Recent developments in polypseudorotaxanes and polyrotaxanes

Arunachalam, M.; Gibson, Harry W.

doi:10.1016/j.progpolymsci.2013.11.005

Cited by 196 publications

(179 citation statements)

References 141 publications

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“…More interestingly, this coordination polymer could undergo the interconversion between monomer and polymer under During the last two decades, a large variety of stimuli-responsive self-assemblies with interesting properties have been constructed based on the unique host-guest recognition behaviors. 55 As a representative, CB [8] displays remarkable binding affinity towards positively charged and relatively large guests. Kim and coworkers have reported that CB [8] can form stable 1 : 1 : 1 ternary complexes with paraquat and 2,6-dihydroxynaphthalene, which resulted in enhanced charge-transfer interaction within the assembly.…”

Section: View Article Onlinementioning

confidence: 99%

“…55 As a representative, CB [8] displays remarkable binding affinity towards positively charged and relatively large guests. Kim and coworkers have reported that CB [8] can form stable 1 : 1 : 1 ternary complexes with paraquat and 2,6-dihydroxynaphthalene, which resulted in enhanced charge-transfer interaction within the assembly. The unique binding features make CB[n]-based host-guest chemistry a good platform for the construction of supramolecular polymers by elegant combination with metal coordination.…”

Section: View Article Onlinementioning

confidence: 99%

“…Up to now, a variety of supramolecular polymers with different chain topologies, such as linear, star-type, cross-linked, hyperbranched, and dendronized, have been fabricated and prepared under the direction of this methodology. 8,9 Among various noncovalent interactions used in the construction of supramolecular polymers, host-guest complexation and metal-ligand coordination are two main classes of noncovalent interactions and have been studied widely. Host-guest recognition refers to the formation of supramolecular inclusion complexes between two or more entities connected together in a highly-controlled and cooperative manner.…”

Section: Introductionmentioning

confidence: 99%

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Supramolecular polymers constructed by orthogonal self-assembly based on host–guest and metal–ligand interactions

2015

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Supramolecular polymers constructed by orthogonal self-assembly based on host-guest and metal-ligand interactions are attracting increasing attention currently because of their interesting properties and potential applications. Host-guest interactions impart these polymers with good selectivity and convenient enviro-responsiveness, and metal-ligand interactions endow them with various coordination geometries, strong yet tunable coordination binding abilities, as well as magnetic, redox, photophysical, and electrochromic properties. Therefore, supramolecular polymers constructed by orthogonal host-guest and metal-ligand interactions have wide applications in the fields of soft matter, fluorescence sensing, heterocatalysis, electronics, gas storage, etc. In this critical review, we will address the recent development of supramolecular polymeric systems involving metal-ligand interactions and host-guest molecular recognition. Specifically, we classify the related supramolecular polymers depending on the types of macrocyclic hosts, and highlight their intriguing properties originating from the elegant combination of host-guest complexation and metal centers.

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Section: View Article Onlinementioning

confidence: 99%

Section: View Article Onlinementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Supramolecular polymers constructed by orthogonal self-assembly based on host–guest and metal–ligand interactions

2015

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“…Several comprehensive reviews and books cover these works. 25,[28][29][30][31] Although many polyrotaxanes have been reported over the past two decades, few …”

Section: Basis For the Molecular Design Of A Topology-transformable Pmentioning

confidence: 99%

“…Dynamic molecular and macromolecular systems driven by the control of mechanical or noncovalent linkages, enabling changes in the polymer topology, are very attractive not only from a scientific perspective but also for actual applications, such as smart devices and materials. [21][22][23][24][25][26][27][28][29][30][31] Among such linkages, rotaxane linkages are the most promising because rotaxane molecules can survive without any interactions between the components, that is, the components display a high degree of freedom and mobility. Therefore, macromolecules consisting of rotaxane-linked polymer units should show dynamic characteristics, for example, topological changes, in addition to unique properties that have not been attained so far.…”

Section: Introductionmentioning

confidence: 99%

Topology-transformable polymers: linear–branched polymer structural transformation via the mechanical linking of polymer chains

Takata

Aoki

2017

Polym J

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In this review article, we discuss the synthesis and dynamic nature of macromolecular systems that have mechanically linked polymer chains capable of undergoing a topology transformation driven by a rotaxane molecular switch. The rotaxane linking of polymer chains plays a crucial role in these systems. A linear polymer possessing a crown ether/sec-ammonium salt-type [1] rotaxane moiety at the axle chain terminal was prepared via the rotaxane linking of a single polymer chain. A linear-cyclic polymer topology transformation was achieved via the movement of the wheel component from one end to the other end of the axle component using the rotaxane macromolecular switch function. The successful synthesis of a macromolecular [2]rotaxane (M2R) possessing a single polymer axle and one crown ether wheel led to a variety of unique applications, such as the development of topology-transformable polymers and the synthesis of rotaxane crosslinked polymers (RCPs). The introduction of a polymer chain to the wheel component of M2R (rotaxane linking of two polymer chains) produced a rotaxane-linked AB block copolymer that transformed its topology from linear to branched. Furthermore, a rotaxane-linked three-component polymer and an ABC triblock copolymer were synthesized and transformed to the corresponding 3-arm star (co)polymers, and the transformation was confirmed by measuring the hydrodynamic volume change. The structural transformation of 4-arm and 6-arm star polymers was also accomplished using the dynamic mobility of a similar rotaxane. As a useful application, M2R-based vinylic crosslinkers (RCs) were prepared and applied to the synthesis of RCPs, whereby the addition of RCs into radical polymerization systems of vinyl monomers afforded polymers with excellent toughness by enhancing both of tradeoff properties that cannot be achieved using typical covalent crosslinkers.

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Molecular Topologies and Architectures with Mechanical Bonds

2016

The Nature of the Mechanical Bond

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Recent developments in polypseudorotaxanes and polyrotaxanes

Cited by 196 publications

References 141 publications

Supramolecular polymers constructed by orthogonal self-assembly based on host–guest and metal–ligand interactions

Supramolecular polymers constructed by orthogonal self-assembly based on host–guest and metal–ligand interactions

Topology-transformable polymers: linear–branched polymer structural transformation via the mechanical linking of polymer chains

Molecular Topologies and Architectures with Mechanical Bonds

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