Emulsion copolymerization of substituted acetylenes for constructing optically active helical polymer nanoparticles. Synergistic effects and helicity inversion

Zhao, Biao; Deng, Jianping; Yang, Wantai

doi:10.1002/pola.28023

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…In 1989, Green and co-workers reported that copolymers of an achiral isocyanate with a small fraction of a chiral isocyanate exhibit a disproportionate helical bias. This phenomenon is called the sergeants-and-soldiers (S&S) effect, − and numerous subsequent studies have shown that it is applicable to both covalent − and supramolecular − polymers.…”

Section: Introductionmentioning

confidence: 99%

Biasing the Screw-Sense of Supramolecular Coassemblies Featuring Multiple Helical States

et al. 2020

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By enchaining a small fraction of chiral monomer units, the helical sense of a dynamic polymer constructed from achiral monomer units can be disproportionately biased. This phenomenon, known as the sergeants-and-soldiers (S&S) effect, has been found to be widely applicable to dynamic covalent and supramolecular polymers. However, it has not been exemplified with a supramolecular polymer that features multiple helical states. Herein, we demonstrate the S&S effect in the context of the temperature-controlled supramolecular copolymerization of chiral and achiral biphenyl tetracarboxamides in alkanes. The one-dimensional helical structures presented in this study are unique because they exhibit three distinct helical states, two of which are triggered by coassembling with monomeric water that is codissolved in the solvent. The self-assembly pathways are rationalized using a combination of mathematical fitting and simulations with a thermodynamic mass-balance model. We observe an unprecedented case of an “abnormal” S&S effect by changing the side chains of the achiral soldier. Although the molecular structure of these aggregates remains elusive, the coassembly of water is found to have a profound impact on the helical excess.

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Section: Introductionmentioning

confidence: 99%

Biasing the Screw-Sense of Supramolecular Coassemblies Featuring Multiple Helical States

et al. 2020

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“…Moreover, some interesting rules and phenomena have been observed in the copolymerization systems, including "Sergeants and Soldiers rule", [34] "Synergistic effects" [35] and "Helicity inversion". [36] They are of great significance for a better understanding of chiral polymers and further exploration in chirality-related materials and applications.…”

Section: Polymerization Of Chiral Monomersmentioning

confidence: 99%

Preparation and Applications of Chiral Polymeric Particles

Zhang

Huang

Zhao

et al. 2018

Israel Journal of Chemistry

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Chiral polymeric particles (CPPs) have been gathering increasing interest as typical functional polymeric particles in recent decades. This article presents a review on the preparation and applications of CPPs. The methods for preparing CPPs are classified into two major groups: The first one is the direct polymerization of monomers and the other is the post-treatment of preformed polymers. CPPs have been explored as a unique type of chiral materials in various fields like asymmetric catalysis, enantioselective release, enantioselective crystallization, and enantioseparation. This review article is expected to accelerate the progress of scientific research dealing with CPPs and their applications in chirality-related fields.

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Selective synthesis of helical polymers

Wang

Liu

Gao

et al. 2022

Journal of Polymer Science

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Many researches have been done on synthetic helical polymers because of their wide applications such as chiral recognition, enantiomeric separation, asymmetric catalysis, circularly polarized luminescence, liquid crystallization and so on. Synthetic helical polymers can be generally divided into static helical polymers and dynamic helical polymers on the basis of whether the helix inversion barriers are high or low. And this mini review mainly describes the three common selectively synthetic methods of static helical polymers such as polymerization with chiral monomers, helix‐sense‐selective polymerization and enantiomer‐selective polymerization. We hope that this mini review can provide more ideas on synthesis of chiral materials and encourage further development on novel synthetic methods of helical polymers.

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Emulsion copolymerization of substituted acetylenes for constructing optically active helical polymer nanoparticles. Synergistic effects and helicity inversion

Cited by 5 publications

References 45 publications

Biasing the Screw-Sense of Supramolecular Coassemblies Featuring Multiple Helical States

Biasing the Screw-Sense of Supramolecular Coassemblies Featuring Multiple Helical States

Preparation and Applications of Chiral Polymeric Particles

Selective synthesis of helical polymers

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