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An H2S-sensing/CO-releasing flavonol that operates via logic gates

An H2S-sensing/CO-releasing flavonol that operates via logic gates

Dec. 13, 2017

Tatiana Soboleva, Abby D. Benninghoff, and Lisa M. Berreau

Signaling molecules, including H2S and CO, are involved in a complex interplay within cells to maintain cellular homeostasis. In order to investigate the intracellular interplay of different gasotrans...

Designer Two-Electron Storage Viologen Anolyte Materials for Neutral Aqueous Organic Redox Flow Batteries

Designer Two-Electron Storage Viologen Anolyte Materials for Neutral Aqueous Organic Redox Flow Batteries

Nov. 01, 2017

Camden DeBruler, Bo Hu, Jared Moss, Xuan Liu, Jian Luo, Yujie Sun, T. Leo Liu

Renewable energy (e.g., solar and wind) can make a significant contribution to meeting the increasing global energy demands. However, its successful penetration into the existing electrical grids requ...

Halogen Bonds Formed between Substituted Imidazoliums and N Bases of Varying N-Hybridization

Halogen Bonds Formed between Substituted Imidazoliums and N Bases of Varying N-Hybridization

Sep. 27, 2017

Scheiner, S.I

Heterodimers are constructed containing imidazolium and its halogen-substituted derivatives as Lewis acid. N in its sp3, sp2 and sp hybridizations is taken as the electron-donating base. The halogen b...

A bi­pyridine-ligated zinc(II) complex with bridging flavonolate ligation: synthesis, characterization, and visible-light-induced CO release reactivity

A bi­pyridine-ligated zinc(II) complex with bridging flavonolate ligation: synthesis, characterization, and visible-light-induced CO release reactivity

Sep. 01, 2017

S. Sorenson, M. Popova, A. M. Arif, and L. M. Berreau

Metal–flavonolate compounds are of significant current inter­est as synthetic models for quercetinase enzymes and as bioactive compounds of importance to human health. Zinc–3-hy­droxy­flavonola...

Mechanism of Nitrogenase H2 Formation by Metal-Hydride Protonation Probed by Mediated Electrocatalysis and H/D Isotope Effects

Mechanism of Nitrogenase H2 Formation by Metal-Hydride Protonation Probed by Mediated Electrocatalysis and H/D Isotope Effects

Aug. 29, 2017

Nimesh Khadka, Ross D. Milton, Sudipta Shaw, Dmitriy Lukoyanov, Dennis R. Dean, Shelley D. Minteer, Simone Raugei, Brian M. Hoffman , and Lance C. Seefeldt

Nitrogenase catalyzes the reduction of dinitrogen (N2) to two ammonia (NH3) at its active site FeMo-cofactor through a mechanism involving reductive elimination of two [Fe–H–Fe] bridging hydrides ...

MgCl2/AlCl3 electrolytes for reversible Mg deposition/stripping: electrochemical conditioning or not?

MgCl2/AlCl3 electrolytes for reversible Mg deposition/stripping: electrochemical conditioning or not?

Aug. 24, 2017

Shuijian, H., Jian, L., Liu, T.L

To elucidate the discrepancy of electrochemical performance of inorganic MgCl2/AlCl3 electrolytes in ethereal solvents, we conducted a systematic study of MgCl2/AlCl3–DME electrolytes under differen...

The Electron Bifurcating FixABCX Protein Complex from Azotobacter vinelandii: Generation of Low-Potential Reducing Equivalents for Nitrogenase Catalysis

The Electron Bifurcating FixABCX Protein Complex from Azotobacter vinelandii: Generation of Low-Potential Reducing Equivalents for Nitrogenase Catalysis

Jul. 13, 2017

Rhesa N. Ledbetter , Amaya M. Garcia Costas, Carolyn E. Lubner, David W. Mulder, Monika Tokmina-Lukaszewska, Jacob H. Artz, Angela Patterson, Timothy S. Magnuson, Zackary J. Jay, H. Diessel Duan, Jacquelyn Miller, Mary H. Plunkett, John P. Hob

The Sun group reported a combined experimental and theoretical study on the investigation of the intrinsic activities of three nickel sulfides, NiS, NiS2, and Ni3S2, for electrocatalytic H2 generation...

Recent advances on MgCl2 based electrolytes for rechargeable Mg batteries

Recent advances on MgCl2 based electrolytes for rechargeable Mg batteries

Jul. 06, 2017

Shuijian, H., Kevin , N., Jian, L., Liu, T.L

Recently, rechargeable Mg batteries have gained increasing attention. Research efforts have been mainly focused on the development of advanced Mg electrolytes with good reversibility and small overpot...

Universal interrelation between measures of particle and polymer size

Universal interrelation between measures of particle and polymer size

Jul. 06, 2017

F. Vargas-Lara, M.L. Mansfield, J.F. Douglas

This paper explores interrelationships between the intrinsic viscosity, the hydrodynamic (or Stokes) radius, and the radius of gyration of polymers and particles....

