The oxidation of 2-iodo-N,N-dialkylanilines with an excess of dimethyldioxirane in acetone affords 2-iodyl-N,N-dialkylaniline oxides, structural features of which are in agreement with the new heterocyclic system of benziodoxazole.

Field measurements in the Arcachon Bay (south-west France) indicated anaerobic production of NOx via nitrification which was coupled to the reduction of Mn-oxides. To provide evidence for the occurrence of this process, laboratory microcosm experiments were set up. A N tracer based approach was used to track if NOx produced through Mn-oxide mediated anaerobic nitrification would be reduced to N...

We report the synthesis of the rock salt derived structures of Li4MSbO6 (M(iii) = Cr, Mn, Al, Ga) oxides. These layered oxides are shown to have the formation of preferred cationic mixing in the (LiMSbO6)(3-) layers based on single crystal and powder XRD studies, in addition to the cation- (Li(+) ions versus (Li(+)/M(3+)/Sb(5+)) ions) ordering observed in several α-NaFeO2 type oxides. The addit...

A number of hydrothermal vent sites exist on the summit of the Loihi Seamount, a shield volcano that is part of the Hawaiian archipelago. The vents are 1,100 to 1,325 m below the surface and range in temperature from slightly above ambient (10 degrees C) to high temperature (167 degrees C). The vent fluid is characterized by high concentrations of CO2 (up to 17 mM) and Fe(II) (up to 268 microM)...

We have investigated the structural, electronic, and vibrational properties of graphene oxide based on first-principles density-functional calculations. A twist-boat conformation is identified as the energetically most favorable nonmetallic configuration for fully oxidized graphene. The calculated Raman G-band blue shift is in very good agreement with experimental observations. Our results prov...

Under high pressure, krypton, one of the most inert elements is predicted to become sufficiently reactive to form a new class of krypton compounds; krypton oxides. Using modern ab-initio evolutionary algorithms in combination with Density Functional Theory, we predict the existence of several thermodynamically stable Kr/O species at elevated pressures. In particular, our calculations indicate t...

We demonstrate O(2) plasma treated graphene oxides with a work function of 5.2 eV as a high performance hole transport layer in organic solar cells. The high transparency and high work function simultaneously increase short circuit current, threshold voltage and fill factor, resulting in a 30% increase in cell efficiency.

NdCoO3, and LaCoO3, are strikingly similar to each other and to RCo03 where R (6) is the natural rare earth mixture as mined. We suggest, therefore, that the unseparated rare earth oxides can be used to make a cheap auto exhaust oxidation catalyst. LEE A. PEDERSEN W. F. LIBBY Department of Chemistry and Institute of Geophysics and Planetary Physics, University of California, Los Angeles 90024 R...

Perovskite ABO3 oxides display many promising functional properties including ferroelectricity and magnetism. An ongoing challenge has been to design and synthesize materials in which ferroelectric and magnetic orderings not only coexist in a single phase above room temperature, but also are nontrivially coupled. Such a cross coupling between these different ferroic orderings could lead to many...

Positron annihilation spectroscopy, when combined with highquality supporting modeling of positron states and annihilation in matter, is a powerful tool for detailed defect identification of vacancy-type defects in semiconductors and oxides. Here we demonstrate that the Doppler broadening of the positron annihilation radiation is a very sensitive means for observing the oxygen environment aroun...