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Nickel Cobalt Phosphides Quasi-Hollow Nanocubes as an Efficient Electrocatalyst for Hydrogen Evolution in Alkaline Solution

25-Nov-2015 | Yi Feng; Xinyao Yu; Ungyu Paik, Chemical Communication, 2015

A template-engaged strategy is used to synthesize nanostructured metal phosphides with different compositions. Among the as-synthesized metal phosphides, nickel cobalt phosphides quasi-hollow nanocubes exhibit the best electrocatalytic activity for hydrogen evolution reaction in terms of lower ...


Low-Temperature Synthesis of a TiO2/Si Heterojunction

20-Nov-2015 | Girija Sahasrabudhe; Sara M. Rupich; Janam Jhaveri; Alexander H. Berg; Ken A. Nagamatsu; Gabriel Man; Yves J. Chabal ..., Journal of the American Chemical Society, 2015

The classical SiO2/Si interface, which is the basis of integrated circuit technology, is prepared by thermal oxidation followed by high temperature (>800 °C) annealing. Here we show that an interface synthesized between titanium dioxide (TiO2) and hydrogen-terminated silicon (H:Si) is a highly ...


Secondary Sphere Hydrogen Bonding in Monocopper Complexes of Potentially Dinucleating Bis(carboxamide) Ligands

18-Nov-2015 | Benjamin D. Neisen, Pavlo V. Solntsev, Mohammad R. Halvagar, William B. Tolman, European Journal of Inorganic Chemistry, 2015

Abstract Reaction of a macrocyclic ligand precursor comprising two bis(carboxamido)pyridine units (H4L4) connected by ethylene linkers with NMe4OH and CuX2 (X = Cl, OAc, or OTf) yielded monocopper complexes [NMe4][(H2L4)Cu(X)] [X = Cl (3), OAc (4), or OH (5)], in contrast to the results of ...


Influence of hydrogen bonding interactions on the properties of ultraviolet‐curable coatings

17-Nov-2015 | Lu Shen, Jian Zheng, Ying Wang, Mangeng Lu, Kun Wu, Journal of Applied Polymer Science, 2015

ABSTRACT Phenolic novolac type epoxy resin has been modified with acrylic acid (AA) and 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid (AMPS) to form ultraviolet‐curable coatings, and integrated performances of the coatings were evaluated. It was found that the hydrogen bonding interactions ...


Unveiling Peculiar Hydrogen Bonding Behavior of Solvated N-Heterocyclic Carbenes

17-Nov-2015 | Oldamur Hollóczki, Physical Chemistry Chemical Physics, 2015

To investigate the hydrogen bonding and its dynamics of N-heterocyclic carbenes (NHCs) in solution, a molecular mechanical force field was fitted for the homologous series of imidazol-2-ylidenes. During the exploration of the potential energy surface of the water/1,3-dimethylimidazol-2-ylidene ...


Energies, Vol. 8, Pages 13021-13032: Effects of Alkali and Alkaline Earth Metals on N-Containing Species Release during Rice Straw Pyrolysis

17-Nov-2015 | Gao, Pan ; Xue, Lu ; Lu, Qiang ; Dong, Changqing, Energies, 2015

To study the effects of inherent and external alkali and alkaline earth metallic species (AAEMs, i.e., K, Ca and Mg) on the behavior of N-containing species release during rice straw (RS) pyrolysis, different pretreatments were applied in numerous experiments. Results indicate that ammonia (NH3) ...


Hydrogen Peroxide Complex of Zinc

17-Nov-2015 | Christian M. Wallen; John Bacsa; Christopher C. Scarborough, Journal of the American Chemical Society, 2015

Metal(H2O2) complexes have been implicated in kinetic and computational studies but have never been observed. Accordingly, H2O2 has been described as a very weak ligand. We report the first metal(H2O2) adduct, which is made possible by incorporating intramolecular hydrogen-bonding interactions ...


2-Hetaryl-1,3-tropolones based on five-membered nitrogen heterocycles: synthesis, structure and properties

12-Nov-2015 | Yury A. Sayapin, Inna O. Tupaeva, Alexandra A. Kolodina, Eugeny A. Gusakov, Vitaly N. Komissarov, Igor V. Dorogan, N ..., Beilstein Journal of Organic Chemistry, 2015

Abstract A series of derivatives of 2-hetaryl-1,3-tropolone (β-tropolone) was prepared by the acid-catalyzed reaction of 2-methylbenzoxazoles, 2-methylbenzothiazoles and 2,3,3-trimethylindoline with 3,4,5,6-tetrachloro-1,2-benzoquinone. The molecular structures of the three representative ...


Keto–Enol Tautomeric Equilibrium of Acetylacetone Solution Confined in Extended Nanospaces

10-Nov-2015 | Takehiko Tsukahara; Kyosuke Nagaoka; Kyojiro Morikawa; Kazuma Mawatari; Takehiko Kitamori, Journal of Physical Chemistry B, 2015

We aim to clarify the effects of size confinement, solvent, and deuterium substitution on keto–enol tautomerization of acetylacetone (AcAc) in solutions confined in 10–100 nm spaces (i.e., extended nanospaces) using 1H NMR spectroscopy. The keto–enol equilibrium constants of AcAc (KEQ = ...


Supramolecular Assembly of Poly(propyleneimine) Dendrimers Driven By Simple Monovalent Counterions

09-Nov-2015 | Seyed Ali Eghtesadi, Fadi Haso, Marjan Alsadat Kashfipour, Robert Scott Lillard, Tianbo Liu, Chemistry - A European Journal, 2015

Abstract The self‐assembly of semiglobular, positively charged poly(propyleneimine) (PPI) dendrimers with small monovalent counterions (e.g., Cl−) in water/acetone mixtures was investigated. We showed that PPI dendrimers can assemble into hollow, spherical, single‐layered blackberry‐type ...


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