CO₂-triggered reversible phase transfer of graphene quantum dots for visible light-promoted amine oxidation

Abstract

Graphene quantum dots with switchable phase transfer for photocatalytic imine synthesis under visible light.

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

“…[10,11]. Among many semiconductor QDs, graphene quantum dots (GQDs) are monolayer or multilayer graphene nanosheets with a transverse size of less than 100 nm [12]; due to its distinctive electronic and optical properties, it has become a research hotspot as photocatalytic nanomaterials [13]. Because of the existence of quantum confinement effect, zero dimensional GQDs have discrete electron energy levels, which is different from nanosheets and nanoribbons [14,15].…”

Organometallic Magnesium Complex with Aggregation Induced Emission Properties: Synthesis, Characterization, and Fluorescent Fibers Applications

“…As shown in Figure 1a of 1 H NMR spectra, aromatic ring showed peaks at 7.41, 7.43, 7.97 and 7.99 ppm. [30] The peak located at 6.65 ppm originated from C=CÀ H. The 13 C-NMR spectrum (Figure 1b) showed four peaks at 127.45, 128.54, 130.61 and 141.81 ppm, ascribed to CÀ C, CÀ H, C=C bonds of aromatic rings. [30] The peaks of À COÀ and ChemPhysChem CÀ H bonds were located at 183.69 ppm and 92.3 ppm, [31] which identified the chemical structure of the final products.…”

Visible Light-Induced Aerobic Oxidative Dehydrogenation of C–N/C–O to C=N/C=O Bonds Using Metal-Free Photocatalysts: Recent Developments

“…Metal-free graphene quantum dots (GQDs) and carbon quantum dots (CQDs) are interesting materials due to their unique physical and chemical properties, demonstrated to have various photocatalytic applications [141,142]. Thus, the aerobic oxidative coupling of benzylamines for the preparation of 2 has been successfully carried out with nitrogen-and sulfur-codoped GQDs synthesized from a catecholamine derivative (NS-GQDs, 63) [143], oxygen-rich CQDs (O-CQDs, 64) [144] and dimethylamino-functionalized GQDs (GQD-DMA, 65) [145] (Figure 17). Recycling experiments were performed by precipitation (for 63), vacuum distillation of the reactants, products and solvents (for 64), and by CO 2 bubbling for 10 min (for 65), without observing significant changes in the results.…”

“…Molecules 2022, 27, x FOR PEER REVIEW 23 of 50 [145] (Figure 17). Recycling experiments were performed by precipitation (for 63), vacuum distillation of the reactants, products and solvents (for 64), and by CO2 bubbling for 10 min (for 65), without observing significant changes in the results.…”