PDEGMA‐b‐PDIPAEMA copolymers via RAFT polymerization and their pH and thermoresponsive schizophrenic self‐assembly in aqueous media

2020 ◽  
Vol 58 (13) ◽  
pp. 1867-1880
Author(s):  
Dimitrios Selianitis ◽  
Stergios Pispas
RSC Advances ◽  
2017 ◽  
Vol 7 (39) ◽  
pp. 24522-24536 ◽  
Author(s):  
N. S. Serkhacheva ◽  
O. I. Smirnov ◽  
A. V. Tolkachev ◽  
N. I. Prokopov ◽  
A. V. Plutalova ◽  
...  

Hydrophilic and amphiphilic polymeric trithiocarbonates based on polyacrylic acid are able to provide polymerization-induced self-assembly in copolymerization of butyl and fluoroalkyl acrylates.


2015 ◽  
Vol 7 (6) ◽  
pp. 2738-2746 ◽  
Author(s):  
Zhao Wang ◽  
Zhongkui Yang ◽  
Tao Gao ◽  
Jingwen He ◽  
Laijiang Gong ◽  
...  

An amphiphilic block copolymer-based colorimetric and fluorescent chemosensor for Hg2+was prepared, which was synthesized by sequential RAFT polymerization of NIPAM and R6GDM (a novel Hg2+-sensitive rhodamine monomer).


2017 ◽  
Vol 8 (31) ◽  
pp. 4538-4547 ◽  
Author(s):  
Athanasios Skandalis ◽  
Stergios Pispas

Novel PDMAEMA-b-PLMA-b-POEGMA triblock terpolymers were synthesized by RAFT polymerization. Triblock polyelectrolytes were obtained by quaternization. PDMAEMA-b-PLMA-b-POEGMA and QPDMAEMA-b-PLMA-b-POEGMA terpolymers self-assemble into spherical micelles with a mixed corona in aqueous media.


2017 ◽  
Vol 8 (28) ◽  
pp. 4098-4107 ◽  
Author(s):  
Wenhao Qian ◽  
Tao Song ◽  
Mao Ye ◽  
Peicheng Xu ◽  
Guolin Lu ◽  
...  

This article reports the synthesis of a PAA-g-PLA amphiphilic polymer by the combination of RAFT polymerization and organocatalytic ROP, which could self-assemble into spheres in aqueous media for sustained release of doxorubicin.


Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1382 ◽  
Author(s):  
Despoina Giaouzi ◽  
Stergios Pispas

In this work, the synthesis, selective chemical modifications, and self-assembly behavior in aqueous media of a novel poly(2-(dimethylamino)ethyl acrylate)20-b-poly(N-isopropylacrylamide)11-b-poly(oligo ethylene glycol methyl ether acrylate)18 (PDMAEA20-b-PNIPAM11-b-POEGA18) dual-responsive (pH and temperature) and triply hydrophilic amino-based triblock terpolymer are reported. The amine functional triblock terpolymer was synthesized by sequential reversible addition fragmentation chain transfer polymerization (RAFT) polymerization and molecularly characterized by size exclusion chromatography (SEC) and 1H-NMR spectroscopy that evidenced the success of the three-step polymerization scheme. The tertiary amine pendant groups of the PDMAEA block were chemically modified in order to produce the Q1PDMAEA20-b-PNIPAM11-b-POEGA18 as well as the Q6PDMAEA20-b-PNIPAM11-b-POEGA18 quaternized triblock terpolymers (Q1 and Q6 prefixes show the number of carbon atoms (C1 and C6) attached on the PDMAEA groups) using methyl iodide (CH3I) and 1-iodohexane (C6H13I) as the quaternizing agents and the SPDMAEA20-b-PNIPAM11-b-POEGA18 sulfobetainized triblock terpolymer using 1,3 propanesultone (C3H6O3S) as the sulfobetainization agent. The self-assembly properties of the triblock terpolymers in aqueous solutions upon varying temperature and solution pH were studied by light scattering and fluorescence spectroscopy experiments. The novel triblock terpolymers self-assemble into nanosized aggregates upon solution temperature rise above the nominal lower critical solution temperature (LCST) of the temperature-responsive PNIPAM block. The remarkable stimuli-responsive self-assembly behavior of the novel triblock terpolymers in aqueous media make them interesting candidates for biomedical applications in the fields of drug and gene delivery.


Author(s):  
Xiaoya Peng ◽  
Dan Li ◽  
Yuanting Li ◽  
Haibo Xing ◽  
Wei Deng

Antibiotic contaminants in aqueous media pose serious threat to human and ecological environments. Therefore, it is necessary to develop robust strategies to detect antibiotic residues. For this purpose, a self-assembly...


2020 ◽  
Vol 2020 ◽  
pp. 1-24 ◽  
Author(s):  
Carmen Cretu ◽  
Loredana Maiuolo ◽  
Domenico Lombardo ◽  
Elisabeta I. Szerb ◽  
Pietro Calandra

The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.


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