A5085640753- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Zeolite Catalysis and Synthesis
- Chemical Synthesis and Characterization
- Crystal Structures and Properties
- Crystallography and molecular interactions
- Solid-state spectroscopy and crystallography
- Advanced Condensed Matter Physics
- Polyoxometalates: Synthesis and Applications
- Perovskite Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Magnetism in coordination complexes
- Mesoporous Materials and Catalysis
- Inorganic Chemistry and Materials
- Advanced NMR Techniques and Applications
- Inorganic Fluorides and Related Compounds
- Nuclear materials and radiation effects
- Catalysis and Oxidation Reactions
- Luminescence Properties of Advanced Materials
- Covalent Organic Framework Applications
- Advanced Battery Materials and Technologies
- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Thermal Expansion and Ionic Conductivity
University of California, Santa Barbara
2009-2025
National University of Singapore
2017-2025
University of California System
2019-2025
Division of Materials Research
2019-2025
University of Cambridge
2014-2023
Université de Picardie Jules Verne
2020-2021
Centre National de la Recherche Scientifique
1998-2020
Princeton University
2020
Laboratoire de Réactivité et Chimie des Solides
2020
Réseau sur le Stockage Electrochimique de l'énergie
2020
Aluminosilicate zeolites such as UTD-1 (structure shown) belong to a family of nanoporous inorganic materials that find utility in catalysis, separation, and ion exchange. During the last decade, rate discovery new open-framework based, for example, on phosphates, sulfides, halides, nitrides, coordination compounds has increased dramatically. The synthesis, structures, properties this remarkable class are reviewed.
Hybrid framework compounds, including both metal–organic coordination polymers and systems that contain extended inorganic connectivity (extended hybrids), have recently developed into an important new class of solid-state materials. We examine the diversity this complex materials, propose a simple but systematic classification, explore chemical geometrical factors influence their formation. also discuss growing evidence many hybrid frameworks tend to form under thermodynamic rather than...
The concept of tolerance factors is applied quantitatively to hybrid inorganic–organic materials that adopt perovskite-like architectures.
Multiferroic behavior in perovskite-related metal−organic frameworks of general formula [(CH3)2NH2]M(HCOO)3, where M = Mn, Fe, Co, and Ni, is reported. All four compounds exhibit paraelectric−antiferroelectric phase transition the temperature range 160−185 K (Mn: 185 K, Fe: 160 K; Co: 165 Ni: 180 K); this associated with an order−disorder involving hydrogen bonded dimethylammonium cations. On further cooling, become canted weak ferromagnets below 40 K. This research opens up a new class...
As synthesised ZIF-8 nanoparticles (size ∼ 60 nm and specific surface area 1300–1600 m2 g−1) were directly incorporated into a model polymer matrix (Matrimid® 5218) by solution mixing. This produces flexible transparent membranes with excellent dispersion of (up to loadings 30 wt%) good adhesion within the matrix, as confirmed scanning electron microscopy, dynamic mechanical thermal analysis gas sorption studies. Pure (H2, CO2, O2, N2 CH4) permeation tests showed enhanced permeability mixed...
Tolerance Factors of possible hybrid perovskites are calculated for over 2500 amine-metal-anion permutations the periodic table.
Crystalline metal-organic frameworks (MOFs) are porous comprising an infinite array of metal nodes connected by organic linkers. The number novel MOF structures reported per year is now in excess 6000, despite significant increases the complexity both component units and molecular networks. Their regularly repeating give rise to chemically variable architectures, which have been studied extensively due their sorption separation potential. More recently, catalytic applications proposed that...
The science and technology of nanomaterials has created great excitement expectations in the last few years. By its very nature, subject is immense academic interest, having to do with tiny objects nanometer regime. There already been much progress synthesis, assembly fabrication nanomaterials, and, equally importantly, potential applications these materials a wide variety technologies. next decade likely witness major strides preparation, characterization exploitation nanoparticles,...
Laser ablation MC-ICP-MS allows in situ strontium isotope data to be obtained for incrementally formed bioapatites such as enamel with extremely high spatial resolution. Here, we provide a large-scale application of the method comparing ...Understanding mobility and landscape use is important reconstructing subsistence behavior, range, group size, it may contribute our understanding phenomena dynamics biological cultural interactions between distinct ...
The big squeeze: On applying pressure to ZIF-8 (0.18 GPa), solvent can be squeezed into the porous cavities, initially increasing pore size and unit-cell volume. further 1.47 GPa, a phase transition takes place (see picture). This allows more enter original nanopores enlarges narrow channels connecting these pores, resulting in higher volume content. Detailed facts of importance specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...
[(CH3)2NH2]Zn(HCOO)3, 1, adopts a structure that is analogous to of traditional perovskite, ABX3, with A = [(CH3)2NH2], B Zn, and X HCOO. The hydrogen atoms the dimethyl ammonium cation, which bond oxygen formate framework, are disordered at room temperature. X-ray powder diffraction, dielectric constant, specific heat data show 1 undergoes an order-disorder phase transition on cooling below 156 K. We present evidence this classical paraelectric antiferroelectric driven by ordering atoms....
Freshly ground: Improved mechanochemical methodologies, such as liquid-assisted grinding and ion- enable the rapid topologically selective synthesis of porous nonporous zeolitic imidazolate frameworks with diverse topologies, at room temperature directly from zinc oxide (see scheme). Detailed facts importance to specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The...
Two-dimensional (2D) transition-metal (groups IV, V, VI) carbides (MXenes) with formulas M3C2 have been investigated as CO2 conversion catalysts well-resolved density functional theory calculations. While MXenes from the group IV to VI series demonstrated an active behavior for capture of CO2, Cr3C2 and Mo3C2 exhibit most promising CH4 selective capabilities. Our results predicted formation OCHO• HOCO• radical species in early hydrogenation steps through spontaneous reactions. This provides...
Five different cobalt succinate materials synthesized from an identical starting mixture using temperature as the only independent variable show increasing condensation and density at higher synthesis temperatures.
This paper presents a novel method and rationale for utilizing carbonized MOFs sulphur loading to fabricate cathode structures lithium–sulphur batteries. Unique carbon materials with differing hierarchical pore were synthesized from four types of zinc-containing metal–organic frameworks (MOFs). It is found that made MOFs-derived carbons higher mesopore (2–50 nm) volumes exhibit increased initial discharge capacities, whereas micropore (<2 lead better cycle stability.
We report the encapsulation of hydrophilic model molecule calcein in Zr-based MOF UiO-66, followed by amorphization framework ball-milling. show controlled release over more than 30 days, compared with 2 day period from crystalline UiO-66.
Dense inorganic-organic hybrid materials offer opportunities for creating unusual properties or combinations of properties.
Crystalline solids dominate the field of metal–organic frameworks (MOFs), with access to liquid and glass states matter usually prohibited by relatively low temperatures thermal decomposition. In this work, we give due consideration framework chemistry topology expand phenomenon melting 3D MOFs, linking crystal temperature kinetic fragility glass-forming liquids. Here show that can be lowered altering crystalline MOF state, which provides a route facilitate other MOFs. The glasses formed...