Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
Angew Chem Int Ed Engl. 2020 Jan 7;59(2):853-859. doi: 10.1002/anie.201911404. Epub 2019 Nov 27.
With the goal of imposing shape and structure on supramolecular gels, we combine a low-molecular-weight gelator (LMWG) with the polymer gelator (PG) calcium alginate in a hybrid hydrogel. By imposing thermal and temporal control of the orthogonal gelation methods, the system either forms an extended interpenetrating network or core-shell-structured gel beads-a rare example of a supramolecular gel formulated inside discrete gel spheres. The self-assembled LMWG retains its unique properties within the beads, such as remediating Pd and reducing it in situ to yield catalytically active Pd nanoparticles. A single PdNP-loaded gel bead can catalyse the Suzuki-Miyaura reaction, constituting a simple and easy-to-use reaction-dosing form. These uniquely shaped and structured LMWG-filled gel beads are a versatile platform technology with great potential in a range of applications.
为了在超分子凝胶中赋予其形状和结构，我们将低分子量凝胶剂（LMWG）与聚合物凝胶剂（PG）海藻酸钠结合在混合水凝胶中。通过对正交凝胶方法进行热和时间控制，该系统要么形成扩展的互穿网络，要么形成核壳结构的凝胶珠——这是在离散凝胶球中构建超分子凝胶的罕见实例。自组装的 LMWG 在珠粒内保留其独特的性质，例如修复 Pd 并就地将其还原为具有催化活性的 Pd 纳米颗粒。单个负载 PdNP 的凝胶珠可以催化 Suzuki-Miyaura 反应，构成一种简单易用的反应剂量形式。这些具有独特形状和结构的 LMWG 填充凝胶珠是一种多功能平台技术，在许多应用中具有巨大的潜力。
