Self-Assembling Supramolecular Daisy Chains

Abstract

Self‐complementary monomers, incorporating a macrocyclic polyether “head” with an acyclic bipyridinium‐based “tail”, self‐assemble spontaneously in solution to afford an equilibrium mixture of dimeric, trimeric, tetrameric, and pentameric supermolecules (see schematic diagram on the right) having masses of up to at least 5000 u. A cyclic dimer, which crystallized from the mixture of acyclic and cyclic supermolecules, has been characterized by X‐ray crystallography.

Molecular, Supramolecular, and Macromolecular Motors and Artificial Muscles

“…This section describes recent advances and future prospects for controlling the artificial molecular muscles on both single-molecule and microscopic levels and developing them into nanomechanical devices. [93][94][95][96][97][98][99] One strategy for the development of artificial muscles based on MIMs utilizes hydrogen bonding interactions between a neutral crown ether (dibenzo [24]crown-8, DB24C8) and dibenzylammonium (R 2 NH 2 + ) and bipyridinium (bypm 2+ ) stations to produce a pH-switchable system. 18,96 This system has been incorporated 97 into the design of bistable [c2]daisy chains, in which two mechanically interlocked filaments glide along one another through the macrocycles (Figure 4).…”

Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of rigid networking agents in supramolecular systems

“…Supramolecular chemistry, specifically hydrogen bonding, has also been applied to the field of polymer formation and modification. A body of work has been generated involving the formation of networks and polymers using multiple hydrogen bonds [31][32][33]. The structural integrity of the supramolecular systems often exceeds that of the analogous covalent species [31].…”

“…A body of work has been generated involving the formation of networks and polymers using multiple hydrogen bonds [31][32][33]. The structural integrity of the supramolecular systems often exceeds that of the analogous covalent species [31]. While this observation seemed counterintuitive (systems created through more stable associations *Corresponding author.…”

Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of flexible bis-acids and a mixture of rigid and flexible polypyridyls

“…Supramolecular chemistry, specifically hydrogen bonding, has also been applied to the field of poly mer formation and modification. A body of work has been generated involving the formation of net works and polymers using multiple hydrogen bonds (31)(32)(33). The structural integrity of the supramolec ular systems often exceeds that of the analogous covalent species (31).…”

“…A body of work has been generated involving the formation of net works and polymers using multiple hydrogen bonds (31)(32)(33). The structural integrity of the supramolec ular systems often exceeds that of the analogous covalent species (31). While this observation seemed counterintuitive (systems created through more sta ble associations would be stronger than those made through weaker associations), the rationale for this phenomenon was that the supramolecular species was capable of macroscale reorganisation, and capable of achieving a more thermodynamically favourable con formation by cleaving the hydrogen bonds and reform ing in a more stable state.…”