Mesomorphic Studies on a Series of Nickel (II) Centered Aromatic Complexes Displaying Liquid Crystalline Phases
Mesomorphic Studies on a Series of Nickel (II) Centered Aromatic Complexes Displaying Liquid Crystalline Phases作者机构：Department of Chemistry Sultan Qaboos University Al-Khod Sultanate of Oman Department of Physics Sultan Qaboos University Al-Khod Sultanate of Oman Department of Chemistry Jahangirnagar University Dhaka Bangladesh
出 版 物：《World Journal of Condensed Matter Physics》 (凝固态物理国际期刊（英文）)
年 卷 期：2022年第12卷第3期
页 面：27-37页
学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学]
主 题：Columnar Mesomorphic Nematic Discotic Metallomesogens Polarized Optical Microscopy Differential Scanning Calorimetry
摘 要：Two new series (A & B) of three materials each based on the aroyl hydrazinato-nickel (II) complex were synthesized and characterized. The core molecule in these series consists of two 4-benzoyloxy benzylidene moieties and two benzene rings attached at the azomethine moiety. These latter benzene rings have one or two alkoxy chains comprised of either 10, 12, 16 or 18 carbon atoms. The characterization of these two series by polarized optical microscopy and differential scanning calorimetry is described herein. Upon cooling from the Isotropic phase, three of the six materials display a monophasic columnar phase and the other three possess a biphasic nematic and columnar phases. Upon heating, all six materials have a clearance point at high temperatures without displaying mesomorphic behavior. In series B mesogens, it was observed that the longer the hydrocarbon tail length, the lower the clearance point.
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