Synthesis of azobenzene‐containing polymers via RAFT polymerization and investigation on intense fluorescence from aggregates of azobenzene‐containing amphiphilic diblock copolymers

2008 ◽  
Vol 46 (16) ◽  
pp. 5652-5662 ◽  
Author(s):  
Jie Xu ◽  
Wei Zhang ◽  
Nianchen Zhou ◽  
Jian Zhu ◽  
Zhenping Cheng ◽  
...  
Keyword(s):  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Intense Fluorescence ◽  
Amphiphilic Diblock Copolymers

scholarly journals Selenol-Based Nucleophilic Reaction for the Preparation of Reactive Oxygen Species-Responsive Amphiphilic Diblock Copolymers

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 827
Author(s):  
Xiaowei An ◽  
Weihong Lu ◽  
Jian Zhu ◽  
Xiangqiang Pan ◽  
Xiulin Zhu
Keyword(s):  
Reactive Oxygen Species ◽  
Molecular Weight ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Amphiphilic Copolymers ◽  
Nucleophilic Reaction ◽  
Amphiphilic Diblock Copolymers

Selenide-containing amphiphilic copolymers have shown significant potential for application in drug release systems. Herein, we present a methodology for the design of a reactive oxygen species-responsive amphiphilic diblock selenide-labeled copolymer. This copolymer with controlled molecular weight and narrow molecular weight distribution was prepared by sequential organoselenium-mediated reversible addition fragmentation chain transfer (Se-RAFT) polymerization and selenol-based nucleophilic reaction. Nuclear magnetic resonance (NMR) and matrix-assisted laser desorption/ionization time-to-flight (MALDI-TOF) techniques were used to characterize its structure. Its corresponding nanomicelles successfully formed through self-assembly from the copolymer itself. Such nanomicelles could rapidly disassemble under oxidative conditions due to the fragmentation of the Se–C bond. Therefore, this type of nanomicelle based on selenide-labeled amphiphilic copolymers potentially provides a new platform for drug delivery.

Amphiphilic diblock copolymers based on sucrose methacrylate: RAFT polymerization and self-assembly

2018 ◽  
Vol 266 ◽  
pp. 628-639 ◽  
Author(s):  
Raphael Henrique Marques Marcilli ◽  
Ana Paula Rodrigues Camilo ◽  
Cesar Liberato Petzhold ◽  
Maria Isabel Felisberti
Keyword(s):  
Self Assembly ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Amphiphilic Diblock Copolymers

Synthesis and Solution-state Assembly or Bulk State Thiol-ene Crosslinking of Pyrrolidinone- and Alkene-functionalized Amphiphilic Block Fluorocopolymers: From Functional Nanoparticles to Anti-fouling Coatings

2010 ◽  
Vol 63 (8) ◽  
pp. 1159 ◽  
Author(s):  
Jun Ma ◽  
Jeremy W. Bartels ◽  
Zhou Li ◽  
Ke Zhang ◽  
Chong Cheng ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Building Blocks ◽  
Ene Reactions ◽  
Reversible Addition ◽  
Complex Building ◽  
Crosslinked Networks ◽  
Amphiphilic Diblock Copolymers ◽  
Synthetic Methodologies

With an ever increasing interest in the combined functionality and versatility of materials, increasing demands are placed on synthetic methodologies by which to produce such materials. This work demonstrates the preparation of block copolymers having fluorocarbon content, pyrrolidinone units, and alkene groups as complex building blocks for the assembly of discrete nanoparticles in solution and, alternatively, transformation into sophisticated crosslinked networks. Reversible addition–fragmentation chain transfer (RAFT) polymerization is a facile tool for the synthesis of well-defined polymers containing imbedded side-chain functionalities. In this work, the synthesis of well-defined multifunctional fluorinated polymers bearing pendant pyrrolidinone groups, and block copolymers bearing both pyrrolidinone and alkenyl groups on different segments was achieved, by using RAFT polymerizations of unique bifunctional monomers. Upon micellization, the amphiphilic diblock copolymers were transformed into regioselectively-functionalized nanoparticles. Further transformations of pyrrolidinone- and alkene-dual functionalized-block copolymers into complex amphiphilic networks were accomplished by highly efficient UV-induced thiol-ene reactions. Whether as discrete nanoparticles or nanoscopically-segregated crosslinked networks, these materials have great potential for several diverse technologies, including as anti-fouling materials.

