Regulation of the self-assembly morphology of azobenzene-bearing double hydrophobic block copolymers in aqueous solution by shifting the dynamic host–guest complexation

2015 ◽  
Vol 6 (12) ◽  
pp. 2214-2225 ◽  
Author(s):  
Zai-Zai Tong ◽  
Rui-Yang Wang ◽  
Jie Huang ◽  
Jun-Ting Xu ◽  
Zhi-Qiang Fan
Keyword(s):  
Aqueous Solution ◽  
Block Copolymers ◽  
Self Assembly ◽  
The Self ◽  
Complexation Equilibrium ◽  
Micellar Morphology

The complexation equilibrium between azo and β-CD can be shifted by various methods, thus the micellar morphology of azo-bearing block copolymers is altered.

scholarly journals Tannic Acid-Mediated Aggregate Stabilization of Poly(N-vinylpyrrolidone)-b-poly(oligo (ethylene glycol) methyl ether methacrylate) Double Hydrophilic Block Copolymers

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 662 ◽  
Author(s):  
Al Nakeeb ◽  
Nischang ◽  
Schmidt
Keyword(s):  
Aqueous Solution ◽  
Block Copolymers ◽  
Ethylene Glycol ◽  
Tannic Acid ◽  
Self Assembly ◽  
The Self ◽  
Covalent Crosslinking ◽  
Double Hydrophilic Block Copolymers ◽  
Concentration Dependency ◽  
Glycol Methyl Ether

The self-assembly of block copolymers in aqueous solution is an important field in modern polymer science that has been extended to double hydrophilic block copolymers (DHBC) in recent years. In here, a significant improvement of the self-assembly process of DHBC in aqueous solution by utilizing a linear-brush macromolecular architecture is presented. The improved self-assembly behavior of poly(N-vinylpyrrolidone)-b-poly(oligo(ethylene glycol) methyl ether methacrylate) (PVP-b-P(OEGMA)) and its concentration dependency is investigated via dynamic light scattering (DLS) (apparent hydrodynamic radii ≈ 100–120 nm). Moreover, the DHBC assemblies can be non-covalently crosslinked with tannic acid via hydrogen bonding, which leads to the formation of small aggregates as well (apparent hydrodynamic radius ≈ 15 nm). Non-covalent crosslinking improves the self-assembly and stabilizes the aggregates upon dilution, reducing the concentration dependency of aggregate self-assembly. Additionally, the non-covalent aggregates can be disassembled in basic media. The presence of aggregates was studied via cryogenic scanning electron microscopy (cryo-SEM) and DLS before and after non-covalent crosslinking. Furthermore, analytical ultracentrifugation of the formed aggregate structures was performed, clearly showing the existence of polymer assemblies, particularly after non-covalent crosslinking. In summary, we report on the completely hydrophilic self-assembled structures in solution formed from fully biocompatible building entities in water.

scholarly journals Self-Assembled Nanomaterials Based on Complementary Sn(IV) and Zn(II)-Porphyrins, and Their Photocatalytic Degradation for Rhodamine B Dye

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3598
Author(s):  
Nirmal K. Shee ◽  
Hee-Joon Kim
Keyword(s):  
Aqueous Solution ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Self Assembly ◽  
The Self ◽  
Assembly Process ◽  
Absorption Bands ◽  
Ligand Coordination ◽  
Rhodamine B Dye ◽  
Metal Ligand

A series of porphyrin triads (1–6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal–ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV–vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles.

Self-Assembly of Single Chain Janus Nanoparticles from Azobenzene-Containing Block Copolymers and Reversible Photoinduced Morphology Transition

2021 ◽  
Author(s):  
Wei Wen ◽  
Aihua Chen
Keyword(s):  
Block Copolymers ◽  
Experimental Research ◽  
Self Assembly ◽  
The Self ◽  
Single Chain ◽  
Morphology Transition ◽  
Janus Nanoparticles ◽  
Assembly Behavior

Self-assembly of amphiphilic single chain Janus nanoparticles (SCJNPs) is a novel and promising approach to fabricate assemblies with diversified morphologies. However, the experimental research of the self-assembly behavior of SCJNPs...

Coarse-grained simulation of the self-assembly of lipid vesicles concomitantly with novel block copolymers with multiple tails

Soft Matter ◽  
2021 ◽  
Author(s):  
Alexander Kantardjiev
Keyword(s):  
Molecular Dynamics ◽  
Block Copolymers ◽  
Self Assembly ◽  
Lipid Vesicles ◽  
The Self ◽  
Coarse Grained ◽  
Copolymer Concentration ◽  
Copolymer Structure ◽  
Coarse Grained Molecular Dynamics

We carried out a series of coarse-grained molecular dynamics liposome-copolymer simulations with varying extent of copolymer concentration in an attempt to understand the effect of copolymer structure and concentration on vesicle self-assembly and stability.

Nanofiber micelles from the self-assembly of block copolymers

2010 ◽  
Vol 28 (2) ◽  
pp. 84-92 ◽  
Author(s):  
Jieshu Qian ◽  
Meng Zhang ◽  
Ian Manners ◽  
Mitchell A. Winnik
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
The Self

Large Pore Size Nanoporous Materials from the Self-Assembly of Asymmetric Bottlebrush Block Copolymers

Nano Letters ◽  
2011 ◽  
Vol 11 (3) ◽  
pp. 998-1001 ◽  
Author(s):  
Justin Bolton ◽  
Travis S. Bailey ◽  
Javid Rzayev
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Self Assembly ◽  
Nanoporous Materials ◽  
The Self ◽  
Large Pore ◽  
Large Pore Size
Sign in / Sign up

Export Citation Format

Share Document