A5001291968- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Catalysis for Biomass Conversion
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Crystallography and molecular interactions
- Advanced Chemical Physics Studies
- Catalysis and Hydrodesulfurization Studies
- Asymmetric Hydrogenation and Catalysis
- Turfgrass Adaptation and Management
- Photochemistry and Electron Transfer Studies
- Cyclopropane Reaction Mechanisms
- Lignin and Wood Chemistry
- Chemical Synthesis and Reactions
- Hydrogen Storage and Materials
- Vanadium and Halogenation Chemistry
- Electrocatalysts for Energy Conversion
- Chemical Reactions and Mechanisms
- Spectroscopy and Quantum Chemical Studies
- Magnetism in coordination complexes
- Mesoporous Materials and Catalysis
- Oxidative Organic Chemistry Reactions
- Chemical Synthesis and Characterization
- Ammonia Synthesis and Nitrogen Reduction
Michigan State University
2015-2024
Great Lakes Bioenergy Research Center
2017-2019
Michigan United
2018
University of Michigan–Dearborn
2010
Pacific Northwest National Laboratory
2010
Brookhaven National Laboratory
1981-2004
RIKEN BNL Research Center
2003-2004
General Electric (United States)
1925-2002
Purdue University West Lafayette
1994-1996
The Ohio State University
1988-1996
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyridine ylide formation by capture of phenylchlorocarbene and tert-butylchlorocarbene. Reaction rates an alkylchlorocarbene laser flash photolysisJames E. Jackson, N. Soundararajan, Matthew S. Platz, Michael T. H. LiuCite this: J. Am. Chem. Soc. 1988, 110, 16, 5595–5596Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published inissue 1 August...
Electrocatalytic hydrogenation (ECH) is an option for stabilizing or upgrading bio-oil that employs mild conditions (≤80 °C and ambient pressure) compared to hydrotreatment. In this study, phenol, guaiacol (2-methoxyphenol), syringol (2,6-dimethoxyphenol) were chosen as model lignin-like substrates because of their abundance in high resistance relative the carbonyl compounds. Cathodic reduction was catalyzed by ruthenium supported on activated carbon cloth (Ru/ACC), a novel electrocatalyst....
Electrocatalytic hydrogenation (ECH) of guaiacol for production chemical and fuel in a divided cell using earth abundant metal electrodes. Specific energies shown below the organics are their higher heating values (HHV).
Roaming mechanisms, involving the brief generation of a neutral atom or molecule that stays in vicinity before reacting with remaining atoms precursor, are providing valuable insights into previously unexplained chemical reactions. Here, mechanistic details and femtosecond time-resolved dynamics H3+ formation from series alcohols varying primary carbon chain lengths obtained through combination strong-field laser excitation studies ab initio molecular calculations. For small alcohols, four...
Lignin valorization is increasingly important as biomass fractionation approaches achieve higher technology readiness levels. One approach to upgrade lignin first involves its deconstruction by fast pyrolysis create a lignin-derived bio-oil. The phenolics-rich liquid product promising feedstock for electrocatalytic hydrogenation, aromatics can be deoxygenated and saturated hydrogen chemisorbed on catalytic cathodes, mitigating the product's corrosivity raising energy content. By integrating...
An electride has been synthesized that is stable to auto-decomposition at room temperature. The key was the theoretically directed synthesis of a per-aza analogue cryptand[2.2.2] in which each linking arms contains piperazine ring. This complexant designed provide strong complexation Na+ via pre-organization "crypt" eight nonreducible tertiary amine nitrogens. structure and properties indicate that, as with other electrides, "anions" are electrons trapped cavities formed by close-packing...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe carbon 1-carbon 3 bond in [1.1.1]propellaneJames E. Jackson and Leland C. AllenCite this: J. Am. Chem. Soc. 1984, 106, 3, 591–599Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published inissue 1 February 1984https://pubs.acs.org/doi/10.1021/ja00315a022https://doi.org/10.1021/ja00315a022research-articleACS PublicationsRequest reuse permissionsArticle Views675Altmetric-Citations97LEARN ABOUT THESE...
