柔性双咪唑配体导向的Co(Ⅱ)-戊二酸金属有机骨架材料的合成、结构和性能 |
Flexible Bis(imidazole)-Based Ligands Oriented Co(Ⅱ)-Glutarate Metal-Organic Frameworks: Syntheses, Structures and Properties |
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摘要: 在水热条件下合成并表征了2例基于柔性配体构筑的Co(Ⅱ)-MOFs:{[Co(glu)(bimb)]·4H2O}n(1),[Co(glu)(bix)0.5]n(2)(H2glu=戊二酸;bimb=1,4-双(咪唑-1-基)-丁烷;bix=1,4-双(咪唑-1-基-亚甲基)-苯)。配合物1显示非穿插的(4,4)-菱形网格,通过层间氢键和π…π作用拓展为三维超分子结构。加热失水后1的结构不可逆地降解。配合物2呈现典型的柱-层状三维结构,其拓扑符号为41263,中心Co(Ⅱ)离子采用四方锥构型。此外,性质研究表明:配合物1在水溶液中对染料甲基橙具有显著的吸附活性,配合物2表现出弱的反铁磁行为。 |
关键词: 晶体结构 戊二酸 双咪唑配体 吸附 磁性 |
基金项目: 上海稀土功能材料重点实验室、云南省高校功能配合物和磁性材料科技创新团队、云南省教学质量与教学改革项目(No.207301023)、国家教学质量与教学改革(No.201810684012)和国家自然科学基金(No.81601602)资助。 |
Abstract: Two new Co(Ⅱ)-MOFs based on flexible ligands, namely {[Co(glu)(bimb)]·4H2O}n (1) and[Co(glu)(bix)0.5]n (2) (H2glu=glutaric acid; bimb=1,4-bis(imidazol-1-yl)-butane; bix=1,4-bis(imidazol-1-yl-methylene)-benzene), have been hydrothermally synthesized and structurally characterized. Compound 1 displays non-interpenetrated (4, 4)-rhomboid grid layers. A 3D supramolecular framework is invoked through interlayer hydrogen bonding and π…π interactions. Upon dehydration the structure of 1 degraded irreversibly. Compound 2 exhibits a typical pillar-layered 3D framework with 41263 topology, in which the Co(Ⅱ) ion adopts a square pyramidal coordination geometry. Moreover, compound 1 exhibited significant adsorption activity towards methyl orange in aqueous solution, and 2 showed weak antiferromagnetic behavior. |
Keywords: crystal structure glutaric acid bis(imidazole) ligands adsorption magnetism |
投稿时间:2020-07-11 修订日期:2020-12-28 |
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杨玉亭,屠长征,汪帆,张悦,王建玲,尹红菊,成飞翔.柔性双咪唑配体导向的Co(Ⅱ)-戊二酸金属有机骨架材料的合成、结构和性能[J].无机化学学报,2021,37(4):735-743. |
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