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Measuring Electrostatic Fields in Both Hydrogen Bonding and non-Hydrogen Bonding Environments using Carbonyl Vibrational Probes
Ribonucleases Molecular Probes Protein Conformation Vibration Acetophenones Molecular Dynamics Simulation Static Electricity Hydrogen Bonding Solvents
2016/5/25
Vibrational probes can provide a direct readout of the local electrostatic field in complex molecular environments, such as protein binding sites and enzyme active sites. This information provides an ...
Decomposition of Vibrational Shifts of Nitriles into Electrostatic and Hydrogen-Bonding Effects
Pseudomonas putida Nitriles Steroid Isomerases Spectrophotometry, Infrared Magnetic Resonance Spectroscopy Catalytic Domain Hydrogen Bonding Vibration Static Electricity
2016/5/25
Infrared (IR) band shifts of isolated vibrational transitions can serve as quantitative and directional probes of local electrostatic fields, due to the vibrational Stark effect. However, departures f...
Hydrogen Bonding Modulates Binding of Exogenous Ligands in a Myoglobin Proximal Cavity Mutant
Alanine Amino Acid Substitution Animals Binding Sites Glycine Histidine Hydrogen Bonding Imidazoles Ligands Macromolecular Substances Metmyoglobin Models, Chemical Mutagenesis, Insertional Myoglobin Nitric Oxide Nuclear Magnetic Resonance,Biomolecular Protons Serine Threonine Whales
2016/5/23
In the sperm whale myoglobin mutant H93G, the proximal histidine is replaced by glycine, leaving a cavity in which exogenous imidazole can bind and ligate the heme iron (Barrick, D. (1994) Biochemistr...
Spectroscopic Study of Ser92 Mutants of Human Myoglobin:Hydrogen Bonding Effect of Ser92 to Proximal His93 on Structure and Property of Myoglobin
Carbon Monoxide Cyanides Escherichia coli Ferric Compounds Ferrous Compounds Histidine Humans Hydrogen Bonding Magnetic Resonance Spectroscopy Mutagenesis Myoglobin Myoglobin Oxygen Polymerase Chain Reaction Recombinant Fusion Proteins Serine Serine Spectrophotometr Spectrum Analysis, Raman Structure-Activity Relationship
2016/5/23
Neutron diffraction studies have demonstrated that the hydroxyl group oxygen of Ser92(F7) is hydrogen bonded to the proximal His93(48) N epsilon H proton in myoglobin (Mb) [Cheng, X., & Shoenborn, B. ...
Competition between hydrogen bonding and electric field in single-file transport of water in carbon nanotubes
hydrogen bonding and electric field single-file transport carbon nanotubes
2011/9/15
Recent studies have shown the possibility of water transport across carbon nanotubes, even in the case of nanotubes with small diameter (0.822 nm). In this case, water shows subcontinuum transport fol...
Effect of Hydrogen Bonding Interaction on the Properties of Caprolactam-Modified Casein/Waterborne Polyurenthane Composite
Hydrogen Bonding Interaction Modified Casein Waterborne Polyurethane (WPU)
2011/12/15
Caprolactam modified casein(CA-CPL) was prepared by using casein and caprolactam firstly. Caprolactam modified casein/waterborne polyurethane composite (CA-CPL/WPU) was prepared from CA-CPL and WPU. E...
Dinuclear Molybdenum Tetracarbonyl Complexes of Tetradentate Nitrogen Ligands and Intermolecular Hydrogen Bonding in the Crystal Structure of N,N´-bis-[1-(pyridin-2-yl)ethylidene]-ethane-1,2-diamine
Dinuclear intermolecular H-bonding molybdenum polyimines Schiff base tetracarbonyl
2010/4/8
Multidentate N-ligands (Schiff bases) were prepared by the condensation of 2-acetylpyridine or 2-benzoylpyridine, and 1,2-diaminoethane or 1,6-diaminohexane (2:1 ratio) in ethanol. These ligands were ...
Conformational Stability of Furfural in Aqueous Solution: The Role of Hydrogen Bonding
Furfural Aqueous Solution Hydrogen Bonding
2010/10/18
The importance of hydration on the equilibrium involving internal rotation around carbon-carbon single bond is investigated for the furfural molecule dissolved in water. To analyze the solvent effects...
2H NMR spectra of synthetic deuterated kaolinite have been collected in the temperature range from 150 K to 350 K. Hydroxyl groups show a Pake doublet pattern with an asymmetry factor of 0. They are a...
Adsorption Of Ethylenediamine (EDA) On Montmorillonite Saturated with Different Cations—V. Ammonium- and Triethylammonium-Montmorillonite: Ion-Exchange, Protonation and Hydrogen-Bonding
Triethylammonium-Montmorillonite Adsorption Ethylenediamine
2012/2/15
On NH4- as well as on (C2H5)3NH-montmorillonite EDA was adsorbed in protonated form. The extent of protonation depended on the relative basicities and concentrations of the interacting compounds. In t...
Adsorption of Ethylenediamine (EDA) on Montmorillonite Saturated with Different Cations IV: Al-, Ca- and Mg-Montmorillonite: Protonation, Ion-Exchange, Co-ordination and Hydrogen-Bonding
Adsorption Ethylenediamine Montmorillonite Hydrogen-Bonding
2012/2/14
Ethylenediamine (EDA) adsorbed from aqueous solution or vapor phase on Al-, Ca- and Mg-montmorillonite was retained to a more or less large extent in protonated form. The NH3+ :NH2 ratio decreased wit...
Adsorption of Ethylenediamine (EDA) on Montmorillonite Saturated with Different Cations—III. Na-, K- and Li-Montmorillonite: Ion-Exchange, Protonation, Co-Ordination and Hydrogen-Bonding
Adsorption of Ethylenediamine Montmorillonite Co-Ordination Hydrogen-Bonding
2011/11/18
Abstract: Ethylenediamine (EDA) is adsorbed from aqueous solution on Na-, K- and Li-montmorillonite as the monoprotonated cation (EDAH+) through an ion-exchange process. On washing with distilled wate...
Adsorption of Ethylenediamine (EDA) on Montmorillonite Saturated with Different Cations—II. Hydrogen- and Ethylenediammonium-Montmorillonite: Protonation and Hydrogen Bonding
Ethylenediammonium-Montmorillonite Montmorillonite Protonation Hydrogen Bonding
2012/2/17
The form under which ethylenediamine (EDA) is adsorbed from aqueous solution by hydrogen- and ethylenediammonium-montmorillonite was studied as a function of the amount of amine present in the system....