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Photo-induced interfacial electron transfer of ZnO nanocrystals to control supramolecular assembly in water

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Abstract

Herein, we show how the inherent light-induced redox properties of semiconducting nanocrystals (NCs) can be utilized for the photo-driven reversible modulation of dynamic supramolecular systems formed at their interfaces that, on their own, do not respond to light. This was achieved by the unprecedented combination of photoactive zinc oxide NCs (ZnO NCs) with a host–guest chemistry of cucurbit[8]uril (CB[8]) providing a route to the semiconductor-assisted light modulation of supramolecular assemblies (SALSA), here mediated by the photo-generation of viologen radical cations (MV˙+) at the NC corona and their further dimerization enhanced by CB[8] macrocycles. The reported SALSA strategy was successfully applied for light-controlled reversible assembly processes at NC interfaces enabling light-triggered release of guest molecules from surface confined discrete CB[8] host–guest complexes.

Graphical abstract: Photo-induced interfacial electron transfer of ZnO nanocrystals to control supramolecular assembly in water

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Publication details

The article was received on 01 May 2017, accepted on 15 Sep 2017 and first published on 22 Sep 2017


Article type: Communication
DOI: 10.1039/C7NR03095A
Citation: Nanoscale, 2017, Advance Article
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    Photo-induced interfacial electron transfer of ZnO nanocrystals to control supramolecular assembly in water

    A. M. Cieślak, E. Janeček, K. Sokołowski, T. Ratajczyk, M. K. Leszczyński, O. A. Scherman and J. Lewiński, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR03095A

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