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The precise synthesis of miktoarm star polymers (MSPs) remains one of the great challenges in synthetic chemistry due to the difficulty in locating appropriate structural templates and polymer grafting/growing strategies with high selectivity and efficiency. Herein, ≈2 nm metal‐organic polyhedra (MOPs), constructed from the coordination of isophthalic acid (IPA) and Cu2+, are applied as templates for the precise synthesis of 24‐arm MSPs for their unique logarithmic ligand‐exchange dynamics. Six different polymers are prepared with IPA as an end group and they further coordinated with Cu2+ to afford the corresponding 24‐arm star homo‐polymers. MSPs can be obtained by mixing targeted homo‐arm star polymers in solutions upon thermal annealing. The compositions of MSPs can be facilely and precisely tuned by the recipe of the star polymer mixtures used. Interestingly, the obtained MSPs can be sorted into homo‐arm star polymers through a typical solvent extraction procedure. The hybridization and sorting process can be reversibly conducted through the cycle of thermal annealing and solvent treatment. The complex coordination framework not only opens new avenues for the facile and precise synthesis of MSPs and MOPs with hybrid functionalities, but also provides the capability to design sustainable polymer systems. [ABSTRACT FROM AUTHOR]

The precise synthesis of miktoarm star polymers (MSPs) remains one of the great challenges in synthetic chemistry due to the difficulty in locating appropriate structural templates and polymer grafting/growing strategies with high selectivity and efficiency. Herein, ≈2 nm metal‐organic polyhedra (MOPs), constructed from the coordination of isophthalic acid (IPA) and Cu2+, are applied as templates for the precise synthesis of 24‐arm MSPs for their unique logarithmic ligand‐exchange dynamics. Six different polymers are prepared with IPA as an end group and they further coordinated with Cu2+ to afford the corresponding 24‐arm star homo‐polymers. MSPs can be obtained by mixing targeted homo‐arm star polymers in solutions upon thermal annealing. The compositions of MSPs can be facilely and precisely tuned by the recipe of the star polymer mixtures used. Interestingly, the obtained MSPs can be sorted into homo‐arm star polymers through a typical solvent extraction procedure. The hybridization and sorting process can be reversibly conducted through the cycle of thermal annealing and solvent treatment. The complex coordination framework not only opens new avenues for the facile and precise synthesis of MSPs and MOPs with hybrid functionalities, but also provides the capability to design sustainable polymer systems. [ABSTRACT FROM AUTHOR]

This article, published in Angewandte Chemie, discusses the challenges and potential solutions in the synthesis of miktoarm star polymers. The authors, Mingxin Zhang, Panchao Yin, and their colleagues, propose the use of metal-organic polyhedra with logarithmic ligand exchange dynamics as templates for the reversible sorting and hybridization of miktoarm star polymers. This approach opens up new possibilities for the design of sustainable polymers. The article also briefly mentions other research topics such as visible-light photoswitchable benzimidazole azo-arenes, enantioselective synthesis of arylglycines, electrochemical diacetoxylation of alkenes, and the control of structural properties in supported/bulk metal oxides through catalyst post-treatment. [Extracted from the article]

This article, published in Angewandte Chemie International Edition, discusses the challenges and potential solutions in the synthesis of miktoarm star polymers. The authors propose the use of metal-organic polyhedra with logarithmic ligand exchange dynamics as templates for the reversible sorting and hybridization of miktoarm star polymers with target compositions. This approach opens up new possibilities for the design of sustainable polymers. The article also briefly mentions other research topics such as visible-light photoswitchable benzimidazole azo-arenes as β-arrestin2-biased cannabinoid 2 receptor agonists, enantioselective synthesis of arylglycines, electrochemical diacetoxylation of alkenes, and the control of structural properties of supported/bulk metal oxides through catalyst post-treatment. [Extracted from the article]