;2. Department of Physics and Nanotechnology, SRM University, Chennai 603203, Tamil Nadu, India;3. Centre for Crystal Growth, SSN College of Engineering, Kalavakkam 603110, Tamil Nadu, India;1. MRDL, PG & Research Department of Physics, Pachaiyappa’s College, Chennai, 600 030, India;2. Nanophotonics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli, 620015, India;3. Department of Physics, C. Kandaswami Naidu College for Men, Chennai, 600 102, India;1. Crystal Lab, Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India;2. Department of Physics & Electronics, SGTB Khalsa College, University of Delhi, Delhi 110007, India;1. Department of Physics, Periyar Government Arts College, Cuddalore 607001, Tamil Nadu, India;2. Department of Physics, Government Arts College, Tiruvannamalai 606603, Tamil Nadu, India;3. Department of Physics, Arignar Anna Government Arts College, Cheyyar 604407, Tamil Nadu, India;4. Department of Physics, Pachaiyappa''s College for Men, Kanchipuram 603501, Tamil Nadu, India |
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| Abstract: | [4-NH2C5H4NH][C4H3O4][C4H4O4] (abbreviated as APM) and its N,O-deuterated analogue have been synthesized. The single-crystal X-ray diffraction studies for N,O-deuterated analogue are reported. The Kurtz and Perry powder SHG technique confirms the second order nonlinear optical properties of APM. The structural phase transition of APM occurring at 312 K has been examined by infrared spectroscopy. The infrared temperature studies on the polycrystalline APM showed that the modes arising from N H⋯O and OH⋯O intermolecular hydrogen bonds vibrations appear to be very sensitive to the structural phase transition. The molecular mechanism of the phase transition is explained in terms of significant changes in the hydrogen bond configuration. |
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