Zhang Su-Yun, Kochovski Zdravko, Lee Hui-Chun, Lu Yan, Zhang Hemin, Zhang Jie, Sun Jian-Ke, Yuan Jiayin
MOE Key Laboratory of Cluster Science , Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , P. R. China . Email:
Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie , 14109 Berlin , Germany.
Chem Sci. 2018 Nov 19;10(5):1450-1456. doi: 10.1039/c8sc04375b. eCollection 2019 Feb 7.
Exploration of metal clusters (MCs) adaptive to both aqueous and oil phases without disturbing their size is promising for a broad scope of applications. The state-of-the-art approach ligand-binding may perturb MCs' size due to varied metal-ligand binding strength when shuttling between solvents of different polarity. Herein, we applied physical confinement of a series of small noble MCs (<1 nm) inside ionic organic cages (I-Cages), which by means of anion exchange enables reversible transfer of MCs between aqueous and hydrophobic solutions without varying their ultrasmall size. Moreover, the MCs@I-Cage hybrid serves as a recyclable, reaction-switchable catalyst featuring high activity in liquid-phase NHBH (AB) hydrolysis reaction with a turnover frequency (TOF) of 115 min.
探索适用于水相和油相且不影响其尺寸的金属簇（MCs）在广泛的应用中具有广阔前景。目前最先进的配体结合方法，在不同极性溶剂之间穿梭时，由于金属 - 配体结合强度不同，可能会干扰MCs的尺寸。在此，我们将一系列小的贵金属MCs（<1 nm）物理限制在离子有机笼（I - 笼）内，通过阴离子交换，MCs能够在水相和疏水相溶液之间可逆转移，而不会改变其超小尺寸。此外，MCs@I - 笼杂化物作为一种可回收、反应可切换的催化剂，在液相硼氢化钠（AB）水解反应中具有高活性，周转频率（TOF）为115 min⁻¹ 。
