Molecular Bottlebrush Supported Mono(phenoxy–imine) Metal Complexes: Synthesis and Ethylene Polymerization

Dong, Zhen; Huang, Wenjun; Liu, Xiaoqing; Yu, Feng; Long, Chuanjiang; Feng, Sitong; Luo, Li; Chen, Zhong‐Ren

doi:10.1021/acs.macromol.1c01000

Cited by 12 publications

(9 citation statements)

References 39 publications

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“…Compared with conventional linear polymers, MBs display many unique features, such as the nanoscale size, higher persistent length of the single chain, and reduced overlap of neighboring chains [ 104 ]. Chen and coworkers reported a poly(norbornene- graft -styrene) (PNB- g -PS)-supported mono(phenoxy-imine) metal complex for ethylene polymerization, as shown in Figure 13 a [ 79 ]. PNB- g -PS-Br was prepared via grafting-through ROMP of the norbornenyl macromonomer, which was readily prepared by ATRP.…”

Section: Applications Of Smps In Catalysismentioning

confidence: 99%

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Sidechain Metallopolymers with Precisely Controlled Structures: Synthesis and Application in Catalysis

Suo

et al. 2022

Polymers

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Inspired by the cooperative multi-metallic activation in metalloenzyme catalysis, artificial enzymes as multi-metallic catalysts have been developed for improved kinetics and higher selectivity. Previous models about multi-metallic catalysts, such as cross-linked polymer-supported catalysts, failed to precisely control the number and location of their active sites, leading to low activity and selectivity. In recent years, metallopolymers with metals in the sidechain, also named as sidechain metallopolymers (SMPs), have attracted much attention because of their combination of the catalytic, magnetic, and electronic properties of metals with desirable mechanical and processing properties of polymeric backbones. Living and controlled polymerization techniques provide access to SMPs with precisely controlled structures, for example, controlled degree of polymerization (DP) and molecular weight dispersity (Đ), which may have excellent performance as multi-metallic catalysts in a variety of catalytic reactions. This review will cover the recent advances about SMPs, especially on their synthesis and application in catalysis. These tailor-made SMPs with metallic catalytic centers can precisely control the number and location of their active sites, exhibiting high catalytic efficiency.

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Section: Applications Of Smps In Catalysismentioning

confidence: 99%

“…Ethylene polymerization using the molecular and the MB-supported catalysts. Reprinted from Ref [79]. with permission.…”

mentioning

confidence: 99%

Sidechain Metallopolymers with Precisely Controlled Structures: Synthesis and Application in Catalysis

Suo

et al. 2022

Polymers

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“…Tremendous methods have been developed to prepare bimodal polymers. − Compared with the physical blending method, the chemical synthetic method could prepare bimodal PEs with good miscibility due to synthesizing LMW and HMW chains in situ. In our previous work, well-defined linear unimodal and bimodal PEs with controllable molecular weights have been synthesized by a chain transfer polymerization method .…”

Section: Introductionmentioning

confidence: 99%

Molecular Weight Distribution Shape Dependence of the Crystallization Kinetics of Semicrystalline Polymers Based on Linear Unimodal and Bimodal Polyethylenes

Long

Dong

et al. 2023

ACS Appl. Polym. Mater.

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The manipulation of the crystallization kinetics and crystallinity of polymers without altering their chemical composition, chain structure, or average molecular weight is challenging, while little attention is paid to the role of molecular weight distribution (MWD) shape. In this work, a series of well-defined linear unimodal and bimodal polyethylenes (PEs) with molecular weights ranging from 300 k to 1200 k g/mol were synthesized to serve as a model system to study the impact of bimodal MWD shape on the crystallization kinetics of semicrystalline polymers in comparison with unimodal MWD shape at the same weight-average molecular weight (M w). It is shown that PEs with a bimodal shape exhibit a faster nucleation rate and crystallization rate with a smaller lamellar width at low isothermal temperatures. A higher crystallization enthalpy of bimodal PEs is shown in non-isothermal experiments. The mechanism behind this is elucidated, which suggests that MWD shapes mainly affect the small-scale nucleation process without altering the large-scale growth process. This first systematic comparative study on the crystallization kinetics of linear unimodal and bimodal PEs gives insight into tailoring the crystallization behavior of semicrystalline polymers from an MWD shape perspective.

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“…These studies showed different applications that cover a wide range of fields like catalysis, storage media, electrolysis, sensing, and in electro‐optical devices 18–25 . Also, in the medical field, as anticancer, antimicrobial, and antiviral agents, metallopolymers were used 26–31 . The complex is formed by the combination of an atom or ion with complexing agents (anions) 32 .…”

Section: Introductionmentioning

confidence: 99%

Novel bioactive copper and nickel polymeric complexes: Synthesis, characterization, antimicrobial activity, and DFT calculations

Metwally,

Mohamed,

ElKhawaga

et al. 2023

J of Applied Polymer Sci

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Polymeric complexes, especially metal‐containing polymers, possess aggregated medical applications, especially as antibacterial and antifungal agents. This work describes a facile procedure for producing a series of novel copper and nickel complexes of poly(2‐hydroxyphenyl methacrylamide) and poly(2‐carboxyphenyl methacrylamide). The polymeric ligands were synthesized through a multistep procedure. Firstly, 4‐formylphenyl methacrylate was constructed by acylating 4‐hydroxybenzaldehyde with methacryloyl chloride. Then, polymerization of the as‐prepared monomer to obtain poly(4‐formylphenyl methacrylate) using benzoyl peroxide as an initiator. Thirdly, the polymeric ligands PL1 and PL2 were achieved via exchange reactions between poly(4‐formylphenyl methacrylate) and o‐aminophenol and anthranilic acid, respectively. Consequently, the two ligands were reacted with copper and nickel acetates to afford four target complexes (Cu‐PL1, Ni‐PL1, Cu‐PL2, and Ni‐PL2). By FT‐IR, 1HNMR, UV‐visible, and TGA analyses, the structures of PL1, PL2, and their complexes were investigated. Furthermore, the geometries of PL1, PL2, and their complexes were reported through a molecular modeling to investigate some interesting parameters such as the bond length, bond angle, charge on the atoms, the HOMO and LUMO using the Material Studio program. The calculation results illustrated that octahedral geometries are proposed for the synthesized metal complexes. The reported antimicrobial efficiency showed a strong potency for most synthesized compounds against the selected microbes, especially compounds Cu‐PL1 and Cu‐PL2 which are more effective than the standard against Candida albicans.

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Molecular Bottlebrush Supported Mono(phenoxy–imine) Metal Complexes: Synthesis and Ethylene Polymerization

Cited by 12 publications

References 39 publications

Sidechain Metallopolymers with Precisely Controlled Structures: Synthesis and Application in Catalysis

Sidechain Metallopolymers with Precisely Controlled Structures: Synthesis and Application in Catalysis

Molecular Weight Distribution Shape Dependence of the Crystallization Kinetics of Semicrystalline Polymers Based on Linear Unimodal and Bimodal Polyethylenes

Novel bioactive copper and nickel polymeric complexes: Synthesis, characterization, antimicrobial activity, and DFT calculations

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