Synthesis of lipase–polymer conjugates by Cu(0)-mediated reversible deactivation radical polymerization: polymerization vs. degradation

2020 ◽  
Vol 11 (7) ◽  
pp. 1386-1392
Author(s):  
Chunyang Bao ◽  
Jing Chen ◽  
Die Li ◽  
Aotian Zhang ◽  
Qiang Zhang
Keyword(s):  
Radical Polymerization ◽  
Self Assembly ◽  
Polymer Conjugates ◽  
Reversible Deactivation ◽  
Reversible Deactivation Radical Polymerization

Cu(0)-RDRP was first used for the polymerization-induced self-assembly of lipase–polymer conjugates, inducing the formation of nanospheres with preserved activity and degradability.

scholarly journals One-Step Photocontrolled Polymerization-Induced Self-Assembly (Photo-PISA) by Using In Situ Bromine-Iodine Transformation Reversible-Deactivation Radical Polymerization

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 150 ◽  
Author(s):  
Haihui Li ◽  
Qinghua Xu ◽  
Xiang Xu ◽  
Lifen Zhang ◽  
Zhenping Cheng ◽  
...  
Keyword(s):  
Radical Polymerization ◽  
Self Assembly ◽  
Solid Content ◽  
Transition Metal Catalysts ◽  
Water Soluble ◽  
Step Method ◽  
Reversible Deactivation ◽  
One Step ◽  
Reversible Deactivation Radical Polymerization

Polymerization-induced self-assembly (PISA) has become an effective strategy to synthesize high solid content polymeric nanoparticles with various morphologies in situ. In this work, one-step PISA was achieved by in situ photocontrolled bromine-iodine transformation reversible-deactivation radical polymerization (hereinafter referred to as Photo-BIT-RDRP). The water-soluble macroinitiator precursor α-bromophenylacetate polyethylene glycol monomethyl ether ester (mPEG1k-BPA) was synthesized in advance, and then the polymer nanomicelles (mPEG1k-b-PBnMA and mPEG1k-b-PHPMA, where BnMA means benzyl methacrylate and HPMA is hydroxypropyl methacrylate) were successfully formed from a PISA process of hydrophobic monomer of BnMA or HPMA under irradiation with blue LED light at room temperature. In addition, the typical living features of the photocontrolled PISA process were confirmed by the linear increase of molecular weights of the resultant amphiphilic block copolymers with monomer conversions and narrow molecular weight distributions (Mw/Mn < 1.20). Importantly, the photocontrolled PISA process is realized by only one-step method by using in situ photo-BIT-RDRP, which avoids the use of transition metal catalysts in the traditional ATRP system, and simplifies the synthesis steps of nanomicelles. This strategy provides a promising pathway to solve the problem of active chain end (C-I) functionality loss in two-step polymerization of BIT-RDRP.

Photocontrolled iodine-mediated reversible-deactivation radical polymerization with a semifluorinated alternating copolymer as the macroinitiator

2020 ◽  
Vol 11 (47) ◽  
pp. 7497-7505
Author(s):  
Jiannan Cheng ◽  
Kai Tu ◽  
Enjie He ◽  
Jinying Wang ◽  
Lifen Zhang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Room Temperature ◽  
Blue Led ◽  
Led Light ◽  
Alternating Copolymers ◽  
Alternating Copolymer ◽  
Reversible Deactivation ◽  
Novel Strategy ◽  
Reversible Deactivation Radical Polymerization

A novel strategy for preparing block copolymers with semifluorinated alternating copolymers as macroinitiators was established by photocontrolled iodine-mediated RDRP under irradiation with blue LED light at room temperature.

Copolymerization of simple methacrylates by Cu(0)-mediated reversible deactivation radical polymerization

2018 ◽  
Vol 51 (5) ◽  
pp. 449-459 ◽  
Author(s):  
Jongwon Choe ◽  
Woo Jung Lee ◽  
Han Gyeol Jang ◽  
Youngjoo Song ◽  
Jae Hyun Sim ◽  
...  
Keyword(s):  
Radical Polymerization ◽  
Reversible Deactivation ◽  
Reversible Deactivation Radical Polymerization

Hexamethylphosphoramide as a highly reactive catalyst for the reversible-deactivation radical polymerization of MMA with an in situ formed alkyl iodide initiator

2017 ◽  
Vol 8 (39) ◽  
pp. 6073-6085 ◽  
Author(s):  
Yan-an Wang ◽  
Yan Shi ◽  
Zhifeng Fu ◽  
Wantai Yang
Keyword(s):  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Alkyl Iodide ◽  
Highly Efficient ◽  
Reversible Deactivation ◽  
Reversible Deactivation Radical Polymerization ◽  
Organic Catalyst

A novel and highly efficient organic catalyst for the reversible-deactivation radical polymerization (RDRP) of methyl methacrylate with anin situformed alkyl iodide initiator.

scholarly journals Tunable Quantum Photoinitiators for Radical Photopolymerization

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2694
Author(s):  
Shubhangi Shukla ◽  
Prem C. Pandey ◽  
Roger J. Narayan
Keyword(s):  
Quantum Dots ◽  
Metal Oxides ◽  
Radical Polymerization ◽  
Mechanism Of Action ◽  
Carbon Dots ◽  
Semiconductor Nanocrystals ◽  
Metal Sulfides ◽  
Cross Linking ◽  
Reversible Deactivation ◽  
Reversible Deactivation Radical Polymerization

This review describes the use of nanocrystal-based photocatalysts as quantum photoinitiators, including semiconductor nanocrystals (e.g., metal oxides, metal sulfides, quantum dots), carbon dots, graphene-based nanohybrids, plasmonic nanocomposites with organic photoinitiators, and tunable upconverting nanocomposites. The optoelectronic properties, cross-linking behavior, and mechanism of action of quantum photoinitiators are considered. The challenges and prospects associated with the use of quantum photoinitiators for processes such as radical polymerization, reversible deactivation radical polymerization, and photoinduced atom transfer radical polymerization are reviewed. Due to their unique capabilities, we forsee a growing role for quantum photoinitiators over the coming years.

scholarly journals Rapid Synthesis of Well-Defined Polyacrylamide by Aqueous Cu(0)-Mediated Reversible-Deactivation Radical Polymerization

2016 ◽  
Vol 49 (2) ◽  
pp. 483-489 ◽  
Author(s):  
Glen R. Jones ◽  
Zaidong Li ◽  
Athina Anastasaki ◽  
Danielle J. Lloyd ◽  
Paul Wilson ◽  
...  
Keyword(s):  
Radical Polymerization ◽  
Rapid Synthesis ◽  
Reversible Deactivation ◽  
Reversible Deactivation Radical Polymerization
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