Cu(II) based metallomesogen complex for synthesis, design and characterization: Interplay of cyclam, fluorobenzoic acid, and hexadecyloxypyridine

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-06-21 DOI:10.1016/j.poly.2025.117649

Naima Sharmin , Md. Jahidul Islam , Md. Hafizul Islam , Ajoy Kumer

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Abstract

This research reports the synthesis of a novel multifunctional compound [Cu(Cy)(L)₂](X)₂.2H₂O which exhibiting a combination of intriguing properties. Among the four steps synthesis process, in the 1st step 4-Hexadecyloxy pyridine ligand (L) was prepared, where the 2nd step involved dinuclear copper complex formation [Cu₂(4-FC₆H₄COO)₄(CH₃CH₂OH)₂].2H₂O, the penultimate step lead the formation of the intermediate [Cu(Cy)(H₂O)₂](FC₆H₄COO)₂.2H₂O, and the final reaction of the intermediate with the ligand (L) to yield the desired metallomesogen, [Cu(Cy)(L)₂](FC₆H₄COO)₂.2H₂O as a dark-purple powder. Elemental analysis confirmed the chemical formula of the synthesized final complex as C₆₆H₁₀CuF₂N₆O₆, with calculated and found values for each element matching closely (calculated vs found; C: 67.1 % vs. 67.6 %, H: 9.1 % vs. 10.3 %, N: 7.1 % vs. 6.0 %). A distinctive d-d transition band at 547 nm indicates optical activity in the compound, pointing to a trans-III octahedral geometry around the Cu(II) ion. It also exhibits paramagnetic behavior with a magnetic moment of 1.7 B.M. Notably, the compound demonstrates excellent thermal stability up to 240 °C and exhibits ionic liquid character with low melting point of 44 °C observed by POM and multiple phase transitions elucidated by DSC. This facile synthesis approach has yielded a promising material with potential applications in various fields of material science, encompassing mesogenic, optical, magnetic, thermal, and ionic liquid properties.

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铜（II）基金属合成源配合物的合成、设计和表征：环环酰胺、氟苯甲酸和十六烷基氧吡啶的相互作用

本研究报道了一种新型多功能化合物[Cu(Cy)(L)2](X)2.2H2O的合成，该化合物具有多种有趣的性质。在四步合成过程中，第一步制备了4-十六烷基吡啶配体(L)，第二步生成双核铜配合物[Cu2(4- fc6h4coo)4(CH3CH2OH)2]。第二步2H2O生成中间体[Cu(Cy)(H2O)2](FC6H4COO)2.2H2O，中间体与配体(L)最终反应生成所需的金属源[Cu(Cy)(L)2](FC6H4COO)2.2H2O，为深紫色粉末。元素分析证实，最终合成的配合物化学式为C66H10CuF2N6O6，各元素的计算值与发现值非常接近(计算vs发现；C: 67.1%比67.6%,H: 9.1%比10.3%,N: 7.1%比6.0%)。547 nm处独特的d-d跃迁带表明化合物的光学活性，指向Cu（II）离子周围的反式- iii八面体几何结构。此外，该化合物还表现出顺磁性行为，磁矩为1.7 B.M.。值得注意的是，该化合物在240°C下具有优异的热稳定性，POM观察到的低熔点为44°C， DSC表明其具有多相转变的离子液体特征。这种简单的合成方法已经产生了一种有前途的材料，在材料科学的各个领域都有潜在的应用，包括介生、光学、磁性、热学和离子液体性质。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.