Electrocatalytic hydrogenation (ECH) offers a new approach for bio-oil stabilization (a.k.a. partial upgrading). Water-soluble bio-oil, obtained by aqueous extraction of the liquid product biomass pyrolysis, was hydrogenated using ECH at room conditions. A electrocatalyst, ruthenium supported on activated carbon cloth, used as catalytic cathode. After electrocatalytic hydrogenation, aldehydes and ketones were reduced to corresponding alcohols or diols, forms less prone condensation...
Emerging work on organocatalytic enantioselective halocyclizations naturally draws conditions where both new bonds must be formed under delicate control, the reaction regime concerted nature of AdE3 mechanism is greatest importance. Without assistance, many simple alkene substrates react slowly or not at all with conventional halenium donors synthetically relevant conditions. As demonstrated earlier by Shilov, Cambie, Williams, Fahey, and others, alkenes can undergo a AdE3-type via...
Electrocatalytic hydrogenation offers a carbon and energy efficient strategy for upgrading pyrolytic bio-oil with renewable electricity in biomass processing depots.
We introduce a previously unexplored parameter-halenium affinity (HalA)- as quantitative descriptor of the bond strengths various functional groups to halenium ions. The HalA scale ranks potential ion acceptors based on their ability stabilize "free ion". Alkenes in particular but other Lewis bases well, such amines, amides, carbonyls, and ether oxygen atoms, etc., have been classified scale. This indirect approach enables rapid straightforward prediction chemoselectivity for systems...
Synopsis Three degrees of shade reduced forage yields, stands, root and rhizome underground reserves, available carbohydrates but increased moisture, lignin, crude protein, true P, Ca, Mg contents fertilized with 200 pounds N per acre. Rate yield reduction was much higher in heavily grass (1600 N) paralleled light reductions. Heavily showed less change chemical composition due to shade.
Abstract Strong-field laser-matter interactions often lead to exotic chemical reactions. Trihydrogen cation formation from organic molecules is one such case that requires multiple bonds break and form. We present evidence for the existence of two different reaction pathways H 3 + irradiated by a strong-field laser. Assignment was accomplished through analysis femtosecond time-resolved ionization photoion-photoion coincidence measurements carried out on methanol isotopomers, ethylene glycol,...
W. N. Haworth, J. Jackson and F. Smith, Chem. Soc., 1940, 620 DOI: 10.1039/JR9400000620
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCrystalline Salts of Na- and K- (Alkalides) that Are Stable at Room TemperatureJineun Kim, Andrew S. Ichimura, Rui H. Huang, Mikhail Redko, Richard C. Phillips, James E. Jackson, L. DyeView Author Information Department Chemistry Center for Fundamental Materials Research Michigan State University, East Lansing, 48824 Cite this: J. Am. Chem. Soc. 1999, 121, 45, 10666–10667Publication Date (Web):October 30, 1999Publication History Received28...
We report absolute and relative stereochemistry of addition in enantioselective chlorolactonizations 4-phenyl-4-pentenoic acid its related t-butyl ester, catalyzed by (DHQD)2PHAL. Predominant syn the chlorenium nucleophile across olefin is observed. As shown isotopic labeling, NMR spectroscopy, derivative studies, two new stereocenters formed double bond are set independently influenced different factors. These findings suggest a stepwise process via an intermediate capable lactone closure...
A remarkable solvent-controlled enantiodivergence is seen in the hydroquinidine 1,4-phthalazinediyl diether ((DHQD)2PHAL)-catalyzed chlorocyclization of unsaturated carbamates. Eyring plot analyses this previously unreported reaction are used to probe and compare R- S-selective pathways. In CHCl3/hexanes solvent system, pro-R process shows a surprising increase selectivity with increasing temperature. These studies point strongly solvent-dependent entropy-enthalpy balance between pro-S
Synopsis Annual forage yields increased as the interval between cuttings to 6 weeks, leveled off 12 weeks and dropped sharply in plots cut only once. Increasing decreased crude protein vitamin A equivalent content, leaf percent, vitro digestibility stem length fiber content. N applications of dry matter content but had no effect on percent grass.
Computed association energies and dissected nucleus-independent chemical shifts (NICS) document the mutual enhancement (or reduction) of intermolecular interactions aromaticity H-bonded substrates. H-bonding that increase cyclic 4n + 2 π-electron delocalization boost aromaticity. Conversely, such are weakened when is decreased as a result more localized quinoidal π character. Representative examples tautomeric equilibria π-conjugated heterocyclic compounds in protic solvents other...