Supramolecular Chirality of the Two-Component Supramolecular Copolymer Gels: Who Determines the Handedness?

Liu, Yaqing; Chen, Chunfeng; Wang, Tianyu; Liu, Minghua

doi:10.1021/acs.langmuir.5b03938

Cited by 37 publications

(32 citation statements)

References 45 publications

(71 reference statements)

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“…Owing to the dynamic features of supramolecular systems, supramolecular chirality can be modulated through the design of intramolecular, intermolecular, and external stimuli factors . The asymmetric stacking of molecules induced by noncovalent interactions is the main pathway to form supramolecular chirality . Thus, dynamic modulation is also beneficial to reveal the mechanism of chiral formation.…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

“…Supramolecular chirality is one of the most important research topics with various applications in the materials and chemistry fields.O wing to the dynamic features of supramolecular systems, supramolecular chirality can be modulated through the designo fi ntramolecular,i ntermolecular,a nd external stimuli factors. [48] The asymmetric stacking of molecules induced by noncovalent interactions is the main pathway to form supramolecular chirality. [48] Thus, dynamic modulation is also beneficial to reveal the mechanism of chiral formation.T his minireview describes examples of dynamic tuning for supramolecular chirality from the internal to the externall evel.…”

Section: Conclusiona Nd Future Prospectsmentioning

confidence: 99%

“…[48] The asymmetric stacking of molecules induced by noncovalent interactions is the main pathway to form supramolecular chirality. [48] Thus, dynamic modulation is also beneficial to reveal the mechanism of chiral formation.T his minireview describes examples of dynamic tuning for supramolecular chirality from the internal to the externall evel. We describe how achiral factors could be actively integrated within chiral structures through molecular modification, hydrogen bonding, p-p packing, coordination interactions,a nd externals timuli, and discuss their key roles in inducing the inversion of chirality and macroscopic handedness.…”

Section: Conclusiona Nd Future Prospectsmentioning

confidence: 99%

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Dynamic Modulation of Supramolecular Chirality Driven by Factors from Internal to External Levels

Yue

Zhu

2019

Chemistry An Asian Journal

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Supramolecular chirality, generated by the asymmetric assembly of chiral or achiral molecules, has attracted intense study owing to its potential to offer insights into natural biological structures and its crucial roles in advanced materials. The optical activity and stacking pathway of building molecules both greatly determine the chirality of the whole supramolecular structure. The flexibility of supramolecular structures makes their chirality easy to modulate through abundant means. Adjustment of the molecular structure or packing mode, or external stimuli that act like a finger gently pushing toy bricks, can greatly change the chirality of supramolecular assemblies. The dynamic regulation of chiral nanostructures on the intramolecular, intermolecular, and external levels could be regarded as the modulatory essence in numerous strategies, however, this perspective is ignored in most reviews in the literature. Herein, therefore, we focus on the ingenious dynamic modulation of chiral nanostructures by these factors. Through dynamic modulation with changes in chiroptical spectroscopy and electron microscopy, the mechanism of formation of supramolecular chirality is also elaborated.

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Section: Conclusion and Future Prospectsmentioning

confidence: 99%

Section: Conclusiona Nd Future Prospectsmentioning

confidence: 99%

Section: Conclusiona Nd Future Prospectsmentioning

confidence: 99%

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Dynamic Modulation of Supramolecular Chirality Driven by Factors from Internal to External Levels

Yue

Zhu

2019

Chemistry An Asian Journal

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“…[1][2][3][4][5][6][7][8][9][10] Controlled conformational changes at the pendant groups modulate these supramolecular and/or steric interactions, resulting in variations on the helical structure of the polymer, that is,e longation [11][12][13] and/or helical sense. [29,30] However,asfarasweknow and despite its potential interest, no practical application of this effect has been reported.Herein, we show how it is possible to take advantage of this chiral conflict effect in ad ynamic helical copolymer to control its helical sense after interaction with an external stimulus.I nthis way,the copolymer becomes its sensor.Several strategies can be envisaged to make use of this effect. [1][2][3][4][5][6][7][8][9][10] In the case of copolymers formed by the combination of chiral and achiral monomers,t he modulation of the helical structure may occur through ac onformational communication mechanism (going from the chiral to the achiral pendants) that originates ac hiral amplification phenomenon denoted as the sergeants and soldiers effect.…”

mentioning

confidence: 99%

“…[29,30] However,asfarasweknow and despite its potential interest, no practical application of this effect has been reported. [29,30] However,asfarasweknow and despite its potential interest, no practical application of this effect has been reported.…”

