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Special Issue "Supramolecular Polymers and Their Assemblies"

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A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Material Sciences and Nanotechnology".

Deadline for manuscript submissions: closed (28 February 2015)

Special Issue Editors

Guest Editor
Prof. Dr. Graeme Cooke (Website)

Glasgow Centre for Physical Organic Chemistry, WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK
Fax: +441413304888
Interests: Design; synthesis and characterization of functional Molecules; macromolecules and nanoparticles and their assemblies
Guest Editor
Prof. Dr. Patrice Woisel (Website)

UMET (UMR8207), University of Lille Nord de France, ENSCL, Villeneuve d'Ascq Cedex, France
Interests: Synthesis and control of smart macromolecular assemblies; Stimuli-responsive surfaces; Smart titanium-based biomaterials

Special Issue Information

Dear Colleagues,

The development of supramolecular polymers over the last few decades has largely gone hand-in-hand with progress relating to the synthesis and characterization of new efficient and stimuli-responsive supramolecular building blocks. Great strides have been made in transforming these academically interesting macromolecules into assemblies with a range of applications, which concern advanced materials, medicine, and catalysis. In this Special Issue, we invite submissions focusing on new developments relating to the synthesis, self-assembly, and function of supramolecular polymers.

Prof. Dr. Graeme Cooke
Prof. Dr. Patrice Woisel
Guest Editor

Submission

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed Open Access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF.

Keywords

  • supramolecular polymers
  • self-assembly
  • molecular recognition
  • self-healing
  • stimuli-responsive

Published Papers (5 papers)

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Research

Open AccessArticle Novel Tertiary Amino Containing Blinding Composite Membranes via Raft Polymerization and Their Preliminary CO2 Permeation Performance
Int. J. Mol. Sci. 2015, 16(5), 9078-9096; doi:10.3390/ijms16059078
Received: 9 February 2015 / Revised: 19 March 2015 / Accepted: 10 April 2015 / Published: 23 April 2015
PDF Full-text (937 KB) | HTML Full-text | XML Full-text
Abstract
Facile synthesis of poly (N,N-dimethylaminoethyl methacrylate) (PDMAEMA) star polymers on the basis of the prepolymer chains, PDMAEMA as the macro chain transfer agent and divinyl benzene (DVB) as the cross-linking reagent by reversible addition-fragmentation chain transfer (RAFT) polymerization [...] Read more.
Facile synthesis of poly (N,N-dimethylaminoethyl methacrylate) (PDMAEMA) star polymers on the basis of the prepolymer chains, PDMAEMA as the macro chain transfer agent and divinyl benzene (DVB) as the cross-linking reagent by reversible addition-fragmentation chain transfer (RAFT) polymerization was described. The RAFT polymerizations of DMAEMA at 70 °C using four RAFT agents with different R and Z group were investigated. The RAFT agents used in these polymerizations were dibenzyl trithiocarbonate (DBTTC), s-1-dodecyl-s'-(α,α'-dimethyl-α-acetic acid) trithiocarbonate (MTTCD), s,s'-bis (2-hydroxyethyl-2'-dimethylacrylate) trithiocarbonate (BDATC) and s-(2-cyanoprop-2-yl)-s-dodecyltrithiocarbonate (CPTCD). The results indicated that the structure of the end-group of RAFT agents had significant effects on the ability to control polymerization. Compared with the above-mentioned RAFT agents, CPTCD provides better control over the molecular weight and molecular weight distribution. The polydispersity index (PDI) was determined to be within the scope of 1.26 to 1.36. The yields, molecular weight, and distribution of the star polymers can be tuned by changing the molar ratio of DVB/PDMAEMA-CPTCD. The chemical composition and structure of the linear and star polymers were characterized by GPC, FTIR, 1H NMR, XRD analysis. For the pure Chitosan membrane, a great improvement was observed for both CO2 permeation rate and ideal selectivity of the blending composite membrane upon increasing the content of SPDMAEMA-8. At a feed gas pressure of 37.5 cmHg and 30 °C, the blinding composite membrane (Cs: SPDMAEMA-8 = 4:4) has a CO2 permeation rate of 8.54 × 10−4 cm3 (STP) cm−2∙s−1∙cm∙Hg−1 and a N2 permeation rate of 6.76 × 10−5 cm3 (STP) cm−2∙s−1∙cm∙Hg−1, and an ideal CO2/N2 selectivity of 35.2. Full article
(This article belongs to the Special Issue Supramolecular Polymers and Their Assemblies)
Open AccessArticle Thermoresponsive Interplay of Water Insoluble Poly(2-alkyl-2-oxazoline)s Composition and Supramolecular Host–Guest Interactions
Int. J. Mol. Sci. 2015, 16(4), 7428-7444; doi:10.3390/ijms16047428
Received: 9 March 2015 / Revised: 26 March 2015 / Accepted: 27 March 2015 / Published: 2 April 2015
Cited by 2 | PDF Full-text (2867 KB) | HTML Full-text | XML Full-text
Abstract
A series of water insoluble poly[(2-ethyl-2-oxazoline)-ran-(2-nonyl-2-oxazoline)] amphiphilic copolymers was synthesized and their solubility properties in the presence of different supramolecular host molecules were investigated. The resulting polymer-cavitand assemblies exhibited a thermoresponsive behavior that could be modulated by variation of the [...] Read more.
A series of water insoluble poly[(2-ethyl-2-oxazoline)-ran-(2-nonyl-2-oxazoline)] amphiphilic copolymers was synthesized and their solubility properties in the presence of different supramolecular host molecules were investigated. The resulting polymer-cavitand assemblies exhibited a thermoresponsive behavior that could be modulated by variation of the copolymer composition and length. Interestingly, the large number of hydrophobic nonyl units across the polymer chain induced the formation of kinetically-trapped nanoparticles in solution. These nanoparticles further agglomerate into larger aggregates at a temperature that is dependent on the polymer composition and the cavitand type and concentration. The present research expands the understanding on the supramolecular interactions between water insoluble copolymers and supramolecular host molecules. Full article
(This article belongs to the Special Issue Supramolecular Polymers and Their Assemblies)
Figures

