一个[CuII24]截断的八面体及其[CuII8]构建块
Lucinda R B Wilson1, Gary S Nichol1, Scott J Dalgarno2
1EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK. ebrechin@ed.ac.uk.
概括
研究人员使用化铜和 thiacalixarene 连接体合成了一个 [CuII24] 子,具有截断的八面体结构. 这种子表现出铜离子之间强烈的反铁磁合,这种特性也在相关的[CuII8]星团中观察到.
科学领域:
- 协调化学 协调化学
- 超分子化学 超分子化学
- 磁电化学 磁电化学 磁电化学
背景情况:
- 卡利沙伦是多功能宏循环宿主,能够与各种金属离子形成复合体.
- 金属有机 (MOCs) 为催化,传感和磁性的应用提供了可调节的特性.
- 基于铜的集群由于其多样化的氧化状态和磁性行为而引起人们的兴趣.
研究的目的:
- 合成和描述新型含铜的超分子.
- 研究由此产生的金属有机框架的结构和磁性特性.
- 探索连接体和反离子对集群架构的影响.
主要方法:
- 铜(II) 二酸盐 (CuCl2·2H2O) 与p-tert-butylthiacalix[4]arene (H4TC[4]A) 的反应.
- 结晶和单晶X射线衍射用于结构确定.
- 测试磁性合的磁性易感度测量.
主要成果:
- 形成一个[CuII24]子复合体,其金属骨架采用了截断的八面体几何.
- 观察子内的铜 (II) 离子之间强烈的反铁磁合.
- 在类似条件下使用铜 (II) 化物 (CuBr2) 合成相关的[CuII8]集群.
结论:
- 该p-tert-butylthiacalix[4]arene连接体可以有效地模拟复杂的铜(II) 的形成.
- 截断的八面体结构促进了金属中心之间的显著磁相互作用.
- 阳离子变异 (化物与化物) 导致不同的,但相关的铜集群架构.
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