Design and syntheses of functional carbon dioxide-based polycarbonates via ternary copolymerization

Li, Hongjiu; Wang, Wenzhen; Liu, Shuang; Xue, Dan; Wang, Junye; Liu, Yun; Huang, Qing

doi:10.1016/j.jcou.2024.102689

Cited by 2 publications

(1 citation statement)

References 152 publications

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“…After CO 2 is added to the monomer, gas can evoke 1D polymerization to afford a class of CO 2 -connected alternating copolymers (Figure 6, i). 38 In comparison to those polycarbonates prepared by ring-opening polymerization of CO 2 and epoxide, 39 the synthesis of such CO 2 -based dynamic polymers proceeds spontaneously at ambient (room temperature) and catalystfree conditions. A relatively high molecular weight (M n > 10 5 g/mol) can be obtained even at a low gas pressure (0.01−0.1 bar), which is mainly due to the high binding ability of DGBs.…”

Section: Gas-connected Assembled Materials and Multidimensional Controlmentioning

confidence: 99%

Dynamic Gas-Bridged Bond: An Opportunity of Fabricating Dynamic Assembled Materials with Gas

Yang,

Wang,

Yan

2024

ACS Appl. Mater. Interfaces

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Gas molecules, as a family of unique polyatomic building blocks, have long been considered hard to involve in molecular assembly or construct assembled materials due to their structural simplicity yet paucity of defined interacting sites. To solve this non-trivial challenge, a core idea is to break the limit of current ways of bonding gas molecules, endowing them with new modes of interactions that match the basic requirements of molecular assembly. In recent years, a new concept, named the dynamic gas-bridged bond (DGB), has emerged, which allows for gas molecules to constitute a dynamic bridging structure between other building blocks with the aid of frustrated Lewis pairs. This makes it possible to harness gas in a supramolecular or dynamic manner. Herein, this perspective discusses distinct dynamic natures of DGBs and manifests their particular functions in various fields, including the control of molecular/polymeric self-assembly nanostructures, creation of multidimensional assembled materials, and recyclable catalysts. The future research direction and challenges of dynamic gas-bridged chemistry toward gas-programmed self-assembly and gas-constructed adaptive materials are highlighted.

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Section: Gas-connected Assembled Materials and Multidimensional Controlmentioning

confidence: 99%

Dynamic Gas-Bridged Bond: An Opportunity of Fabricating Dynamic Assembled Materials with Gas

Yang,

Wang,

Yan

2024

ACS Appl. Mater. Interfaces

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Salophen-Type Schiff Bases Functionalized with Pyridinium Halide Units as Metal-Free Catalysts for Synthesis of Cyclic Carbonates from Carbon Dioxide and Terminal Epoxides

Kawka,

Bester,

Bukowska

et al. 2024

Catalysts

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Objectives: Salophen-type Schiff bases functionalized with 4-(dimethylamino)pyridinium halide units are shown to be effective single-component catalysts for the synthesis of cyclic carbonates from terminal epoxides and carbon dioxide. Methods: Using one of such trifunctional organocatalysts, epichlorohydrin could be selectively converted to the target cyclic carbonate under 2 bar of CO2 at 120 °C. Results: Over 80% conversion of E3 was then observed when organocatalyst S3 was used in the amount of 0.5 mol% (TON = 156) and even the use of 0.05 mol% S3 guaranteed almost 50% conversion of E3 to C3 (TON = 893). Conclusions: The presence of tertiary amine units in the molecules of these homogeneous organocatalysts proved to be crucial for the catalytic activity of developed organocatalysts. However, their catalytic activity was also supported by the presence of acidic phenolic units and halide ions as Lewis bases. Some closely related compounds were found to be clearly less active or inactive catalytically under the applied reaction conditions.

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Design and syntheses of functional carbon dioxide-based polycarbonates via ternary copolymerization

Cited by 2 publications

References 152 publications

Dynamic Gas-Bridged Bond: An Opportunity of Fabricating Dynamic Assembled Materials with Gas

Dynamic Gas-Bridged Bond: An Opportunity of Fabricating Dynamic Assembled Materials with Gas

Salophen-Type Schiff Bases Functionalized with Pyridinium Halide Units as Metal-Free Catalysts for Synthesis of Cyclic Carbonates from Carbon Dioxide and Terminal Epoxides

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