Star PolyMOCs with Diverse Structures, Dynamics, and Functions by Three-Component Assembly

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• 作者：Dr. Yufeng Wang ; Yuwei Gu ; Eric G. Keeler ; Jiwon V. Park ; Prof. Dr. Robert G. Griffin and Prof. Dr. Jeremiah A. Johnson
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：January 2, 2017
• 年：2017
• 卷：129
• 期：1
• 页码：194-198
• 全文大小：3285K
• ISSN：1521-3757

文摘

We report star polymer metal–organic cage (polyMOC) materials whose structures, mechanical properties, functionalities, and dynamics can all be precisely tailored through a simple three-component assembly strategy. The star polyMOC network is composed of tetra-arm star polymers functionalized with ligands on the chain ends, small molecule ligands, and palladium ions; polyMOCs are formed via metal–ligand coordination and thermal annealing. The ratio of small molecule ligands to polymer-bound ligands determines the connectivity of the MOC junctions and the network structure. The use of large M₁₂L₂₄ MOCs enables great flexibility in tuning this ratio, which provides access to a rich spectrum of material properties including tunable moduli and relaxation dynamics.