Highly modulated supported triazolium-based ionic liquids: direct control of the electronic environment on Cu nanoparticles

Abstract

A series of new triazolium-based supported ionic liquids (SILPs), decorated with Cu NPs, were successfully prepared and applied to the N-arylation of aryl halides with anilines.

Use of an optofluidic microreactor and Cu nanoparticles synthesized in ionic liquid and embedded in TiO2 for an efficient photoreduction of CO2 to methanol

“…showing an increase of CuO with the increase of Cu content in the composite, which is evidenced by the strong satellite peak observed for 6.8% Cu/TiO2 photocatalyst that is associated with CuO, in agreement with PXRD results (Table S1 in SI). These results indicate that Cu(II) valence state is preferentially stabilised for higher Cu contents in the TiO2 matrix, which might be due to the presence of IL in the synthesis of the Cu NPs [28].…”

“…This effect can be also associated with a decrease in the Cu2O/CuO ratio with increases in Cu content (as observed from PXRD and XPS), since CuO is usually more selective to CH4 and CO formation [50]. This change in Cu2O/CuO can be linked to the use of (BMIm.BF4) IL in the synthesis of the Cu NPs [28].…”

Triazolium‐based Ionic Liquids Supported on Alumina as Catalysts to Produce 5‐HMF from Fructose

“…A new kind of ionic liquids based on triazolium rings has been developed since triazoles can be easily synthesized by Huisgen 1,3‐dipolar cycloaddition, [12] and are an alternative to imidazolium‐rings for the development of new generations of supported ionic liquids [13] . The copper‐catalyzed azide‐alkyne cycloaddition (CuAAC) is considered a click‐chemistry reaction [13–14] because it shows certain characteristics related to green chemistry, such as high yielding at room temperature (RT) and benign reaction media. Additionally, the triazoles moieties offer advantages such as three tunable groups, a less reactive proton in carbon 5, and an H‐bonding acceptor [13] .…”

“…The copper‐catalyzed azide‐alkyne cycloaddition (CuAAC) is considered a click‐chemistry reaction [13–14] because it shows certain characteristics related to green chemistry, such as high yielding at room temperature (RT) and benign reaction media. Additionally, the triazoles moieties offer advantages such as three tunable groups, a less reactive proton in carbon 5, and an H‐bonding acceptor [13] . Regarding tunability, the ‐SO 3 H groups have also proved to be suitable substitutes for fructose dehydration [15] .…”

“…In Figure S7 and Table S2, the I‐Al 2 O 3 shows peaks between δ14–35 ppm related to the alkyl chains. Valdebenito et al [13] . described that the disappearance of methoxy leaving group signals in 13 C NMR from silane function is a way of confirming that methoxy silane groups have effectively reacted with the hydroxyl groups of alumina support.…”