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confidence: 99%

Chiral Conflict as a Method to Create Stimuli‐Responsive Materials Based on Dynamic Helical Polymers

et al. 2019

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An ew multi-sensor material based on helical copolymers showing the chiral conflict effect have been prepared. It can successfully detect and identify diverse metal cations in solution. The design of this material has taken into account not only the opposite helical senses induced by the two chiral monomers in the copolymer,b ut also their dynamic behavior.T he induced helical sense can thus be enhanced, diminished, or inverted by interaction with different stimuli (that is,m etal ions). Thus,d epending on both the copolymer compositions (such as monomer ratios and absolute configurations) and the nature of the metal ion, the response of these dynamic helical copolymers to adopt as ingle-handed PorM helix is unique,m aking it possible not only to detect their presence,b ut also to identify them individually.N ew multisensors materials based and inspired on this effect should arise in the future choosing appropriate monomers and stimuli.The helical structures of dynamic polymers,s uch as poly-(phenylacetylene)s (PPAs), are usually stabilized by supramolecular interactions between monomer repeating units along the polymer chains,w ith steric effects also playing arole. [1][2][3][4][5][6][7][8][9][10] Controlled conformational changes at the pendant groups modulate these supramolecular and/or steric interactions, resulting in variations on the helical structure of the polymer, that is,e longation [11][12][13] and/or helical sense. [14,15] Thus,c hiral amplification, helical enhancement, or helix inversion can be induced by the action of appropriate external stimuli. [1][2][3][4][5][6][7][8][9][10] In the case of copolymers formed by the combination of chiral and achiral monomers,t he modulation of the helical structure may occur through ac onformational communication mechanism (going from the chiral to the achiral pendants) that originates ac hiral amplification phenomenon denoted as the sergeants and soldiers effect. [16][17][18][19][20][21][22][23][24][25][26][27][28] In such acase,the presence of asmall amount of the chiral monomer (minor component, sergeant) commands the secondary structure of the whole copolymer chain, that is,e ither M or P helices,b yi nducing ac ertain spatial orientation in the achiral units (major component, soldier). Recently,our group extended the concept of the sergeants and soldiers effect to am ore complex situation of PPAc opolymers;s pecifically, bipolymers,that is,c opolymers derived from two monomers, in which the two components are chiral. [16,17] In this way,one of them acts as ac hiral sergeant, while the other acts as ac hiral soldier.H ence,w hile the helical sense of the copolymer (that is,i ts M or P helicity) is commanded by the absolute configuration of the sergeant (minor component), the chirality at the periphery of the helix depends on the intrinsic chirality of the soldier (major component).Those studies showed that this chiral-to-chiral communication phenomenon, which is operative along ac opolymer chain and responsible of the enhancement of asingle-handed helicity,w...

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Preparation of Self‐Assembled Composite Hydrogels and Their Application in Biomedicine and Wastewater Treatment

Wang¹,

Zhou²,

Zhang³

et al. 2021

Supramolecular Gels

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Supramolecular Chirality of the Two-Component Supramolecular Copolymer Gels: Who Determines the Handedness?

Cited by 37 publications

References 45 publications

Dynamic Modulation of Supramolecular Chirality Driven by Factors from Internal to External Levels

Dynamic Modulation of Supramolecular Chirality Driven by Factors from Internal to External Levels

Chiral Conflict as a Method to Create Stimuli‐Responsive Materials Based on Dynamic Helical Polymers

Preparation of Self‐Assembled Composite Hydrogels and Their Application in Biomedicine and Wastewater Treatment

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