A5023005792- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Multicomponent Synthesis of Heterocycles
- Catalytic Alkyne Reactions
- Crystallography and molecular interactions
- Sulfur-Based Synthesis Techniques
- Carbon dioxide utilization in catalysis
- Radical Photochemical Reactions
- Synthesis and Catalytic Reactions
- Computational Drug Discovery Methods
- Chemical Synthesis and Analysis
- Covalent Organic Framework Applications
- Asymmetric Hydrogenation and Catalysis
- Organic Light-Emitting Diodes Research
- Pickering emulsions and particle stabilization
- Synthetic Organic Chemistry Methods
- Synthesis and Characterization of Pyrroles
- Catalytic C–H Functionalization Methods
- Electrohydrodynamics and Fluid Dynamics
- Advanced MRI Techniques and Applications
- Asymmetric Synthesis and Catalysis
- NMR spectroscopy and applications
- Conducting polymers and applications
- Surfactants and Colloidal Systems
Dow Chemical (United States)
2024
University of Minnesota
2019-2020
The Ohio State University
2018
State Street (United States)
2018
Brandeis University
2016-2018
A Zn benzotriazolate metal–organic framework (MOF), [Zn(ZnO2CCH3)4(bibta)3] (1, bibta2– = 5,5′-bibenzotriazolate), has been subjected to a mild CH3CO2–/HCO3– ligand exchange procedure followed by thermal activation generate nucleophilic Zn–OH groups that resemble the active site of α-carbonic anhydrase. The postsynthetically modified MOF, [Zn(ZnOH)4(bibta)3] (2*), exhibits excellent performance for trace CO2 capture and can be regenerated at temperatures. IR spectroscopic data density...
Pyrazoles are an important class of heterocycles found in a wide range bioactive compounds and pharmaceuticals. Pyrazole synthesis often requires hydrazine or related reagents where intact N–N bond is conservatively installed into pyrazole precursor fragment. Herein, we report the multicomponent oxidative coupling alkynes, nitriles, Ti imido complexes for multisubstituted pyrazoles. This modular method avoids potentially hazardous like hydrazine, instead forming final step via...
Carboxylic acid-functionalized Pd and Pt PNNNP pincer complexes were used for the assembly of two porous Zr metal-organic frameworks (MOFs), 2-PdX 2-PtX. Powder X-ray diffraction analysis shows that new MOFs adopt cubic framework structures similar to previously reported Zr6O4(OH)4[(POCOP)PdX]3, [POCOP = 2,6-(OPAr2)2C6H3); Ar p-C6H4CO2-, X Cl-, I-] (1-PdX). Elemental spectroscopic characterization indicate presence missing linker defects, 2-PtX formulated as Zr6O4(OH)4(OAc)2.4[M(PNNNP)X]2.4...
The rational design of catalysts remains a challenging endeavor within the broader chemical community owing to myriad variables that can affect key bond-forming events. Designing selective for any reaction requires an efficient strategy discovering predictive structure–activity relationships. Herein, we describe use iterative supervised principal component analysis (ISPCA) in de novo catalyst design. regioselective synthesis 2,5-dimethyl-1,3,4-triphenyl-1H-pyrrole (C) via Ti-catalyzed formal...
The dinuclear gold(II,II) and gold(III,III) complexes [Au2(μ-PY)2(MeCN)2]OTf2 (2-OTf2) [Au2(μ-PY)2(μ-CH2)(MeCN)2]OTf2 (3-OTf2) (PY = [(CH2)2PPh2]−) have been synthesized evaluated as Lewis acid catalysts for Mukaiyama addition alkyne hydroamination reactions. 2-OTf2 3-OTf2 provide similar or improved catalytic activity these reactions compared to the commonly used gold(I) acids Ph3PAuOTf IPrAuOTf. versatile acidity of was further demonstrated by its superior performance in a cascade reaction...
NOBF<sub>4</sub> enables efficient oxidative ligand exchange in a Pd pincer MOF, generating highly active and recyclable Lewis acid catalyst.
Despite the ubiquity of reports describing titanium (Ti)-catalyzed [2 + 2 2] cyclotrimerization alkynes, incorporation arynes into this potent manifold has never been reported. The in situ generation often requires fluoride, which instead will react with highly fluorophilic Ti center, suppressing productive catalysis. Herein, we describe use group 4 diarylmetallocenes, CpR2MAr2 (CpR = C5H5, C5Me5; M Ti, Zr), as aryne precursors for Ti-catalyzed synthesis substituted naphthalenes via coupling...
The effects of Li+ and Mg2+ on the electrochemical behaviour photoreduction N,N'-bis(2,6-diisopropylphenyl)naphthalene diimide (Dipp2NDI) have been investigated using cyclic voltammetry UV-vis spectroscopy. Strong cation-anion interactions between or [Dipp2NDI]2- result in solvent-dependent anodic shifts NDI˙-/2- redox couple. In organic solvents moderate dielectric constant donor ability, two, one-electron processes typically observed for Dipp2NDI merge into a single, two-electron process....
Silicone-in-water emulsions have found widespread use as lubricants, water repellants, softeners, binders, antiblocking agents, antislip and defoamers across a diverse range of markets including textiles, coatings, pharmaceuticals, home personal care. Stable incorporation silicone into formulated products for these applications can be challenge. This study seeks to enable formulation by investigating the impact degree ethoxylation sodium lauryl ether sulfate (SLES) surfactants on their...
Abstract 13 C nuclear magnetic resonance (NMR) is traditionally considered an insensitive technique, requiring long acquisition times to measure dilute functionalities on large polymers. With the introduction of cryoprobes and better electronics, sensitivity has improved in a way that allows measurements take less than 1/20th time they previously did. Unfortunately, high Q‐factor with creates baseline curvature related acoustic ringing affects quantitative NMR analyses. Manual correction...
Herein, we describe the use of iterative supervised principal component analysis (ISPCA) in de novo catalyst design. The regioselective synthesis 2,5-dimethyl-1,3,4-triphenyl-1H- pyrrole (C) via Ti- catalyzed formal [2+2+1] cycloaddition phenyl propyne and azobenzene was targeted as a proof principle. initial reaction conditions led to an unselective mixture all possible regioisomers. ISPCA conducted on training set catalysts, their performance regressed against scores from top three...