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Small‐Sized Bimetallic CuPd Nanoclusters Encapsulated Inside Cavity of NH2‐UiO‐66(Zr) with Superior Performance for Light‐Induced Suzuki Coupling Reaction
Small Methods ( IF 10.7 ) Pub Date : 2018-08-14 , DOI: 10.1002/smtd.201800164
Dengrong Sun 1 , Mengpeng Xu 1 , Yongteng Jiang 1 , Jinlin Long 1 , Zhaohui Li 1
Affiliation  

Bimetallic CuPd nanoclusters with a small size of ≈0.9 nm are encapsulated inside cavities of NH2‐UiO‐66(Zr) via double‐solvent impregnation, followed by a reduction process with NaBH4. As compared with monometallic Pd@NH2‐UiO‐66(Zr), bimetallic CuPd@NH2‐UiO‐66(Zr) shows superior performance for light‐induced Suzuki coupling reaction since the introduced Cu acts as an electron mediator to facilitate the transfer of photogenerated electrons from light‐excited NH2‐UiO‐66(Zr) to Pd, to form electron‐rich Pd. Moreover, CuPd@NH2‐UiO‐66(Zr) also shows higher activity than CuPd/NH2‐UiO‐66(Zr), in which CuPd nanoparticles are deposited on the surface of NH2‐UiO‐66(Zr). The as‐obtained CuPd@NH2‐UiO‐66(Zr) is stable and can be applied in the coupling of a variety of substituted iodobenzenes and phenylboronic acids. The simultaneous encapsulation of metallic Pd and Cu, acting as a catalytic active site and mediator respectively, inside the cavities of NH2‐UiO‐66(Zr), represents a novel strategy for designing multifunctional metal‐organic framework based catalysts for light‐induced organic reactions.

中文翻译:

小型双金属CuPd纳米团簇包裹在NH2-UiO-66(Zr)的腔体内,具有卓越的光诱导Suzuki偶联反应性能

通过双溶剂浸渍将NH 2 ‐UiO-66(Zr)的腔内封装小尺寸≈0.9nm的双金属CuPd纳米簇,然后用NaBH 4进行还原。与单金属Pd @ NH 2 -UiO-66(Zr)相比,双金属CuPd @ NH 2 -UiO-66(Zr)在光诱导的Suzuki偶联反应中显示出优异的性能,因为引入的Cu充当电子介体,促进了光生电子从光激发的NH 2 -UiO-66(Zr)转移到Pd,形成富电子的Pd。此外,CuPd @ NH 2 -UiO-66(Zr)的活性也比CuPd / NH 2 -UiO-66(Zr)高,其中CuPd纳米颗粒沉积在NH的表面2 -UiO-66(Zr)。所获得的CuPd @ NH 2 -UiO-66(Zr)稳定,可用于各种取代的碘代苯与苯基硼酸的偶联。在NH 2 ‐UiO-66(Zr)的腔体内同时包封金属Pd和Cu,分别充当催化活性位点和介体,代表了一种设计基于多功能金属有机骨架催化剂的光诱导新策略。有机反应。
更新日期:2018-08-14
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