1137725-46-2Relevant articles and documents
PEGylated gold nanoparticles functionalized with β-cyclodextrin inclusion complexes: Towards metal nanoparticle-polymer-carbohydrate cluster biohybrid materials
Liu, Jingquan,Setijadi, Eki,Liu, Yingkai,Whittaker, Michael R.,Boyer, Cyrille,Davis, Thomas P.
, p. 1245 - 1250 (2010)
A cholesterol-functional trithiocarbonate reversible additionfragmentation chain transfer (RAFT) agent was synthesized and employed to generate well-defined poly(polyethylene glycol) acrylate with cholesterol chain termini using RAFT polymerization. Subsequently, the polymers were grafted onto the surface of gold nanoparticles using the trithiocarbonate functionality to bind to the gold surface. The cholesterol moieties were then modified via complexation with β-cyclodextrin. The step-by-step modification of gold nanoparticles was characterized by dynamic light scattering, attenuated total reflection infrared spectroscopy and surface plasmon resonance analysis. CSIRO 2010.
Temperature responsive polymer-supported TEMPO: An efficient and recoverable catalyst for the selective oxidation of alcohols
Chen, Tao,Xu, Zhenkai,Zhou, Lei,Hua, Laiyu,Zhang, Shuo,Wang, Jiping
, p. 419 - 422 (2019)
This study aimed to combine the advantages of homogeneous catalysis and heterogeneous catalysis by immobilizing TEMPO into a water-soluble temperature responsive polymer. The supported TEMPO was water soluble and displayed excellent activity in the selective oxidation of alcohols below the LCST and can be easily recovered.
Biomimetic functionalization of carbon nanotubes with poly(ionic liquids) for highly efficient adsorption of organic dyes
Yang, Guang,Huang, Qiang,Gan, Defu,Huang, Hongye,Chen, Junyu,Deng, Fengjie,Liu, Meiying,Wen, Yuanqing,Zhang, Xiaoyong,Wei, Yen
, (2019)
The removal of environmental pollutants from wastewater through adsorption has regarded as one of the most efficient methods. A number of adsorbents based on nanomaterials and their composites have been examined for this purpose. Among them, carbon nanotubes (CNT) should be one of the promising candidates owing to their small size, large π conjugation system and high specific surface areas, however, the performance of CNT for adsorption is largely impeded by their poor dispersibility and lack of functional groups. Therefore, the development of simple and effective surface modification strategies to overcome the above drawbacks should be of great importance for their practical utilization in the environmental fields. In this study, a novel and simple biomimetic method was reported for the first time for surface modification of CNT with poly(ionic liquids) through the combination of mussel-inspired chemistry and subsequent surface-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization. An ionic liquid ([C16VIm+] [Br?]) was used as the monomer in this work because it is capable of introducing charged functional groups on the surface of CNT and thus boosts their adsorption performance towards environmental pollutants. As a model organic dye, Congo red (CR) was selected as the environmental pollutant and its adsorption behaviors of CR by CNT?IL composites were examined and analyzed in details. The results demonstrated that the adsorption capacity of CNT?IL intake CR (50 mg L?1) was obvious higher than that of unmodified CNT and the adsorption capacity reaches 178 mg g?1 with pH = 7 at 56 min. In addition, adsorption kinetic models and isotherm models were investigated to identify the adsorption kinetic rates and adsorption behavior, respectively. The adsorption principle that including electrostatic interaction, π-π interaction between imidazole rings on the surface of CNT?IL and CR, was proposed. This novel biomimetic surface modification could also be utilized for fabrication of many other functional materials with designable properties and improved performance. Therefore, this work will open up a new research avenue for the fabrication of multifunctional CNT based polymer composites.
Poly(sarcosine)-Based Nano-Objects with Multi-Protease Resistance by Aqueous Photoinitiated Polymerization-Induced Self-Assembly (Photo-PISA)
Varlas, Spyridon,Georgiou, Panagiotis G.,Bilalis, Panayiotis,Jones, Joseph R.,Hadjichristidis, Nikos,O'Reilly, Rachel K.
, p. 4453 - 4462 (2018)
Poly(sarcosine) (PSar) is a non-ionic hydrophilic polypeptoid with numerous biologically relevant properties, making it an appealing candidate for the development of amphiphilic block copolymer nanostructures. In this work, the fabrication of poly(sarcosine)-based diblock copolymer nano-objects with various morphologies via aqueous reversible addition-fragmentation chain-transfer (RAFT)-mediated photoinitiated polymerization-induced self-assembly (photo-PISA) is reported. Poly(sarcosine) was first synthesized via ring-opening polymerization (ROP) of sarcosine N-carboxyanhydride, using high-vacuum techniques. A small molecule chain transfer agent (CTA) was then coupled to the active ω-amino chain end of the telechelic polymer for the synthesis of a poly(sarcosine)-based macro-CTA. Controlled chain-extensions of a commercially available water-miscible methacrylate monomer (2-hydroxypropyl methacrylate) were achieved via photo-PISA under mild reaction conditions, using PSar macro-CTA. Upon varying the degree of polymerization and concentration of the core-forming monomer, morphologies evolving from spherical micelles to worm-like micelles and vesicles were accessed, as determined by dynamic light scattering and transmission electron microscopy, resulting in the construction of a detailed phase diagram. The resistance of both colloidally stable empty vesicles and enzyme-loaded nanoreactors against degradation by a series of proteases was finally assessed. Overall, our findings underline the potential of poly(sarcosine) as an alternative corona-forming polymer to poly(ethylene glycol)-based analogues of PISA assemblies for use in various pharmaceutical and biomedical applications.
