A5023664293- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Catalytic Processes in Materials Science
- Crystal structures of chemical compounds
- Crystallography and molecular interactions
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Catalysis and Oxidation Reactions
- Synthesis and biological activity
- Synthesis and Characterization of Heterocyclic Compounds
- Blood transfusion and management
- Polyoxometalates: Synthesis and Applications
- Lignin and Wood Chemistry
- Organic Light-Emitting Diodes Research
- Advanced Cellulose Research Studies
- Multicomponent Synthesis of Heterocycles
- Dendrimers and Hyperbranched Polymers
- Arsenic contamination and mitigation
- Total Knee Arthroplasty Outcomes
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Lanthanide and Transition Metal Complexes
- Radioactive element chemistry and processing
- Chemical Synthesis and Characterization
Northwestern University
2016-2019
SUNY Geneseo
2012-2017
University of Kansas
2016
UiO-66 is an archetypal zirconium-based metal–organic framework (MOF) that constructed from hexanuclear zirconium oxide clusters as secondary building units (SBUs) and 1,4-benzenedicarboxylate (bdc) linkers. For the first time, a room-temperature solution-based synthesis reported for several of its derivatives, UiO-66-X (X = NH2, OH, or NO2), resulting in materials are porous crystalline those made at elevated temperatures. In addition, via modulation temperature which synthesized, number...
Metal–organic frameworks (MOFs) are highly versatile materials that find applications in several fields. Highly stable zirconium/hafnium-based MOFs were recently introduced and nowadays represent a rapidly growing family. Their unique intriguing properties make them privileged outstanding candidates heterogeneous catalysis, finding use either as catalysts or catalyst supports. Various techniques have been developed to incorporate active species into Zr-MOFs, giving rise often demonstrate...
Zr-based metal–organic frameworks (MOFs) have been shown to be excellent catalyst supports in heterogeneous catalysis due their exceptional stability. Additionally, crystalline nature affords the opportunity for molecular level characterization of both support and catalytically active site, facilitating mechanistic investigations catalytic process. We describe herein installation Co(II) ions Zr6 nodes mesoporous MOF, NU-1000, via two distinct routes, namely, solvothermal deposition a MOF...
Select ionic liquids (ILs) dissolve significant quantities of cellulose through disruption and solvation inter- intramolecular hydrogen bonds. In this study, thermodynamic solid-liquid equilibrium was measured with microcrystalline in a model IL, 1-ethyl-3-methylimidazolium diethyl phosphate ([EMIm][DEP]) mixtures protic antisolvents aprotic cosolvents between 40 120 °C. The solubility pure [EMIm][DEP] exhibits an asymptotic maximum approximately 20 mass % above 100 Solubility studies...
Few-atom cobalt-oxide clusters, when dispersed on a Zr-based metal-organic framework (MOF) NU-1000, have been shown to be active for the oxidative dehydrogenation (ODH) of propane at low temperatures (<230 °C), affording selective and stable propene production catalyst. In our current work, series promoter ions with varying Lewis acidity, including Ni(II), Zn(II), Al(III), Ti(IV) Mo(VI), are anchored as metal-oxide,hydroxide clusters NU-1000 followed by Co(II) ion deposition, yielding...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRoom Temperature Synthesis of an 8-Connected Zr-Based Metal–Organic Framework for Top-Down Nanoparticle EncapsulationHyunho NohHyunho NohDepartment Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United StatesMore by Hyunho Nohhttp://orcid.org/0000-0003-3136-1004, Chung-Wei KungChung-Wei KungDepartment Kunghttp://orcid.org/0000-0002-5739-1503, Timur IslamogluTimur IslamogluDepartment...
For the first time, an increasing number of defects were introduced to metal-organic framework UiO-66-NH2 in attempt understand structure-activity trade-offs associated with toxic chemical removal. It was found that optimum exists moderate for chemicals react linker, whereas those require hydrolysis at secondary building unit performed better when more introduced. The insights obtained through this work highlight ability dial-in appropriate material formulations, even within same parent...
