Thermoresponsive core–shell nanoparticles with cross-linked π-conjugate core based on amphiphilic block copolymers by RAFT polymerization and palladium-catalyzed coupling reactions

Polymer ◽  
2014 ◽  
Vol 55 (23) ◽  
pp. 6025-6035 ◽  
Author(s):  
Yohei Abiko ◽  
Aiko Matsumura ◽  
Kazuhiro Nakabayashi ◽  
Hideharu Mori
Keyword(s):  
Block Copolymers ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Core Shell ◽  
Coupling Reactions ◽  
Shell Nanoparticles ◽  
Palladium Catalyzed ◽  
Core Shell Nanoparticles

scholarly journals Assembly and Characterization of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Alexander Marras ◽  
Jeffrey Vieregg ◽  
Matthew Tirrell
Keyword(s):  
Block Copolymers ◽  
Polyelectrolyte Complex ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Representative Data ◽  
Core Shell Nanoparticles ◽  
Complex Micelles

We provide protocols and representative data for designing, assembling, and characterizing polyelectrolyte complex micelles (core-shell nanoparticles formed by polyelectrolytes and hydrophilic charged-uncharged block copolymers).

One-Pot Endgroup-Modification of Hydrophobic RAFT Polymers with Cyclodextrin by Thiol-ene Chemistry and the Subsequent Formation of Dynamic Core–Shell Nanoparticles Using Supramolecular Host–Guest Chemistry

2012 ◽  
Vol 65 (8) ◽  
pp. 1095 ◽  
Author(s):  
Firdaus Yhaya ◽  
Sandra Binauld ◽  
Manuela Callari ◽  
Martina H. Stenzel
Keyword(s):  
Raft Polymerization ◽  
Particle Surface ◽  
Terminal Group ◽  
Solid Particles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
One Pot ◽  
Subsequent Formation ◽  
Raft Agent ◽  
Core Shell Nanoparticles

Poly(methyl methacrylate) PMMA, synthesized using reversible addition fragmentation chain transfer (RAFT) polymerization, was heated in a solvent at 100°C for 24 h leading to the loss of the RAFT endfunctionality and the complete conversion into a vinyl group. Mono(6-deoxy-6-mercapto)-β-cyclodextrin (β-CD-SH) was subsequently clicked onto the polymer by a thiol-ene reaction leading to PMMA with one β-CD as a terminal group (PMMA70–β-CD). Meanwhile, a RAFT agent with an adamantyl group has been prepared for the polymerization of 2-hydroxyethyl acrylate (HEA) leading to PHEA95–Ada. Two processes were employed to generate core–shell nanoparticles from these two polymers: a one-step approach that employs a solution of both polymers at stoichiometric amounts in DMF, followed by the addition of water, and a two step process that uses PMMA solid particles with surface enriched with β-CD in water, which have a strong tendency to aggregate, followed by the addition of PHEA95–Ada in water. Both pathways led to stable core–shell nanoparticles of ~150 nm in size. Addition of free β-CD competed with the polymer bound β-CD releasing the PHEA hairs from the particle surface. As a result, the PMMA particles started agglomerating resulting in a cloudy solution. A similar effect was observed when heating the solution. Since the equilibrium constant between β-CD and adamantane decreases with increasing temperature, the stabilizing PHEA chains cleaved from the surface and the solution turned cloudy due to the aggregation of the naked PMMA spheres. This process was reversible and with decreasing temperature the core–shell nanoparticles formed again leading to a clear solution.

scholarly journals Assembly and Characterization of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Alexander Marras ◽  
Jeffrey Vieregg ◽  
Matthew Tirrell
Keyword(s):  
Block Copolymers ◽  
Polyelectrolyte Complex ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Representative Data ◽  
Core Shell Nanoparticles ◽  
Complex Micelles

We provide protocols and representative data for designing, assembling, and characterizing polyelectrolyte complex micelles (core-shell nanoparticles formed by polyelectrolytes and hydrophilic charged-uncharged block copolymers).

Isoniazid loaded core shell nanoparticles derived from PLGA–PEG–PLGA tri-block copolymers: In vitro and in vivo drug release

2013 ◽  
Vol 104 ◽  
pp. 107-115 ◽  
Author(s):  
Mani Gajendiran ◽  
Venkatachalam Gopi ◽  
Vellaichamy Elangovan ◽  
Rajagopalan Venkatakrishna Murali ◽  
Sengottuvelan Balasubramanian
Keyword(s):  
Block Copolymers ◽  
Drug Release ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Aggregates of the pentacenequinone derivative as reactors for the preparation of Ag@Cu2O core–shell NPs: an active photocatalyst for Suzuki and Suzuki type coupling reactions

2015 ◽  
Vol 51 (63) ◽  
pp. 12529-12532 ◽  
Author(s):  
Kamaldeep Sharma ◽  
Manoj Kumar ◽  
Vandana Bhalla
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Light Harvesting ◽  
Cross Coupling ◽  
Core Shell ◽  
Coupling Reactions ◽  
Shell Nanoparticles ◽  
Cross Coupling Reactions ◽  
Type Coupling ◽  
Core Shell Nanoparticles

Aggregates of the pentacenequinone derivative stabilized Ag@Cu2O core–shell nanoparticles (NPs) enabled efficient visible light harvesting to catalyse the palladium free Suzuki–Miyaura and Suzuki type cross coupling reactions at room temperature.

Core–shell nanoparticles: synthesis and applications in catalysis and electrocatalysis

2015 ◽  
Vol 44 (21) ◽  
pp. 7540-7590 ◽  
Author(s):  
Manoj B. Gawande ◽  
Anandarup Goswami ◽  
Tewodros Asefa ◽  
Huizhang Guo ◽  
Ankush V. Biradar ◽  
...  
Keyword(s):  
Oxygen Storage ◽  
Core Shell ◽  
Coupling Reactions ◽  
Organic Transformations ◽  
Shell Nanoparticles ◽  
Oxidation Reduction ◽  
Nanoparticles Synthesis ◽  
Core Shell Nanoparticles

Core–shell nanomaterials with a broad range of catalytic and electrocatalytic applications are summarized for an array of organic transformations namely oxidation, reduction, oxygen storage, and coupling reactions.

Synthesis and characterization of silica-polyvinyl imidazole core-shell nanoparticles via combination of RAFT polymerization and grafting-to method

2017 ◽  
Vol 28 (12) ◽  
pp. 1884-1891 ◽  
Author(s):  
Jafar Ettehadi Gargari ◽  
Alireza Shakeri ◽  
Hossein Sid Kalal ◽  
Alireza Khanchi ◽  
Hamid Rashedi
Keyword(s):  
Raft Polymerization ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles
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