Cylindrical Micelles by the Self-Assembly of Crystalline-b-Coil Polyphosphazene-b-P2VP Block Copolymers. Stabilization of Gold Nanoparticles
| Autor: | Raquel de la Campa, Carlos Díaz, María Luisa Valenzuela, Gabino A. Carriedo, Maria de los Angeles Cortes, Alejandro Presa Soto |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
micelles Macromolecular Substances Polymers Metal Nanoparticles Pharmaceutical Science Micelle Article Polymerization Analytical Chemistry lcsh:QD241-441 chemistry.chemical_compound P2VP Organophosphorus Compounds lcsh:Organic chemistry Drug Discovery Polymer chemistry Copolymer Polyphosphazene Particle Size Physical and Theoretical Chemistry cylindrical micelles Phosphazene Tetrahydrofuran Organic Chemistry Cationic polymerization polyphosphazene self-assembly block copolymers crystallization-driven self-assembly Anionic addition polymerization chemistry Chemistry (miscellaneous) gold nanoparticles Solvents Molecular Medicine Polyvinyls Gold Self-assembly Crystallization |
| Zdroj: | Molecules Scopus Molecules, Vol 24, Iss 9, p 1772 (2019) RUO. Repositorio Institucional de la Universidad de Oviedo instname Volume 24 Issue 9 |
| ISSN: | 1420-3049 |
| Popis: | During the last number of years a variety of crystallization-driven self-assembly (CDSA) processes based on semicrystalline block copolymers have been developed to prepare a number of different nanomorphologies in solution (micelles). We herein present a convenient synthetic methodology combining: (i) The anionic polymerization of 2-vinylpyridine initiated by organolithium functionalized phosphane initiators (ii) the cationic polymerization of iminophosphoranes initiated by &ndash PR2Cl2 and (iii) a macromolecular nucleophilic substitution step, to prepare the novel block copolymers poly(bistrifluoroethoxy phosphazene)-b-poly(2-vinylpyridine) (PTFEP-b-P2VP), having semicrystalline PTFEP core forming blocks. The self-assembly of these materials in mixtures of THF (tetrahydrofuran) and 2-propanol (selective solvent to P2VP), lead to a variety of cylindrical micelles of different lengths depending on the amount of 2-propanol added. We demonstrated that the crystallization of the PTFEP at the core of the micelles is the main factor controlling the self-assembly processes. The presence of pyridinyl moieties at the corona of the micelles was exploited to stabilize gold nanoparticles (AuNPs). |
| Databáze: | OpenAIRE |
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