Institute for Inorganic Chemistry, Karlsruher Institute of Technology (KIT), Engesserstrasse 15, 76131, Karlsruhe, Germany.
Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 18, 76131, Karlsruhe, Germany.
Angew Chem Int Ed Engl. 2017 Apr 24;56(18):4950-4954. doi: 10.1002/anie.201700718. Epub 2017 Apr 3.
We introduce the synthesis and in-depth characterization of platinum(II)-crosslinked single-chain nanoparticles (Pt -SCNPs) to demonstrate their application as a recyclable homogeneous catalyst. Specifically, a linear precursor copolymer of styrene and 4-(diphenylphosphino)styrene was synthesized via nitroxide-mediated polymerization. The triarylphosphine ligand moieties along the backbone allowed for the intramolecular crosslinking of single chains via the addition of [Pt(1,5-cyclooctadiene)Cl ] in dilute solution. The successful formation of well-defined Pt -SCNPs was evidenced by size exclusion chromatography, dynamic light scattering, nuclear magnetic resonance ( H, P{ H}, Pt), and diffusion-ordered spectroscopy. Finally, the activity of the Pt -SCNPs as homogeneous, yet recyclable catalyst was successfully demonstrated using the example of the amination of allyl alcohol.
我们介绍了铂(II)交联单链纳米粒子 (Pt-SCNPs) 的合成和深入表征，以展示它们作为可回收均相催化剂的应用。具体来说，通过氮氧自由基介导聚合合成了苯乙烯和 4-(二苯基膦基)苯乙烯的线性前体共聚物。沿主链的三芳基膦配体部分允许通过在稀溶液中添加 [Pt(1,5-环辛二烯)Cl] 进行单链的分子内交联。尺寸排阻色谱、动态光散射、核磁共振 (H、P{H}、Pt) 和扩散有序光谱证明了具有良好定义的 Pt-SCNPs 的成功形成。最后，通过烯丙醇的胺化反应成功地证明了 Pt-SCNPs 作为均相但可回收催化剂的活性。