Sense and Release: A Thiol-Responsive Flavonol-Based Photonically Driven Carbon Monoxide-Releasing Molecule That Operates via a Multiple-Input AND Logic Gate

Sense and Release: A Thiol-Responsive Flavonol-Based Photonically Driven Carbon Monoxide-Releasing Molecule That Operates via a Multiple-Input AND Logic Gate

Jul. 05, 2017

Tatiana Soboleva, Hector J. Esquer, Abby D. Benninghoff, and Lisa M. Berreau

Molecular structures capable of intracellular information processing that couple responses from biomarker signals to the release of drug molecules represent intelligent delivery systems. Herein we rep...

Transition States and Control of Substrate Preference in the Promiscuous Phosphatase PP1

Transition States and Control of Substrate Preference in the Promiscuous Phosphatase PP1

Jul. 05, 2017

Yuan Chu, Nicholas H. Williams, and Alvan C. Hengge

Catalytically promiscuous enzymes are an attractive frontier for biochemistry, because enzyme promiscuities not only plausibly explain enzyme evolution through the mechanism of gene duplication but al...

Conformational regulation of CRISPR-associated nucleases

Conformational regulation of CRISPR-associated nucleases

Jun. 15, 2017

Jackson, R., van Erp, P.B, Sternberg, S.H, Wiedenheft, B.

Adaptive immune systems in bacteria and archaea rely on small CRISPR-derived RNAs (crRNAs) to guide specialized nucleases to foreign nucleic acids. The activation of these nucleases is controlled by a...

Efficient H2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst

Efficient H2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst

May. 30, 2017

You, B., Liu, X., Liu, X., Sun, Y.

Water electrolysis to produce H2 and O2 with renewable energy input has been generally viewed as an attractive route to meet future global energy demands. However, the sluggish O2 evolution reaction u...

Detection and quantification of gas-phase oxidized mercury compounds by GC/MS

Detection and quantification of gas-phase oxidized mercury compounds by GC/MS

May. 18, 2017

Jones C.P., Lyman S.N., Jaffe D.A., Allen T., O’Neil T.L.

We have developed a gas chromatography/mass spectrometry (GC-MS)-based system for identification and quantification of atmospheric oxidized mercury compounds. The system consists of ......

Quantification of low molecular weight n-alkanes in lake sediment cores for paleoclimate studies

Quantification of low molecular weight n-alkanes in lake sediment cores for paleoclimate studies

May. 16, 2017

Aebig, C.H.F., Curtin, L., Hageman, K.J., Moy, C.M., Beltran, C.

Organic biomarkers, such as n-alkanes, can be used as proxies in a range of paleoclimate and paleoenvironmental investigations. n-Alkanes accumulate in lacustrine sediments and can therefore be used t...

Electrocatalysis of Furfural Oxidation Coupled with H2 Evolution via Nickel-Based Electrocatalysts in Water

Electrocatalysis of Furfural Oxidation Coupled with H2 Evolution via Nickel-Based Electrocatalysts in Water

May. 03, 2017

Jiang, N., Liu, X., Dong, J., You, B., Liu, X., Sun, Y.

Electrocatalytic water splitting has been widely considered as a promising approach to produce clean H2. The anodic half reaction of water splitting, the O2 evolution reaction (OER), is the kinetic bo...

Assembly of Effective Halide Receptors from Components. Comparing Hydrogen, Halogen, and Tetrel Bonds

Assembly of Effective Halide Receptors from Components. Comparing Hydrogen, Halogen, and Tetrel Bonds

Apr. 20, 2017

Scheiner, S.I

Receptors for halide anions are constructed based on the imidazolium unit and then replacing the H-bonding C–H group first by halogen-bonding C–I and then by tetrel-bonding C–SnH3 and C–SiF3. ...

Properties of a flavonol-based photoCORM in aqueous buffered solutions: influence of metal ions, surfactants and proteins on visible light-induced CO release

Properties of a flavonol-based photoCORM in aqueous buffered solutions: influence of metal ions, surfactants and proteins on visible light-induced CO release

Apr. 19, 2017

Lisa Berreau, Marina Popova, Tatiana Soboleva, Atta M. Arif

The properties of the extended flavonol 3-hydroxy-2-phenyl-benzo[g]chromen-4-one (2a) in DMSO : aqueous buffer solutions at pH = 7.4, including in the presence of metal ions, surfactants and serum alb...

A stable compound of helium and sodium at high pressure

A stable compound of helium and sodium at high pressure

Feb. 06, 2017

Xiao Dong, Artem R. Oganov, Alexander F. Goncharov, Elissaios Stavrou, Sergey Lobanov, Gabriele Saleh, Guang-Rui Qian, Qiang Zhu, Carlo Gatti, Volker L. Deringer, Richard Dronskowski, Xiang-Feng Zhou, Vitali B. Prakapenka, Zuzana Konôpková, Ivan A. Popov,

Helium is generally understood to be chemically inert and this is due to its extremely stable closed-shell electronic configuration, zero electron affinity and an unsurpassed ionization potential. It ...

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