scholarly journals Preparation of well-defined 2D-lenticular aggregates by self-assembly of PNIPAM-b-PVDF amphiphilic diblock copolymers in solution

2021 ◽  
Author(s):  
Enrique Folgado ◽  
Matthias Mayor ◽  
Didier Cot ◽  
Michel Ramonda ◽  
Franck Godiard ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Dimethyl Carbonate ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Amphiphilic Diblock Copolymers

PNIPAM-b-PVDF amphiphilic block copolymers were synthesized via RAFT polymerization in dimethyl carbonate. These block copolymers were able to self-assemble into various morphologies such as spherical, crumpled, lamellar and lenticular 2D aggregates.

scholarly journals Synthesis and self-assembling amphiphilic diblock-copolymers of (2,3,4,5,6)-pentafluorostyrene

2019 ◽  
Vol 484 (4) ◽  
pp. 431-435
Author(s):  
K. E. Chekurov ◽  
A. I. Barabanova ◽  
I. V. Blagodatskikh ◽  
B. V. Lokshin ◽  
A. S. Peregudov ◽  
...  
Keyword(s):  
Diblock Copolymers ◽  
Microphase Separation ◽  
Raft Polymerization ◽  
Contact Angles ◽  
Hydroxyethyl Methacrylate ◽  
Water Contact ◽  
Self Assembling ◽  
Reversible Addition ◽  
Amphiphilic Diblock Copolymers ◽  
Large Water

Amphiphilic diblock-copolymers (DC) of (2,3,4,5,6)-pentafluorostyrene and 2-hydroxyethyl methacrylate were prepared for the first time by two-step reversible addition–fragmentation chain transfer (RAFT) polymerization. The morphology of films of diblock-copolymers that have a composition close to equimolar was studied by transmission electron microscopy. The observed microphase separation and formation of spherical nanodomains is not typical for equimolar diblock-copolymers and seems to result from hydrogen bonding between the hydroxyl and carbonyl groups (OH···OH and C=O···HO) in poly(2-hydroxyethyl methacrylate) blocks. Obviously, it is the ability of diblock-copolymers to self-organization is the cause of formation of fabric coatings with low surface energy (γ = 11.9 mJ/m2) and relatively large water contact angles (θН2О = 120±6°) and diiodmetane (θCH2I2 = 93±2°).

scholarly journals Micellar nanoparticles with tuneable morphologies through interactions between nucleobase-containing synthetic polymers in aqueous solution

2016 ◽  
Vol 7 (25) ◽  
pp. 4254-4262 ◽  
Author(s):  
Zan Hua ◽  
Anaïs Pitto-Barry ◽  
Yan Kang ◽  
Nigel Kirby ◽  
Thomas R. Wilks ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Synthetic Polymers ◽  
Amphiphilic Diblock Copolymers ◽  
Micellar Nanoparticles

Herein, we report the preparation of nucleobase-containing synthetic amphiphilic diblock copolymers using RAFT polymerization.

scholarly journals Aqueous one-pot synthesis of well-defined zwitterionic diblock copolymers by RAFT polymerization: an efficient and environmentally-friendly route to a useful dispersant for aqueous pigments

2021 ◽  
Vol 23 (3) ◽  
pp. 1248-1258
Author(s):  
Shannon M. North ◽  
Steven P. Armes
Keyword(s):  
Iron Oxide ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Environmentally Friendly ◽  
Iron Oxide Particles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Highly Effective ◽  
Oxide Particles

An atom-efficient, wholly aqueous one-pot synthesis of zwitterionic diblock copolymers has been devised. Such copolymers can serve as highly effective aqueous dispersants for nano-sized transparent yellow iron oxide particles.

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