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Hollow nanostructures from self-assembled supramolecular metallo-triblock copolymers
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Moughton, Adam O., Stubenrauch, Kurt and O'Reilly, Rachel K. (2009) Hollow nanostructures from self-assembled supramolecular metallo-triblock copolymers. Soft Matter, Vol.5 (No.12). pp. 2361-2370. doi:10.1039/b818955b ISSN 1744-683X.
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Official URL: http://dx.doi.org/10.1039/b818955b
Abstract
A reversible addition fragmentation chain transfer (RAFT) agent functionalised with an SCS 'pincer' ligand was synthesised and shown to control the polymerisation of methyl acrylate to afford chain-end pincer-functionalised poly(methyl acrylate) (PMA). This was then chain-extended with tert-butyl acrylate ((t)BuA) to afford a diblock (P(t)BuA-b-PMA) end-functionalised with a pincer ligand, with good control over the resultant polymer's molecular weight and polydispersity. This diblock copolymer was chain-end-complexed using a palladium(II) precursor and then deprotected to afford a diblock copolymer chain-end-functionalised with an amphiphilic pincer ligand Pd(II) complex (PAA-b-PMA-Pd). The chain-end binding of this polymer with a second, pyridine-end-functionalised poly(styrene) (PS) block proceeded in a facile manner using recently established chemistries to afford an unsymmetrical amphiphilic metallo-triblock copolymer (PAA-b-PMA-Pd-PS). The self-assembly of this triblock copolymer into monodisperse layered non-covalently connected micelles (NCCMs) and non-covalently connected nanoparticles (NCCNs) via covalent shell crosslinking was evidenced by DLS, TEM and AFM analysis. The hydrophobic PS core domain was then detached from the shell crosslinked layer via protonation of the pyridine moiety at low pH and the core was removed via dialysis to give hollow cage-like nanostructures whose interiors retain their hydrophobicity and contain functional Pd(II) complexes.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Nanostructured materials, Self-assembly (Chemistry), Diblock copolymers, Micelles, Addition polymerization | ||||
Journal or Publication Title: | Soft Matter | ||||
Publisher: | Royal Society of Chemistry | ||||
ISSN: | 1744-683X | ||||
Official Date: | 2009 | ||||
Dates: |
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Volume: | Vol.5 | ||||
Number: | No.12 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 2361-2370 | ||||
DOI: | 10.1039/b818955b | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Royal Society (Great Britain), Interdisciplinary Research Collaboration in Nanotechnology, Engineering and Physical Sciences Research Council (EPSRC), Downing College (University of Cambridge) |
Data sourced from Thomson Reuters' Web of Knowledge
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