Zhang, ShuaiDomínguez, ZoeKhaleel, AssafNilam, MohamedThiele, ThomasPischel, UweSchedler, Uwe2019-06-072019-06-072018-12Zhang, S., Domínguez, Z., Assaf, K. I., Nilam, M., Thiele, T., Pischel, U., …Schedler, U. Precise supramolecular control of surface coverage densities on polymer micro- and nanoparticles. Chemical Science, 9(45), 8575–8581. (2018). DOI: https://doi.org/10.1039/c8sc03150a2041-6520http://hdl.handle.net/10272/16360We report herein the controlled surface functionalization of micro- and nanoparticles by supramolecular host–guest interactions. Our idea is to exploit the competition of two high-affinity guests for binding to the surface-bound supramolecular host cucurbit[7]uril (CB7). To establish our strategy, surface azide groups were introduced to hard-sphere (poly)methylmethacrylate particles with a grafted layer of poly(acrylic acid), and a propargyl derivative of CB7 was coupled to the surface by click chemistry. The amount of surface-bound CB7 was quantified with the high-affinity guest aminomethyladamantane (AMADA), which revealed CB7 surface coverage densities around 0.3 nmol cm 2 indicative of a 3D layer of CB7 binding sites on the surface. The potential for surface functionalization was demonstrated with an aminoadamantane-labeled rhodamine (Ada-Rho) as a second high-affinity guest. Simultaneous incubation of CB7-functionalized particles with both high-affinity guests, AMADA and Ada-Rho, revealed a simple linear relationship between the resulting surface coverage densities of the model fluorescent dye and the mole fraction of Ada-Rho in the incubation mixture. This suggests a highly modular supramolecular strategy for the stable immobilization of application-relevant molecules on particle surfaces and a precise control of their surface coverage densities.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Supramolecular controlPolymerNanoparticlesSurface coverage densitiesjournal article10.1039/c8sc03150aopen access