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Efficient and Stable MoS2/CdSe/NiO Photocathode for Photoelectro‐chemical Hydrogen Generation from Water

23-May-2015 | Yuming Dong, Yanmei Chen, Pingping Jiang, Guangli Wang, Xiuming Wu, Ruixian Wu, Chi Zhang, Chemistry - An Asian Journal, 2015

A novel CdSe/NiO heteroarchitecture was designed, prepared and used as photocathode for hydrogen generation from water. The composite films were structurally, optically, and photoelectrochemically characterized. The deposition of CdSe on the NiO film enhanced light harvesting in the visible ...

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Time Dependence of Silica Surfaces on Their Interactions in Water and Alkaline Solutions

22-May-2015 | Cathy E. McNamee; Ko Higashitani, Langmuir, 2015

Spherical silica particles are widely used to study the stability of colloids. This is because the stability of silica particles is important in industrial processes and also because monodispersed particles are available in various sizes, allowing fundamental investigations on colloidal stability ...

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Intramolecular Hydrogen Bond Involving Organic Fluorine in the Derivatives of Hydrazides: An NMR Investigation substantiated by DFT based theoretical calculations

20-May-2015 | Sandeep K Mishra; Suryaprakash Nagaraja Rao, Physical Chemistry Chemical Physics, 2015

The rare examples of intramolecular Hydrogen bonds (HB) of the type the N−H•••F−C, detected in a low polarity solvent in the derivatives of hydrazides, by utilizing one and two-dimensional solution state multinuclear NMR techniques, are reported. The observation of through-space couplings, such ...

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Probing the Physicochemical Boundaries of Cell Permeability and Oral Bioavailability in Lipophilic Macrocycles Inspired by Natural Products

20-May-2015 | Andrew T. Bockus; Katrina W. Lexa; Cameron R. Pye; Amit S. Kalgutkar; Jarret W. Gardner; Kathryn C. R. Hund; William ..., Journal of Medicinal Chemistry, 2015

Cyclic peptide natural products contain a variety of conserved, nonproteinogenic structural elements such as d-amino acids and amide N-methylation. In addition, many cyclic peptides incorporate γ-amino acids and other elements derived from polyketide synthases. We hypothesized that the position ...

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Thermodynamic Properties of Inclusion Complexes between β-Cyclodextrin and Naphthenic Acid Fraction Components

19-May-2015 | Mohamed H. Mohamed; Lee D. Wilson; John V. Headley; Kerry M. Peru, Energy & Fuels, 2015

The spectral displacement technique was used to determine the 1:1 equilibrium binding constants (K2) of the complexes formed between β-cyclodextrin and carboxylate anion guests, including either single components or mixtures in aqueous solution at variable temperatures (25–55 °C). A van’t Hoff ...

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“Zwitterionic Proton Sponge” Hydrogen Bonding Investigations on the Basis of Car–Parrinello Molecular Dynamics

19-May-2015 | Aneta Jezierska; Jarosław J. Panek, Journal of Chemical Information and Modeling, 2015

1,8-Bis(dimethylamino)-4,5-dihydroxynaphthalene has been investigated on the basis of static DFT computations and Car–Parrinello molecular dynamics. The simulations were performed in the gas phase and in the solid state. The studied “zwitterionic proton sponge” possesses two, short intramolecular ...

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Frustrated Lewis Pair Chemistry: Development and Perspectives

14-May-2015 | Douglas W. Stephan, Gerhard Erker, Angewandte Chemie International Edition, 2015

Abstract Frustrated Lewis pairs (FLPs) are combinations of Lewis acids and Lewis bases in solution that are deterred from strong adduct formation by steric and/or electronic factors. This opens pathways to novel cooperative reactions with added substrates. Small‐molecule binding and activation ...

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Effects of nano‐tio2 on the performance of high‐amylose starch based antibacterial films

14-May-2015 | Chao Liu, Hanguo Xiong, Xing Chen, Shun Lin, Yanhua Tu, Journal of Applied Polymer Science, 2015

ABSTRACT The purpose of this article is to investigate the effects of nano‐tianium dioxide (nano‐TiO2) on the high‐amylose starch/polyvingl alcohol (PVA) blend films prepared by a solution casting method. The results show that at the concentration of 0.6% of nano‐TiO2, the film demonstrated ...

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Salting‐Out of Acetone, 1‐Butanol, and Ethanol from Dilute Aqueous Solutions

14-May-2015 | Shaoqu Xie, Conghua Yi, Xueqing Qiu, AIChE Journal, 2015

ABSTRACT The salting‐out phase equilibria for acetone, 1‐butanol, and ethanol (ABE) from dilute aqueous solutions by using potassium carbonate (K2CO3) and dipotassium hydrogen phosphate trihydrate (K2HPO4·3H2O) as outstanding salting‐out agents were investigated. Increasing the salt ...

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Intramolecularly Bridged Calix[4]arenes with Pronounced Complexation Ability toward Neutral Compounds

14-May-2015 | Petr Slavík; Václav Eigner; Pavel Lhoták, Organic Letters, 2015

Regioselective derivatization via an organomercury intermediate allowed for the introduction of carboxylic acid functionality into the meta position of the calix[4]arene skeleton. Intramolecular Friedel–Crafts cyclization led to a novel type of calixarene containing a ketone bridging moiety. ...

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