期刊
MOLECULES
卷 26, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/molecules26226864
关键词
calixarene; CuAAC; polyNHC; Pd nanoclusters
资金
- Russian Science Foundation [19-13-00095]
- Russian Science Foundation [19-13-00095] Funding Source: Russian Science Foundation
In this study, a new polymeric NHC carrier was synthesized and its structure was confirmed through copper-catalyzed click polymerization. Pd nanoclusters supported on the polymeric surface exhibited high catalytic activity in the model reduction of p-nitrophenol, with the ability to be recycled for multiple cycles.
A new polymeric NHC carrier was synthesized by sequential supramolecular self-assembly and copper-catalyzed azide-alkyne cycloaddition (CuAAC) of amphiphilic imidazolium calix[4]arenes with octyl lipophilic fragments. Obtained polytriazole-imidazolium particles were found as monodisperse submicron particles, with the average diameter of 236 +/- 34 nm and average molecular weight of 1380 +/- 96 kDa. Successful CuAAC polymerization has been proved using IR spectroscopy and high-resolution ESI mass spectrometry. Polymeric particles, as well as aggregates made from precursor macrocycles, were decorated by Pd clusters (2 nm) for further catalytic investigations. Pd nanoclusters, supported on the polymeric surface, were found highly catalytically active in the model reduction of p-nitrophenol, giving reaction rates an order of magnitude higher compared to literature examples. The reaction was recycled using the same catalyst five times without any loss of activity.
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