A5028972772- Metal-Organic Frameworks: Synthesis and Applications
- 2D Materials and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Topological Materials and Phenomena
- Advanced Condensed Matter Physics
- Iron-based superconductors research
- Crystallography and molecular interactions
- Electronic and Structural Properties of Oxides
- MXene and MAX Phase Materials
- Graphene research and applications
- Theoretical and Computational Physics
- Multiferroics and related materials
- Magnetic properties of thin films
- Rare-earth and actinide compounds
- Mechanical and Optical Resonators
- Physics of Superconductivity and Magnetism
- Heusler alloys: electronic and magnetic properties
- Random lasers and scattering media
- Catalytic Processes in Materials Science
- Machine Learning in Materials Science
- Acoustic Wave Resonator Technologies
- Advanced Combinatorial Mathematics
Columbia University
2022-2025
University of California, Berkeley
2018-2021
Lawrence Berkeley National Laboratory
2019-2020
University of California System
2020
Berkeley College
2020
The modular nature of metal–organic frameworks (MOFs) leads to a very large number possible structures. High-throughput computational screening has led rapid increase in property data that enabled several potential applications for MOFs, including gas storage, separations, catalysis, and other fields. Despite their rich chemistry, MOFs are typically named using an ad hoc approach, which can impede searchability the discovery broad insights. In this article, we develop two systematic MOF...
Lithium-ion batteries have remained a state-of-the-art electrochemical energy storage technology for decades now, but their densities are limited by electrode materials and conventional liquid electrolytes can pose significant safety concerns. Lithium metal featuring Li anodes, solid polymer electrolytes, high-voltage cathodes represent promising candidates next-generation devices exhibiting improved power safety, such generally do not exhibit the required excellent properties thermal...
The discovery of magnetic order at the 2D limit has sparked new exploration van der Waals magnets for potential use in spintronics, magnonics, and quantum information applications. However, many these materials feature low ordering temperatures poor air stability, limiting their fabrication into practical devices. In this Mini-Review, we present a promising material fundamental studies functional use: CrSBr, an air-stable, two-dimensional semiconductor. Our discussion highlights experimental...
The isostructural, two-dimensional metal–organic frameworks (H2NMe2)2M2(Cl2dhbq)3 (M = Ti, V; Cl2dhbqn– deprotonated 2,5-dichloro-3,6-dihydroxybenzoquinone) and (H2NMe2)1.5Cr2(dhbq)3 (dhbqn– 2,5-dihydroxybenzoquinone) are synthesized investigated by spectroscopic, magnetic, electrochemical methods. three exhibit substantial differences in their electronic structures, the bulk conductivities of these phases correlate with extent delocalization observed via UV–vis–NIR IR spectroscopies....
Two iron–semiquinoid framework materials, (H2NMe2)2Fe2(Cl2 dhbq)3 (1) and (H2NMe2)4Fe3(Cl2 dhbq)3(SO4)2 (Cl2 dhbqn– = deprotonated 2,5-dichloro-3,6-dihydroxybenzoquinone) (2-SO4), are shown to possess electrochemical capacities of up 195 mAh/g. Employing a variety spectroscopic methods, we demonstrate that these exceptional arise from combination metal- ligand-centered redox processes, result supported by electronic structure calculations. Importantly, similar not observed in isostructural...
Abstract CrSBr is an air‐stable two‐dimensional (2D) van der Waals semiconducting magnet with great technological promise, but its atomic‐scale magnetic interactions—crucial information for high‐frequency switching—are poorly understood. An experimental study presented to determine the exchange Hamiltonian and bulk magnon spectrum. The A ‐type antiferromagnetic order using single crystal neutron diffraction confirmed here. dispersions are also measured inelastic scattering rigorously fit...
Abstract Since their first observation in 2017, atomically thin van der Waals (vdW) magnets have attracted significant fundamental, and application-driven attention. However, low ordering temperatures, T c , sensitivity to atmospheric conditions difficulties preparing clean large-area samples still present major limitations further progress, especially amongst magnetic semiconductors. The remarkably stable, high- vdW magnet CrSBr has the potential overcome these key shortcomings, but its...
