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Title

Facile access to completely deuterated single-chain nanoparticles enabled by intramolecular azide photodecomposition

AuthorsRubio-Cervilla, Jon; Malo de Molina, Paula; Robles-Hernández, Beatriz; Arbe, Arantxa ; Moreno, Angel J.; Alegría, Ángel ; Colmenero, Juan; Pomposo, José A.
KeywordsAzides
Folding/collapse
Neutron scattering
Perdeuteration
Single‐chain nanoparticles
Issue DateMay-2019
PublisherJohn Wiley & Sons
CitationMacromolecular Rapid Communications 40(9): 1900046 (2019)
AbstractAccess to completely deuterated single-chain nanoparticles (dSCNPs) has remained an unresolved issue. Herein, the first facile and efficient procedure to produce dSCNPs is reported, which comprises: i) the use of commercially available perdeuterated cyclic ether monomers as starting reagents, ii) a ring-opening copolymerization process performed in bulk to produce a neat dSCNP precursor, iii) a standard azidation reaction to decorate this precursor with azide moieties, and iv) a facile intramolecular azide photodecomposition step carried out under UV irradiation at high dilution providing with highly valuable, completely deuterated soft nano-objects from the precursor. dSCNPs are used to investigate by means of neutron-scattering measurements the form factor (radius of gyration, scaling exponent) of polyethylene oxide (PEO) chains in nanocomposites with different amounts of dSCNPs. Moreover, to illustrate the possibilities offered by the synthetic route disclosed in this communication for potential applications, the significant reduction in viscosity observed in a pure melt of polyether-based single-chain nanoparticles when compared to a melt of the corresponding linear polymer chains is shown.
Publisher version (URL)http://dx.doi.org/10.1002/marc.201900046
URIhttp://hdl.handle.net/10261/203523
DOI10.1002/marc.201900046
Identifiersdoi: 10.1002/marc.201900046
e-issn: 1521-3927
issn: 1022-1336
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