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Synthesis, Characterization and Fluorescent Property Evaluation of 1,3,5-Triaryl-2-pyrazolines
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur-50603, Malaysia
Department of Chemistry, Faculty of Science, Quaid-i-Azam University, Islamabad 45320, Pakistan
Laboratory of Natural Products, Institute of Bioscience, University Putra Malaysia, Kuala Lumpur 43400, Malaysia
* Author to whom correspondence should be addressed.
Received: 12 July 2011; in revised form: 3 August 2011 / Accepted: 10 August 2011 / Published: 13 September 2011
Abstract: A series of 1,3,5-triaryl-2-pyrazolines was synthesized by dissolving the corresponding 4-alkoxychalcones in glacial acetic acid containing a few drops of concentrated hydrochloric acid. This step was followed by the addition of (3,4-dimethylphenyl) hydrazaine hydrochloride. Finally the target compounds were precipitated by pouring the reaction mixture onto crushed ice. The structures of the synthesized compounds were established by physicochemical and spectroscopic methods. The 1,3,5-triaryl-2-pyrazolines bearing homologous alkoxy groups were found to possess fluorescence properties in the blue region of the visible spectrum when irradiated with ultraviolet radiation. The fluorescent behavior of these compounds was studied by UV-Vis and emission spectroscopy, performed at room temperature.
Keywords: triarylpyrazolines; alkoxychalcones; synthesis; fluorescence
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MDPI and ACS Style
Hasan, A.; Abbas, A.; Akhtar, M.N. Synthesis, Characterization and Fluorescent Property Evaluation of 1,3,5-Triaryl-2-pyrazolines. Molecules 2011, 16, 7789-7802.
Hasan A, Abbas A, Akhtar MN. Synthesis, Characterization and Fluorescent Property Evaluation of 1,3,5-Triaryl-2-pyrazolines. Molecules. 2011; 16(9):7789-7802.
Hasan, Aurangzeb; Abbas, Asghar; Akhtar, Muhammed Nadeem. 2011. "Synthesis, Characterization and Fluorescent Property Evaluation of 1,3,5-Triaryl-2-pyrazolines." Molecules 16, no. 9: 7789-7802.