Abstract
In classical block copolymers, the constituent blocks are linked via a covalent bond. In supramolecular copolymers, this connection is replaced by a more labile, in some cases reversible, one – hydrogen bonding, host-guest interaction, and metal-to-ligand complexation represent the most prominent and versatile examples in this respect. The structural modification has a profound impact on the overall material’s properties: The characteristics of the polymeric subunits are retained and combined with the special features of the non-covalent linkage. With respect to block copolymers bridged by a cationic transition metal ion complex, the newly gained properties can go far beyond a (reversible) chemical linkage and might include, e.g., a photo- or magnetochemical behavior. Moreover, the charged nature of the linking complex can change the physical characteristics of the overall block copolymer when compared to a classical covalent counterpart – this may hold true in solution, in the melt as well as in the solid state. These features together allow considering the metal-complex linkage in such assemblies not to be “innocent” but rather to be a very short block or segment on its own. In this chapter, the metal-bisterpyridine linkage within linear copolymer architectures will be highlighted exemplarily. By this, the modularity of metallo-supramacromolecular chemistry, referred to as playing LEGO™ with macromolecules or as using the connection as element block, will be shown.
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The authors acknowledge financial support of research by the Deutsche Forschungsgemeinschaft (DFG).
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Winter, A., Schubert, U.S. (2019). Block Copolymers with Element Blocks: The Metal-Bisterpyridine Linkage. In: Chujo, Y. (eds) New Polymeric Materials Based on Element-Blocks. Springer, Singapore. https://doi.org/10.1007/978-981-13-2889-3_18
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