Copper Nanoparticles on Controlled Pore Glass and TEMPO for the Aerobic Oxidation of Alcohols

Abstract

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Aerobic oxidation of alcohols enabled by nitrogen-doped copper nanoparticle catalysts

“…[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Metal nanoparticles (NPs) can form heterogeneous catalysts with promising potential because they tend to have good robustness and can be easily immobilized. Although several groups have reported heterogeneous Cu NP catalysts for the aerobic oxidation of alcohols with TEMPO, [26][27][28][29] harsh reaction conditions are generally necessary. More importantly, aliphatic alcohols are rarely applied in these reports.…”

Copper nanoparticles on controlled pore glass (CPG) as highly efficient heterogeneous catalysts for “click reactions”

“…The Cu nanocatalyst was characterized by a number of analytic techniques, including transmission emission microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and elemental analysis by inductively coupled plasma optical emission spectrometry (ICP-QES) 24 . The TEM analysis, performed here revealed the Cu-Amp-CPG nanocatalyst (Fig.…”

“…Among the different supports that can be prepared with tunable morphology and specific surface functionalization, controlled pore glass (CPG), which belongs to the family of silica-based materials, remains a relatively underdeveloped support within the nanocatalysis field [23][24][25][26][27] . It has several advantages over supports, which have been used for immobilization of metal nanoparticles: cost-effective synthesis, being commercial available with different types of surface functionalities, efficient mass-transfer, high surface area, tunable morphology, producibility in many different shapes , high mechanical, thermal and chemical stability.…”

“…Hence, there is a need for further developments of CPG as a support within the nanocatalyst research area. In this context, we have previously assembled heterogeneous palladium nanocatalysts (PdNP) 23,25 and copper nanocatalysts (CuNP) 24 on controlled pore glass (CPG), which demonstrated notable levels of performance in catalysis. For example, in our previous work on the development of a CuNP-CPG nanocatalyst we fabricated an efficient catalyst for the aerobic oxidation of alcohols to their corresponding carbonyl compounds 24 .…”

“…In this context, we have previously assembled heterogeneous palladium nanocatalysts (PdNP) 23,25 and copper nanocatalysts (CuNP) 24 on controlled pore glass (CPG), which demonstrated notable levels of performance in catalysis. For example, in our previous work on the development of a CuNP-CPG nanocatalyst we fabricated an efficient catalyst for the aerobic oxidation of alcohols to their corresponding carbonyl compounds 24 . In comparison to other supported CuNP nanocatalysts used for the CuAAC reaction, the use of CPG as the support would allow for all of the above mentioned advantages (e.g.…”