Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles
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: (...
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MDPI AG
2019-05-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/24/9/1772 |
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| author | Maria de los Angeles Cortes Raquel de la Campa Maria Luisa Valenzuela Carlos Díaz Gabino A. Carriedo Alejandro Presa Soto |
| author_facet | Maria de los Angeles Cortes Raquel de la Campa Maria Luisa Valenzuela Carlos Díaz Gabino A. Carriedo Alejandro Presa Soto |
| author_sort | Maria de los Angeles Cortes |
| collection | DOAJ |
| description | 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 −PR<sub>2</sub>Cl<sub>2</sub>; and (iii) a macromolecular nucleophilic substitution step, to prepare the novel block copolymers poly(bistrifluoroethoxy phosphazene)-<i>b</i>-poly(2-vinylpyridine) (PTFEP-<i>b</i>-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). |
| first_indexed | 2024-12-14T20:56:14Z |
| format | Article |
| id | doaj.art-70e4a9de0cc74cb3bfcf54120b04f490 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-14T20:56:14Z |
| publishDate | 2019-05-01 |
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| record_format | Article |
| series | Molecules |
| spelling | doaj.art-70e4a9de0cc74cb3bfcf54120b04f4902022-12-21T22:47:41ZengMDPI AGMolecules1420-30492019-05-01249177210.3390/molecules24091772molecules24091772Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold NanoparticlesMaria de los Angeles Cortes0Raquel de la Campa1Maria Luisa Valenzuela2Carlos Díaz3Gabino A. Carriedo4Alejandro Presa Soto5Department of Chemistry, School of Chemistry, University of Chile, 7800003 Santiago, ChileDepartment of Organic and Inorganic Chemistry (IUQOEM), School of Chemistry, University of Oviedo, 33006 Oviedo, SpainInorganic Chemistry and Molecular Material Center, Institute of Applied Chemistry Science, School of Engineering, University Autónoma de Chile, 8900000 Santiago, ChileDepartment of Chemistry, School of Chemistry, University of Chile, 7800003 Santiago, ChileDepartment of Organic and Inorganic Chemistry (IUQOEM), School of Chemistry, University of Oviedo, 33006 Oviedo, SpainDepartment of Organic and Inorganic Chemistry (IUQOEM), School of Chemistry, University of Oviedo, 33006 Oviedo, SpainDuring 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 −PR<sub>2</sub>Cl<sub>2</sub>; and (iii) a macromolecular nucleophilic substitution step, to prepare the novel block copolymers poly(bistrifluoroethoxy phosphazene)-<i>b</i>-poly(2-vinylpyridine) (PTFEP-<i>b</i>-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).https://www.mdpi.com/1420-3049/24/9/1772polyphosphazeneblock copolymersself-assemblymicellescylindrical micellesgold nanoparticlescrystallization-driven self-assemblyP2VP |
| spellingShingle | Maria de los Angeles Cortes Raquel de la Campa Maria Luisa Valenzuela Carlos Díaz Gabino A. Carriedo Alejandro Presa Soto Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles Molecules polyphosphazene block copolymers self-assembly micelles cylindrical micelles gold nanoparticles crystallization-driven self-assembly P2VP |
| title | Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles |
| title_full | Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles |
| title_fullStr | Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles |
| title_full_unstemmed | Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles |
| title_short | Cylindrical Micelles by the Self-Assembly of Crystalline-<i>b</i>-Coil Polyphosphazene-<i>b</i>-P2VP Block Copolymers. Stabilization of Gold Nanoparticles |
| title_sort | cylindrical micelles by the self assembly of crystalline i b i coil polyphosphazene i b i p2vp block copolymers stabilization of gold nanoparticles |
| topic | polyphosphazene block copolymers self-assembly micelles cylindrical micelles gold nanoparticles crystallization-driven self-assembly P2VP |
| url | https://www.mdpi.com/1420-3049/24/9/1772 |
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