用立方体,混合Pd(II) 和Pt(II) M6L12的聚合物网络:合成和压力放松行为
Julia Zhao1, Eduard O Bobylev1, David J Lundberg2
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|September 29, 2023
概括
这项研究引入了使用 (II) 和 (II) 离子的聚合物金属有机 (polyMOC) 凝. 这些新型聚MOC通过控制金属 - 连接物交换动态来显示可调节的能量消散特性.
科学领域:
- 材料科学
- 聚合物化学
- 超分子化学
背景情况:
- 金属有机/多面体 (MOC) 是高级聚合物网络的关键构件.
- 之前的研究还没有从稳定的Pt (II) 基MOC或混合Pd (II) /Pt (II) 系统中探索多MOC.
- 金属-连接物交换动态对多MOC能耗的影响在很大程度上尚未研究.
研究的目的:
- 引入一种新的聚合物金属有机 (polyMOC) 架构.
- 使用 (II) 和 (II) 离子的混合物来证明多MOC的合成.
- 调查金属-联体交换动态和多MOC能耗之间的关系.
主要方法:
- 由M6L12立方体 (M=Pd(II),Pt(II) 或混合物交联的聚乙烯糖醇 (PEG) 纤维合成的聚MOC凝.
- 在多MOC网络结构中变化了Pd (II) 含量.
- 分析了M6L12连接层的应力放松率和金属连接物交换动态.
主要成果:
- 开发了一种具有可调节网络结构的新型聚MOC凝.
- 通过变化的Pd (II) 和Pt (II) 含量实现了跨越3个数量级的调节式应力放松率.
- 在混合金属多MOC中观察到独特的放松行为,这表明了连接内部的合作相互作用.
结论:
- 介绍了用于多MOC设计和合成的新型MOC架构.
- 从Pd (II) /Pt (II) 金属离子的混合物中成功制备的多MOC.
- 证明了由于多价结,多MOCs表现出独特的放松行为,使其能够独立控制材料属性.
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