Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
Nanoscale. 2017 Nov 2;9(42):16128-16132. doi: 10.1039/c7nr03095a.
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.
在这里，我们展示了如何利用半导体纳米晶体（NCs）固有的光致氧化还原特性，对其界面上形成的动态超分子系统进行光驱动的可逆调节，而这些系统本身不会对光产生响应。这是通过将光活性氧化锌 NCs（ZnO NCs）与主客体化学的葫芦[8]脲（CB[8]）相结合来实现的，这为半导体辅助的超分子组装的光调制（SALSA）提供了一种途径，这里通过在 NC 冠上光生成二茂铁自由基阳离子（MV˙）及其进一步由 CB[8]大环增强的二聚化来介导。所报道的 SALSA 策略成功地应用于 NC 界面上的光控可逆组装过程，实现了从表面受限的离散 CB[8]主客体配合物中光触发释放客体分子。