Direct control over structure and location of catalytic species deposited on amorphous supports represents a formidable challenge in heterogeneous catalysis. In contrast, structurally well-defined, crystalline metal-organic framework (MOF) can be rationally designed using postsynthetic techniques to allow for desired structural or locational changes metal ions. Herein, naphthalene dicarboxylate linkers are incorporated the MOF, NU-1000, block small cavities where few-atom clusters cobalt...
We describe a method for synthesizing nitrate reduction catalyst within metal–organic framework (MOF). The MOF NU-1000, zirconium-based mesoporous material, is exposed by using atomic layer deposition (ALD) to vaporous iron amidinate coordination complex and subsequently dodecanethiol ligand synthesize an thiolate cluster grafted on the zirconium oxide nodes. Structural identification of conducted through X-ray absorption spectroscopy (XAS) differential envelope density (DED) analyses. Once...
NU-1000, a mesoporous metal–organic framework (MOF) featuring hexazirconium oxide nodes and 3 nm wide channels, was infiltrated with reactive dicobalt complex to install active sites onto the MOF nodes. The anchoring of NU-1000 occurred nearly ideal stoichiometry one bimetallic per node cobalt evenly distributed throughout particle. To access thermally robust multimetallic on an all-inorganic support, modified materials containing either complex, or analogous cobalt–aluminum species, were...
Luminescent metal complexes are used in photooptical devices. Zinc(II) of interest because the ability to tune their color, high thermal stability and favorable carrier transport character. In particular, some zinc(II) with aryl diimine and/or heterocyclic ligands have been shown emit brightly blue region spectrum. bearing derivatized imidazoles explored for possible optoelectronic applications. The structures two 5,6-dimethyl-2-(pyridin-2-yl)-1-[(pyridin-2-yl)methyl]-1H-benzimidazole (L),...
The title compound, C20H18N4, was obtained via the condensation of 4,5-di-methyl-benzene-1,2-di-amine with pyridine-2-carbaldehyde. plane 2-(pyridin-2-yl) substitutent is canted by 2.75 (11)° from benzimidazole system. mol-ecule exhibits an S(6) C-H⋯N intra-molecular hydrogen-bond motif. In crystal, hydrogen bonds link pairs mol-ecules related a crystallographic inversion center, forming R 2 (2)(20) rings. Additional weak result in C(9) chains parallel to [001].
The structural characterization of several polymorphic forms a compound allow the interplay between molecular conformation and intermolecular interactions to be studied, which can contribute development strategies for rational preparation materials with desirable properties tailoring produce solids predictable characteristics interest in crystal engineering. structures two new polymorphs 5,6-dimethyl-2-(pyridin-2-yl)-1-[(pyridin-2-yl)methyl]-1 H -benzimidazole, C 20 18 N 4 , are reported....
There are two independent mol-ecules in the asymmetric unit of title compound, C(16)H(11)BrN(2)S(2). In crystal, weak C-H⋯N hydrogen bonds and C-H⋯thio-phene ring inter-actions link into chains along [100]. The structure exhibits disorder 2-thio-phen-2-yl substituent one symmetry-unique with a major:minor component ratio 0.914 (3):0.086 (3).
Copper(II) complexes of benzimidazole are known to exhibit biological activity that makes them interest for chemotherapeutic and other pharmaceutical uses. The complex bis(acetato-κ O ){5,6-dimethyl-2-(pyridin-2-yl)-1-[(pyridin-2-yl)methyl]-1 H -benzimidazole-κ 2 N , 3 }copper(II), has been prepared. absorption spectrum features attributed intraligand ligand-field transitions the exhibits ligand-centered room-temperature luminescence in solution. acetonitrile monosolvate, [Cu(C ) (C 20 18 4...
The photophysical properties of transition metal complexes the 5,6-dimethyl-2-(pyridin-2-yl)-1-(pyridin-2-ylmethyl)-1 H -benzimidazole ligand are interest. Dichlorido[5,6-dimethyl-2-(pyridin-2-yl)-1-(pyridin-2-ylmethyl)-1 -benzimidazole-κ 2 N , 3 ]platinum(II), [PtCl (C 20 18 4 )], is luminescent in solid state at room temperature. compound displays a distorted square-planar coordination geometry. Pt—N(imidazole) bond length shorter than Pt—N(pyridine) length. extended structure reveals that...