Optically Active Particles of Chiral Polymers

Abstract

Particles constructed by chiral polymers (defined as PCPs) have emerged as a rapidly expanding research field in recent years because of their potentially wide-ranging applications in asymmetric catalysis, enantioselective crystallization, enantioselective release, amongst many others. The particles show considerable optical activity, due to the chirality of the corresponding polymers from which the particles are derived. This review article presents an overview on PCPs with emphasis on our group's recent achievements in the preparation of PCPs derived from optically active helical polymers and their applications. PCPs can be prepared via emulsion polymerization, precipitation polymerization, and suspension polymerization by starting from monomers. Emulsification of preformed chiral polymers and self-assembly approaches also can lead to PCPs. Chiral polymer-based core/shell particles, hollow particles, and magnetic particles are also covered because of their remarkable properties and significant potential applications.

Helical Polymer Particles Derived from Aromatic Acetylenics and Prepared by Suspension Polymerization

“…Nonetheless, the process just provided polymeric particles with large size, i.e., several hundred micrometers in diameter. In addition, the polymeric particles are limited to propargyl derivatives (propargylamides and propargylsulfamides) . To further extend the types of acetylenic‐derived polymer particles, we in the present study established an advanced suspension polymerization technique and especially excitingly, we successfully achieved the suspension polymerization of aromatic acetylene derivatives, which resulted in polymer particles even at nanoscale in size.…”

Chiral Polymers and Polymeric Particles for Enantioselective Crystallization

“…The research group of Prof. Jianping Deng has been very active in the preparation and application of chiral polymeric and chiral inorganic–polymeric hybrid nanoparticles based on optically active helical polymers . For example, Chen et al .…”

Preparation and Applications of Chiral Polymeric Particles

“…On the other hand, particulate materials with small sizes possess many advantages such as high specific surface area, high dispersion ability, and good processing property, which facilitate their applications in numerous areas. From the perspective of key elements constructing chiral particles, they can be divided into chiral metal particles, [1] chiral inorganic non-metallic particles, [2] chiral polymeric particles, [3] and chiral organic-inorganic hybrid particles. [4] All of these materials have been extensively investigated, and a good number of exciting achievements have been made in terms of both fundamental research and applications.…”

“…In addition, up to date many kinds of approaches have been developed for preparing CPPs, e. g. suspension polymerization, [11] emulsion polymerization, [12] precipitation polymerization, [13] dispersion polymerization, [14] and self-assembly. [15] Typical examples of CPPs are fabricated from amino acid-based polymers, [16] substituted polyacetylenes, [3,17] and polyisocyanides. [18] So far, plentiful CPPs have been produced, and they are becoming more and more important for modern science and technologies.…”

“…In recent years, a series of studies concerning the preparation of CPPs and their applications have been accompolished. [3,[16][17][18] This review article summarizes the latest research progress in this field and mainly contains two parts: (1) preparation and (2) applications of CPPs. In Part (1), firstly, we introduce the CPPs which were directly constructed from polymerizing monomers.…”