Chirally-Modified Graphite Oxide as Chirality Inducing Support for Asymmetric Epoxidation of Olefins with Grafted Manganese Porphyrin

Pebax/poly(vinyl alcohol) mixed matrix membrane incorporated by amine‐functionalized graphene oxide for CO2 separation

“…In contrast, the weight loss of GO‐NH 2 nanoparticles remains significantly lower (less than 20%) below 300 °C, likely due to the thermal degradation of unreacted oxygen functional groups on the GO surface. Notably, a noticeable weight loss in GO‐NH 2 (52 wt%) is observed in the temperature range from 300 °C to 600 °C, possibly caused by the degradation of amine groups attached to the GO surface 55,56 . As depicted in Figure 11, the thermal degradation of the MMMs occurs in three distinct stages.…”

“…Notably, a noticeable weight loss in GO-NH 2 (52 wt%) is observed in the temperature range from 300 C to 600 C, possibly caused by the degradation of amine groups attached to the GO surface. 55,56 As depicted in Figure 11, the thermal degradation of the MMMs occurs in three distinct stages. The first stage, spanning from ambient temperature to 300 C, can be attributed to the evaporation of residual solvents.…”

Chiral Graphene Hybrid Materials: Structures, Properties, and Chiral Applications

“…In the last type, the metal complex and chiral component are both directly connected with graphene, likewise resulting in heterogeneous chiral catalysts. [ 196 ] Based on the three primary preparation processes stated above, other metal complexes can be alike immobilized on graphene layers, for example, Cu complex [ 62,201 ] and Ti complex. [ 202 ] The resulting chiral hybrids were employed as chiral catalysts for triggering asymmetric reactions.…”

“…Graphene provides an excellent platform for creating new catalysts due to its 2D architecture and unique electrochemical properties. Among the chiral building blocks for constructing graphene based chiral material systems summarized in Section 2, proline, [ 41,43,53,58 ] enzymes, [ 145 ] and metal complexes [ 195–200,202,205–208 ] have become the most extensively used chiral species for developing chiral hybrid catalysts. To better address the issues, at this point, organocatalysis should be remarked first.…”

“…[ 58 ] Relative to proline, chiral metal complexes offer more possibilities. They can be adopted to perform a wider range of asymmetric reactions, e.g., olefin oxidation (with Mn complex), [ 195 ] olefin epoxidation (Mn complex), [ 196–200 ] sulfoxidation (Ti complex), [ 202 ] hydrogenation (Rh complex, [ 205 ] Ni complex, [ 207 ] and Pd complex [ 208 ] ), and ketone transfer hydrogenation (Ru complex). [ 206 ] The metal complex catalysts and the corresponding asymmetric reactions are summarized in Table 6.…”