Open AccessArticle Revealing the Supramolecular Nature of Side-Chain Terpyridine-Functionalized Polymer Networks
Int. J. Mol. Sci. 2015, 16(1), 990-1007; doi:10.3390/ijms16010990
Received: 25 November 2014 / Accepted: 19 December 2014 / Published: 5 January 2015
Cited by 2 | PDF Full-text (1649 KB) | HTML Full-text | XML Full-text
Abstract
Nowadays, finely controlling the mechanical properties of polymeric materials is possible by incorporating supramolecular motifs into their architecture. In this context, the synthesis of a side-chain terpyridine-functionalized poly(2-(dimethylamino)ethyl methacrylate) is reported via reversible addition-fragmentation chain transfer polymerization. By addition of transition metal [...] Read more.
Nowadays, finely controlling the mechanical properties of polymeric materials is possible by incorporating supramolecular motifs into their architecture. In this context, the synthesis of a side-chain terpyridine-functionalized poly(2-(dimethylamino)ethyl methacrylate) is reported via reversible addition-fragmentation chain transfer polymerization. By addition of transition metal ions, concentrated aqueous solutions of this polymer turn into metallo-supramolecular hydrogels whose dynamic mechanical properties are investigated by rotational rheometry. Hence, the possibility for the material to relax mechanical constrains via dissociation of transient cross-links is brought into light. In addition, the complex phenomena occurring under large oscillatory shear are interpreted in the context of transient networks. Full article
(This article belongs to the Special Issue Supramolecular Polymers and Their Assemblies)
Figures

