Sequence-controlled supramolecular copolymer constructed by self-sorting assembly of multiple noncovalent interactions

Abstract

A sequence-controlled supramolecular copolymer was constructed by self-sorting assembly of metal coordination and two types of host–guest interactions.

Crown Ether‐Based Supramolecular Polymers: From Synthesis to Self‐Assembly

“…Recently, our group reported a linear CSP that was constructed via two host-guest interactions of crown ether and pillar [5]arene and metal coordination of terpyridine. [59] As shown in Figure 17, four monomers were first synthesized, the heteroditopic monomer 41 contained a terpyridine group and a neutral guest, the heteroditopic monomer 42 was composed of 6,6′-anthracyl-substituted tpy (tay) and a B21C7 group, the homoditopic monomer 43 contained two pillar [5]arene groups, and the homoditopic monomer 44 consisted of two SAS groups. As the B21C7 selectively bound SAS, pillar [5]arene selectively bound neutral guest, and tay can form a heteroleptic complex tpy-Mtay with tpy and metal ion in the solution.…”

“…Cyclic CSPs were generally formed as coproducts in the process of preparing other structural CSPs. The topologies of the other nonlinear CSPs mainly [59] Copyright 2021, The Royal Society of Chemistry. included: i) the crosslinked CSPs; ii) the hyperbranched CSPs; iii) the dendritic and star-type CSPs.…”

“…Chemical structures of heteroditopic monomers 41 and 42 and the homoditopic monomers 43 and 44, and the schematic representation of supramolecular polymerization. Adapted with permission [59]. Copyright 2021, The Royal Society of Chemistry.…”

Supramolecular copolymerization through self-correction of non-polymerizable transient intermediates

“…Self-sorting is an exquisite strategy to construct sequence-controlled supramolecular copolymers. 26,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] The successful construction of such systems follows a simple thermodynamic rule which requires a large difference in binding constants among interaction pairs. However, the detailed self-sorting pathways, and the evolution of possible transient intermediates are relatively unexplored and thereby are still elusive.…”

Sequence-Controlled Metallopolymers: Synthesis and Properties

“…Strategies that can prominently increase the degree of polymerization and the scalable preparation of sequence-controlled polymers are often decisive for their information-carrying capability . Numerous sequence-controlled polymerization methodologies based on chemical approaches have been established to prepare organic sequence-controlled polymers. − One of the most straightforward among these methods may be the direct transformation of tailor-made monomers with a built-in sequence into polymer products. Most of these polymerization strategies are anionic polymerizations and metathesis polymerizations, e.g., ring-opening metathesis polymerization (ROMP) − and acyclic diene metathesis (ADMET) polymerization, , which are also the methods of choice for the preparation of metallopolymers due to their good tolerance toward various functionalities. − …”