The substitution of catalytic metals by -block main elements has a tremendous impact not only in the fundamentals but also in the economic and ecological fingerprint of organic reactions. Here we show that few-layer black phosphorous (FL-BP), a recently discovered and now readily available 2D material, catalyzes different radical additions to alkenes with an initial turnover frequency (TOF) up to two orders of magnitude higher than representative state-of-the-art metal complex catalysts at room temperature. The corresponding electron-rich BP intercalation compound (BPIC) KP shows a nearly twice TOF increase with respect to FL-BP. This increase in catalytic activity respect to the neutral counterpart also occurs in other 2D materials (graphene vs. KC) and metal complex catalysts (Fe vs. Fe carbon monoxide complexes). This reactive parallelism opens the door for cross-fertilization between 2D materials and metal catalysts in organic synthesis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7216949 | PMC |
| http://dx.doi.org/10.1002/cctc.201902276 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Optical tuning of the terahertz response of black phosphorus quantum dots: effects of weak carrier confinement.
Nanophotonics
December 2023
School of Physics and Astronomy, Yunnan University, Kunming 650091, P.R. China.
In contrast to few-layer black phosphorus (BP) with a relatively larger area, BP quantum dots (BP-QDs) are expected to have distinctive electromagnetic response and carrier behaviors, especially in low-frequency range such as in the THz regime. Herein, we experimentally investigate the THz properties of BP-QDs as well as the optical control of these properties. It is demonstrated that the effects of weak carrier confinement, which is associated with diffusive restoring current in each BP-QD, contribute significantly to the effective THz conductivity of BP-QDs.
View Article and Find Full Text PDFTopological Fermiology of gate-tunable Rashba electron gases.
Sci Adv
November 2024
School of Physics and State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, P. R. China.
By introducing first-order quantum phases as topological invariants, recent symmetry analysis-based theories have reinvigorated magnetic quantum oscillations as a versatile quantum probe for unfolding the Fermi surface topology along with the geometry information, i.e., topo-Fermiology.
View Article and Find Full Text PDFVibrational Fermi Resonance in Atomically Thin Black Phosphorus.
Nano Lett
October 2024
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Article Synopsis
- Fermi resonance is a phenomenon where two similar vibrational or electronic states mix, and this study explores this in atomically thin black phosphorus, a material that hasn't been thoroughly investigated in this context.
- The study reveals that the Fermi resonance occurs through the mixing of a fundamental Raman mode and a related infrared mode, resulting in a characteristic doublet that changes with applied strain.
- The findings provide new insights into how electrons interact with vibrations (or phonons) in black phosphorus and suggest a new way to control Fermi resonances in two-dimensional semiconductor materials.
An updated review of few-layer black phosphorus serving as a promising photocatalyst: synthesis, modification and applications.
Nanoscale
October 2024
School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China.
Article Synopsis
- Semiconductor photocatalysts like black phosphorus (BP) offer a dual solution to global energy and environmental issues, thanks to their unique properties such as high hole mobility and light trapping abilities.
- However, pure black phosphorus has limitations, including poor photocatalytic performance, instability, and challenges in controlling its thickness.
- The review outlines various synthesis and modification techniques for few-layer black phosphorus (FL-BP) and its applications in areas like water splitting, pollutant degradation, and bacterial disinfection, while also addressing the challenges and future prospects for FL-BP photocatalysts.
Ultrathin natural biotite crystals as a dielectric layer for van der Waals heterostructure applications.
Nanotechnology
October 2024
Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-100 Campinas, SP, Brazil.
Biotite, an iron-rich mineral belonging to the trioctahedral mica group, is a naturally abundant layered material (LM) exhibiting attractive electronic properties for application in nanodevices. Biotite stands out as a non-degradable LM under ambient conditions, featuring high-quality basal cleavage-a significant advantage for van der Waals heterostructure (vdWH) applications. In this work, we present the micro-mechanical exfoliation of biotite down to monolayers (1Ls), yielding ultrathin flakes with large areas and atomically flat surfaces.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!