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Design, Synthesis and Characterization of Nickel‐Functionalized Covalent Organic Framework NiCl@RIO‐12 for Heterogeneous Suzuki–Miyaura Catalysis
Author(s) -
Maia Renata A.,
Berg Fabienne,
Ritleng Vincent,
Louis Benoît,
Esteves Pierre M.
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201904845
Subject(s) - nickel , catalysis , crystallinity , thermal stability , covalent bond , materials science , chemical engineering , dispersion (optics) , nuclear chemistry , inorganic chemistry , chemistry , polymer chemistry , organic chemistry , metallurgy , composite material , physics , optics , engineering
A series of nickel‐decorated covalent organic frameworks, NiCl@RIO‐12, were prepared using the post‐synthetic modification strategy, that is, by reacting NiCl 2 with pristine RIO‐12 under alkaline conditions. Interestingly, they retained their crystallinity and the amount of nickel incorporated could be tuned from 3.6 to 25 wt % according to the reaction conditions. The incorporation of a higher amount of nickel in NiCl@RIO‐12 consistently led to a lower Brunauer–Emmett–Teller surface area. Additionally, no agglomeration of nickel particles was found and a relatively homogeneous dispersion of nickel could be ascertained by SEM and TEM‐EDS. The paramagnetic material exhibited promising catalytic activity in Suzuki–Miyaura cross‐coupling under microwave heating. Thus, NiCl@RIO‐12 notably demonstrated good thermal stability and its recyclability showed no substantial loss of activity after 3 cycles.