Phosphine‐Based Covalent Organic Framework for the Controlled Synthesis of Broad‐Scope Ultrafine Nanoparticles

In this work, a phosphine‐based covalent organic framework (Phos‐COF‐1) is successfully synthesized and employed as a template for the confined growth of broad‐scope nanoparticles (NPs). Ascribed to the ordered distribution of phosphine coordination sites in the well‐defined pores, various stable an...

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Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2020-02, Vol.16 (8), p.e1906005-n/a
Main Authors: Tao, Rao, Shen, Xiran, Hu, Yiming, Kang, Kun, Zheng, Yaqian, Luo, Shichang, Yang, Shiyu, Li, Wenliang, Lu, Shuanglong, Jin, Yinghua, Qiu, Li, Zhang, Wei
Format: Article
Language:English
Subjects:
Bimetals
catalysis
controlled synthesis
Coupling
covalent organic frameworks
Dispersion
Gold
Inductively coupled plasma
metal nanoparticles
Nanoparticles
Nanotechnology
Palladium
phosphine
Phosphines
Photoelectrons
Platinum
Recyclability
Reduction
Ultrafines
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Summary:In this work, a phosphine‐based covalent organic framework (Phos‐COF‐1) is successfully synthesized and employed as a template for the confined growth of broad‐scope nanoparticles (NPs). Ascribed to the ordered distribution of phosphine coordination sites in the well‐defined pores, various stable and well‐dispersed ultrafine metal NPs including Pd, Pt, Au, and bimetallic PdAuNPs with narrow size distributions are successfully prepared as determined by transmission electron microscopy, X‐ray photoelectron spectroscopy, inductively coupled plasma, and powder X‐ray diffraction analyses. It is also demonstrated that the as‐prepared Phos‐COF‐1‐supported ultrafine NPs exhibit excellent catalytic activities and recyclability toward the Suzuki–Miyaura coupling reaction, reduction of nitro‐phenol and 1‐bromo‐4‐nitrobenzene, and even tandem coupling and reduction of p‐nitroiodobenzene. This work will open many new possibilities for preparing COF‐supported ultrafine NPs with good dispersity and stability for a broad range of applications. A phosphine‐based covalent organic framework (COF) is constructed and used as a scaffold for size‐controlled synthesis of stable and highly dispersed unltrafine mono‐ and bimetallic nanoparticles. The obtained Phos‐COF‐supported Pd, Pt, Au, and Pd/Au nanoparticles exhibit excellent catalytic activities toward the cross‐coupling, reduction, and tandem one‐pot cross‐coupling and reduction reactions.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201906005