Organic-inorganic hybrid nanoparticles via photoinduced micellation and siloxane core cross-linking of stimuli-responsive copolymers

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DOIResolve DOI: http://doi.org/10.1021/mz3006439
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TypeArticle
Journal titleACS Macro Letters
ISSN2161-1653
Volume2
Issue2
Pages121124; # of pages: 4
AbstractPhotoacid-induced siloxane cross-linking of stimuli-responsive copolymer micelles allows the synthesis of well-defined organic-inorganic hybrid nanoparticles. Two conceptually different synthetic approaches are presented, both via photoinduced cross-linking of poly(4-hydroxystyrene-block-styrene) micelles and via one-pot photoacid-catalyzed micelle formation and siloxane cross-linking of poly(4-tert-butoxystyrene-block-styrene). The multistep synthetic route showed intermicellar cross-linking leading to agglomerates. In contrast to this, the formation of the nanoparticles via the one-pot synthesis yielded well-defined structures. The use of different siloxane cross-linking agents and their effects on the properties of the cross-linked micellar structures have been evaluated. Scanning electron microscopy and differential scanning calorimetry indicate rigid core cross-linked nanoparticles. Their size, molar mass, and swelling behavior were analyzed by dynamic and static light scattering. Cyclic siloxane cross-linking agents lead to residual Cî - C double bonds within the nanoparticle core that allow postsynthetic modification by, e.g., thiol-ene click reactions. © 2013 American Chemical Society.
Publication date
LanguageEnglish
Peer reviewedYes
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NPARC number21270520
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Record identifier82e03e2f-a893-4300-bd33-ded3b2a0bc43
Record created2014-02-14
Record modified2016-05-09
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