Synthesis, Characterization and Fluorescent Property Evaluation of 1,3,5-Triaryl-2-pyrazolines

Molecules

Aurangzeb Hasan¹  Asghar Abbas¹ 

[1] ¹Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur-50603, Malaysia ²Department of Chemistry, Faculty of Science, Quaid-i-Azam University, Islamabad 45320, Pakistan ³Laboratory of Natural Products, Institute of Bioscience, University Putra Malaysia, Kuala Lumpur 43400, Malaysia

关键词: triarylpyrazolines;    alkoxychalcones;    synthesis;    fluorescence;   

DOI  :  10.3390/molecules16097789

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.