Results 201 to 210 of about 304,110 (261)

Microenvironmental Tuning in Isostructural Conjugated Metal–Organic Frameworks for Superior Photocatalytic H2O2 Generation

Angewandte Chemie, EarlyView.
Two isostructural conjugated‐MOFs (Fe‐Tp and Mn‐Tp) photocatalysts were engineered with nonequivalent microenvironmental redox tuning for hydrogen peroxide production. The manganese analog engages both the oxygen reduction reaction and the water oxidation reaction while suppressing decomposition, delivering 10 487 µmol g−1 h−1 with an apparent quantum ...
Kayaramkodath Chandran Ranjeesh, Avanti Chakraborty, Pilar Pena Sánchez, Jose Ignacio Martinez, Abdul Khayum Mohammed, Nada Elmerhi, Stefano Canossa, Matjaž Finšgar, Felipe Gándara, Pradip Pachfule, Dinesh Shetty   +10 more
wiley   +1 more source

Borylcyclopropanes: Synthetic Strategies and Applications

Angewandte Chemie, EarlyView.
Borylcyclopropanes (cyclopropanes bearing a boron substituent) sit at the intersection of two privileged frameworks in synthesis. This review provides the first exhaustive survey of their chemistry, spanning metal–carbene, nucleophilic cyclization, radical, hydroboration, and C─H activation routes, and documenting applications in medicinal chemistry ...
Aiza A. Butt, Joseph M. Ready
wiley   +1 more source

Nitrogen Radical Photocatalysed Reduction of Nitrous Oxide

Angewandte Chemie, EarlyView.
This work offers the first example of reduction of the potent greenhouse gas N2O to the benign products N2 and O(Bpin)2 using a nitrogen‐based catalyst. The active catalyst is shown to be a nitrogen‐based radical which operates under photocatalytic conditions.
Reece Lister‐Roberts, Agamemnon E. Crumpton, Meera Mehta   +2 more
wiley   +1 more source

Enhanced detection of aromatic oxidation products using NO₃ ^- chemical ionization mass spectrometry with limited nitric acid.

Environ Sci Atmos
Garmash O, Kumar A, Jha S, Barua S, Hyttinen N, Iyer S, Rissanen M.   +6 more
europepmc   +1 more source

Assessing the importance of nitric acid and ammonia for particle growth in the polluted boundary layer.

Environ Sci Atmos
Marten R, Xiao M, Wang M, Kong W, He XC, Stolzenburg D, Pfeifer J, Marie G, Wang DS, Elser M, Baccarini A, Lee CP, Amorim A, Baalbaki R, Bell DM, Bertozzi B, Caudillo L, Dada L, Duplissy J, Finkenzeller H, Heinritzi M, Lampimäki M, Lehtipalo K, Manninen HE, Mentler B, Onnela A, Petäjä T, Philippov M, Rörup B, Scholz W, Shen J, Tham YJ, Tomé A, Wagner AC, Weber SK, Zauner-Wieczorek M, Curtius J, Kulmala M, Volkamer R, Worsnop DR, Dommen J, Flagan RC, Kirkby J, McPherson Donahue N, Lamkaddam H, Baltensperger U, El Haddad I.   +46 more
europepmc   +1 more source

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Acidities of Nitrous and Nitric Acids

European Journal of Inorganic Chemistry, 2005
AbstractThe energies of nitrous and nitric acid and their anions were calculated at the MP2(FC)/6‐311++G(2d,2p) level. Their acidity was related to the acidity of hydroxylamine derivatives using isodesmic reactions. This procedure reveals that the molecules of HNO2 and HNO3 are strongly stabilized (by 119 or 206 kJ·mol–1, respectively) but their anions
Otto Exner, Stanislav Boehm
openaire   +1 more source

Aspects of the surface and bulk nitration of cellulose in nitric acid, nitric acid/water, and nitric acid/dichloromethane mixes

Journal of Applied Polymer Science, 1990
AbstractElectron spectroscopy for chemical analysis (ESCA) has been employed to follow the surface nitration of cellulose papers in nitric acid–water and nitric acid–dichloromethane mixes with the aim of: elucidating the identity of the nitrating species in these mixes and from comparison of surface and bulk degree of substitution (DOS) further ...
R. D. Short, H. S. Munro
openaire   +1 more source

Acidity of nitrous and nitric acids

Inorganic Chemistry, 1988
The origin of the acidity of nitrous and nitric acids was studied via an analysis of the results of ab initio calculations using the 6-311++G** basis set. The difference in energy between the Z and E conformers of nitrous acid could be reproduced when correction was made for electron correlation, and the gas-phase ionization energies of nitrous and ...
openaire   +1 more source

First-Principles Infrared Spectrum of Nitric Acid and Nitric Acid Monohydrate Crystals

The Journal of Physical Chemistry A, 2004
The spectra of nitric acid and nitric acid monohydrate crystals, including both vibration frequencies and infrared intensities, have been calculated from first principles using the methodology developed for the SIESTA program. In this method, infrared intensities are evaluated from the macroscopic polarization changes with atomic displacements per ...
Fernández Torre, Delia, Escribano, Rafael, Archer, Tom, Pruneda, Miguel, Artacho, Emilio   +4 more
openaire   +2 more sources