Open AccessArticle Protein/Arabinoxylans Gels: Effect of Mass Ratio on the Rheological, Microstructural and Diffusional Characteristics
Int. J. Mol. Sci. 2014, 15(10), 19106-19118; doi:10.3390/ijms151019106
Received: 18 June 2014 / Revised: 4 September 2014 / Accepted: 22 September 2014 / Published: 21 October 2014
Cited by 3 | PDF Full-text (3044 KB) | HTML Full-text | XML Full-text
Abstract
Wheat bran arabinoxylan (WBAX) gels entrapping standard model proteins at different mass ratios were formed. The entrapment of protein affected the gel elasticity and viscosity values, which decreased from 177 to 138 Pa. The presence of protein did not modify the covalent [...] Read more.
Wheat bran arabinoxylan (WBAX) gels entrapping standard model proteins at different mass ratios were formed. The entrapment of protein affected the gel elasticity and viscosity values, which decreased from 177 to 138 Pa. The presence of protein did not modify the covalent cross-links content of the gel. The distribution of protein through the network was investigated by confocal laser scanning microscopy. In mixed gels, protein aggregates forming clusters were detected at protein/polysaccharide ratios higher than 0.25. These clusters were not homogeneously distributed, suggesting that WBAX and protein are located in two different phases. The apparent diffusion coefficient (Dm) of proteins during release from mixed gels was investigated for mass ratios of 0.06 and 0.12. For insulin, Dm increased significantly from 2.64 × 107 to 3.20 × 107 cm2/s as the mass ratio augmented from 0.06 to 0.12. No significant difference was found for Dm values of ovalbumin and bovine serum albumin released from the mixed gels. The results indicate that homogeneous protein/WBAX gels can be formed at low mass ratios, allowing the estimation of Dm by using an analytical solution of the second Fick’s law. Full article
(This article belongs to the Special Issue Supramolecular Polymers and Their Assemblies)
Figures

Open AccessArticle Nanoparticle Encapsidation of Flock House Virus by Auto Assembly of Tobacco Mosaic Virus Coat Protein
Int. J. Mol. Sci. 2014, 15(10), 18540-18556; doi:10.3390/ijms151018540
Received: 8 July 2014 / Revised: 9 September 2014 / Accepted: 29 September 2014 / Published: 14 October 2014
Cited by 2 | PDF Full-text (820 KB) | HTML Full-text | XML Full-text
Abstract
Tobacco Mosaic virus (TMV) coat protein is well known for its ability to self-assemble into supramolecular nanoparticles, either as protein discs or as rods originating from the ~300 bp genomic RNA origin-of-assembly (OA). We have utilized TMV self-assembly characteristics to create a [...] Read more.
Tobacco Mosaic virus (TMV) coat protein is well known for its ability to self-assemble into supramolecular nanoparticles, either as protein discs or as rods originating from the ~300 bp genomic RNA origin-of-assembly (OA). We have utilized TMV self-assembly characteristics to create a novel Flock House virus (FHV) RNA nanoparticle. FHV encodes a viral polymerase supporting autonomous replication of the FHV genome, which makes it an attractive candidate for viral transgene expression studies and targeted RNA delivery into host cells. However, FHV viral genome size is strictly limited by native FHV capsid. To determine if this packaging restriction could be eliminated, FHV was adapted to express enhanced green fluorescent protein (GFP), to allow for monitoring of functional FHV RNA activity. Then TMV OA was introduced in six 3' insertion sites, with only site one supporting functional FHV GFP expression. To create nanoparticles, FHV GFP-OA modified genomic RNA was mixed in vitro with TMV coat protein and monitored for encapsidation by agarose electrophoresis and electron microscopy. The production of TMV-like rod shaped nanoparticles indicated that modified FHV RNA can be encapsidated by purified TMV coat protein by self-assembly. This is the first demonstration of replication-independent packaging of the FHV genome by protein self-assembly. Full article
(This article belongs to the Special Issue Supramolecular Polymers and Their Assemblies)

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