Article
Multidisciplinary Sciences
Zong-Quan Wu, Xue Song, Yan-Xiang Li, Li Zhou, Yuan-Yuan Zhu, Zheng Chen, Na Liu
Summary: Immobilizing organocatalyst onto helical polymers facilitates catalyst recycling and boosts enantioselectivity. Achiral organoiodine-functionalized single left- and right-handed helical polyisocyanides were prepared and used in three asymmetric oxidations, demonstrating high yields and excellent enantioselectivity. The enantioselectivity can be switched by reversing the helicity of the polymer backbone.
NATURE COMMUNICATIONS
(2023)
Review
Materials Science, Multidisciplinary
Shi-Yi Li, Lei Xu, Run-Tan Gao, Zheng Chen, Na Liu, Zong-Quan Wu
Summary: Helical polymers are widely used in various fields due to their unique structure and optical activity. In recent years, they have become a new favorite in the field of circularly polarized luminescence (CPL) materials. This review introduces CPL materials and discusses the advantages and classification of CPL materials based on helical polymers. The research progress of CPL materials of helical polymers is summarized, aiming to stimulate interest and promote further development.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Review
Polymer Science
Qian Wang, Yu-Qi Liu, Run-Tan Gao, Zong-Quan Wu
Summary: This mini review discusses the common synthetic methods of helical polymers and their wide range of applications. By using selective synthesis, helical polymers with specific properties can be prepared.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xun-Hui Xu, Shu-Ming Kang, Run-Tan Gao, Zheng Chen, Na Liu, Zong-Quan Wu
Summary: This work demonstrates the development of high performance fluoropolymers through a living polymerization mechanism. The synthesized poly(trifluoromethyl methylene) exhibits excellent properties such as resistance to chemical corrosion, high hydrophobicity, and low dielectric loss. The polymer can form stable helices and shows high optical activity and circularly polarized luminescence when synthesized using chiral palladium catalysts. Moreover, the polymer can be completely degraded to (E)-1,1,1,4,4,4-hexafluorobut-2-ene at high temperatures (>280 degrees C) and can be further modified.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Lei Xu, Yong-Jie Wu, Run-Tan Gao, Shi-Yi Li, Na Liu, Zong-Quan Wu
Summary: Inspired by natural helices like DNA, the researchers successfully induced one-handed helical structures in achiral polymers using chiral amines and alcohols, and the induced helices were able to maintain their structure even after the chiral inducer was removed. These induced helices formed stable gels and showed helicity discrimination ability. They also demonstrated efficient enantioselective crystallization and separation of enantiomers. This research has significant implications for developing novel chiral materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Run-Tan Gao, Lei Xu, Shi-Yi Li, Na Liu, Zheng Chen, Zong-Quan Wu
Summary: Recently, there has been increasing interest in cyclic polymers due to their unique topologies, properties, and functions compared to linear analogues. This mini-review focuses on the recent advances in the synthesis and applications of cyclic polymers. It provides an overview of the main synthetic methods, such as ring closure and ring expansion, and discusses the exploration of properties and applications of synthetic cyclic polymers. Additionally, it critically assesses preliminary studies on the efficient synthesis and potential applications of cyclic polymers, and discusses the remaining challenges and possible solutions in the field.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Polymer Science
Hui Zou, Shan-Shan Han, Guo-Qiang Li, Li Zhou, Na Liu, Zong-Quan Wu
Summary: Conjugated block copolymers consisting of poly(phenyl isocyanide) (PPI) and polyfluorene (PF) segments are synthesized via one-pot sequential polymerization of monomer 1 and monomer 2. These copolymers exhibit distinctive optical properties and fascinating chiral self-assembly behavior due to the helical conformation of PPI segment and pi-conjugated structure of PF segment. Furthermore, the self-assembled helical nanofibers display excellent circularly polarized luminescence performance.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Polymer Science
Hui Zou, Wei Liu, Chao Wang, Li Zhou, Na Liu, Zong-Quan Wu
Summary: In this study, optically active pi-conjugated block copolymers consisting of polyfluorene and poly(phenyl isocyanide) were synthesized in one pot through two sequential polymerizations. The resulting copolymers self-assembled into single-handed helical nanofibers, exhibiting excellent optical activity and circularly polarized luminescence properties.