Abstract Magnetic van der Waals (vdW) materials are a promising platform for producing atomically thin spintronic and optoelectronic devices. The A‐type antiferromagnet CrSBr has emerged as particularly exciting material due to its high magnetic ordering temperature, semiconducting electrical properties, enhanced chemical stability compared other vdW magnets. Exploring mechanisms tune properties will facilitate the development of nanoscale devices based on with designer properties. Here it...
Recent research has revealed remarkable properties of the two-dimensional (2D) van der Waals layered crystal CrSBr, which is both a semiconductor and an $A$-type antiferromagnet. Here we show role strong magnetoelastic coupling in generation propagation coherent magnons CrSBr. Time- spatially resolved magneto-optical Kerr effect microscopy reveals two time-varying transient strain fields induced by out-of-plane transverse in-plane longitudinal lattice displacements. These launch wavepackets...
Developing O2-selective adsorbents that can produce high-purity oxygen from air remains a significant challenge. Here, we show chemically reduced metal–organic framework materials of the type AxFe2(bdp)3 (A = Na+, K+; bdp2– 1,4-benzenedipyrazolate; 0 < x ≤ 2), which feature coordinatively saturated iron centers, are capable strong and selective adsorption O2 over N2 at ambient (25 °C) or even elevated (200 temperature. A combination gas analysis, single-crystal X-ray diffraction, magnetic...
The application of metal–organic frameworks (MOFs) as electrocatalysts for small molecule activation has been an emerging topic research. Previous studies have suggested that two-dimensional (2D) dithiolene-based MOFs are among the most active hydrogen evolution reaction (HER). Here, a three-dimensional (3D) MOF, Cu[Ni(2,3-pyrazinedithiolate)2] (1), is evaluated electrocatalyst HER. In pH 1.3 aqueous electrolyte solution, 1 exhibits catalytic onset at −0.43 V vs reversible electrode (RHE),...
Abstract In materials with 1D electronic bands, electron–electron interactions can produce intriguing quantum phenomena, including spin‐charge separation and charge density waves (CDW). Most of these systems, however, are non‐magnetic, motivating a search for anisotropic where the coupling spin may affect emergent states. Here, chemical intercalation van der Waals magnetic semiconductor CrSBr yields Li 0.17(2) (tetrahydrofuran) 0.26(3) CrSBr, which possesses an electronically driven quasi‐1D...
The recent discovery of the van der Waals (vdW) layered heavy fermion antiferromagnetic metal CeSiI offers promising potential for achieving accessible quantum criticality in two-dimensional (2D) limit. exhibits both behavior and (AFM) ordering, while exact magnetic structure phase diagram are yet to be determined. Here, we investigate properties atomically thin devices with thicknesses ranging from 2 15 vdW layers. thickness-dependent magnetotransport measurement reveals intrinsic 2D nature...
The discovery of conductive and magnetic two-dimensional (2D) materials is critical for the development next generation spintronics devices. Coordination chemistry in particular represents a highly versatile, though underutilized, route toward synthesis such with designer lattices. Here, we report conductive, layered 2D metal–organic kagome lattice, Mn3(C6S6), using mild solution-phase chemistry. Strong geometric spin frustration this system mediates freezing at low temperatures, which...
Metal–organic frameworks with amidic linkers often exhibit exceptional physical properties, but, owing to their strong metal–nitrogen bonds, are exceedingly challenging isolate through direct synthesis. Here, we report a route access metal–diamidobenzoquinone from dihydroxobenzoquinone counterparts via postsynthetic linker exchange. The parent compounds (Me2NH2)2[M2L3] (M = Zn, Mn; H2L 2,5-dichloro-3,6-dihydroxo-1,4-benzoquinone) undergo exchange upon exposure solution of monodeprotonated...
Incorporation of Nb and Mo into conductive metal–organic frameworks enables utilization the enhanced covalency, redox activity, spin–orbit coupling late-row metals to improve transport magnetic properties these materials.
Layered metal–organic frameworks are promising candidates for new two-dimensional (2D) magnets, as the synthetic programmability of these materials can provide a route to diverse structural and electronic properties. However, such framework typically lack heavy elements that engender magnetocrystalline anisotropy in monolayer ferromagnets reported date. Alternative sources magnetic therefore needed materials. Here, we report synthesis single crystals material (NMe4)2[Fe2L3] (H2L =...
Single-crystal X-ray diffraction reveals structural influences on gas adsorption properties in anionic metal–organic frameworks.