Article
Chemistry, Inorganic & Nuclear
Shu-Ming Kang, Xue Song, Ting-Ting Zhang, Lei Xu, Yuan-Yuan Zhu, Zong-Quan Wu
Summary: Static one-handed helical polymers have been utilized as an ideal platform for chiral synthesis, and a novel strategy utilizing one-handed polyisocyanide-supported Co(III)-salen catalysts has been developed for the asymmetric cooperative catalysis of epoxides. The polymer-supported catalyst P1-Co-N-3 exhibits high catalytic activity and enantioselectivity, producing desired products in high enantiomeric excesses and good yields at a low catalyst loading. This polyisocyanide-based catalyst also shows good functional group tolerance and stable activity in multiple recycles.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Hui Zou, Shan Tai, Shu-Yang Zhao, Li Zhou, Na Liu, Zong-Quan Wu
Summary: Optically active helical polycarbenes were synthesized by catalyzing the living and controlled helix-sense-selective polymerization (HSSP) of methyl salicylate modified diazoacetate monomer with pi-allylPdCl using chiral phosphine ligands. The resulting helical polycarbenes could be postpolymerization modified to produce functional polycarbenes efficiently.
CHEMICAL COMMUNICATIONS
(2023)
Article
Polymer Science
Chao Wang, Li Zhou, Yuan-Yuan Zhu, Na Liu, Zong-Quan Wu
Summary: In this study, pi-conjugated block copolymers with facile fabrication and control over self-assembly were successfully synthesized. The resulting block copolymers exhibited one-handed helical nanofibers with high optical activity and circularly polarized luminescence, which can be attributed to the chirality induced by the asymmetric polymerization and transfer of chirality during self-assembly.
Review
Chemistry, Multidisciplinary
Jia-Xin Yu, Bing-Hui Duan, Zheng Chen, Na Liu, Zong-Quan Wu
Summary: Chiral materials have attracted significant attention due to their distinctive luminescent properties and wide array of applications. Helical polymers, as a type of chiral material, exhibit immense promise for the synthesis of circularly polarized luminescent materials. This review summarizes the synthesis methods and potential applications of circularly polarized luminescent materials based on helical polymers.
Article
Engineering, Environmental
Shiyi Li, Qilin Wang, Yuehui Zhai, Zhen Xing, Jundong Zhong, Danming Chao, Xuanbo Zhu, Changru Rong, Zongquan Wu, Zheng Chen
Summary: As an effective approach, oligo (ethylene glycol) (OEG) side chain engineering improves the performance of optoelectronic polymers, and its impact on electrochromic (EC) polymers has been explored in this study. The introduction of OEG side chains significantly shortens the coloring time and improves the coloration efficiency, while enhancing the solubility of the polymers in green solvents. The findings contribute to the development of all-green EC devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Li Zhou, Kai He, Shu-Ming Kang, Xing-Yu Zhou, Hui Zou, Na Liu, Zong-Quan Wu
Summary: A pair of enantiomeric photoswitchable PdII catalysts with different polymerization activities, selectivities, and enantioselectivities were prepared and studied under different light conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Bing-Hui Duan, Jia-Xin Yu, Run-Tan Gao, Shi-Yi Li, Na Liu, Zong-Quan Wu
Summary: Cyclic polymers have unique structure and properties, which have attracted significant research attention. However, controlled synthesis of cyclic polymers with predictable molar mass and narrow distribution remains challenging. In this study, a novel cyclic catalyst was developed to initiate the ring-expansion polymerization of isocyanides, leading to the synthesis of cyclic helical polymers with predictable molecular weight and low dispersity. Interestingly, well-defined cyclic bottlebrush polymers were also obtained by the ring-expansion polymerization of isocyanide macromonomers, as confirmed by transmission electron microscopy.
CHEMICAL COMMUNICATIONS
(2023)