We report the quantum efficiency of photoluminescence processes of Er optical centers as well as the thermal quenching mechanism in GaN epilayers prepared by metal-organic chemical vapor deposition. High resolution infrared spectroscopy and temperature dependence measurements of photoluminescence intensity from Er ions in GaN under resonant excitation excitations were performed. Data provide a ...

Temperature-dependent yellow-to-red colour changes of uranyl thiocyanate complexes with 1-alkyl-3-methylimidazolium cations have been studied by different spectroscopic methods and this phenomenon is attributed to changes in the local environment of the uranyl ion, including the coordination number, as well as to cation-anion interactions.

The title complex, [Cd(C9H7O2)2(H2O)2], was obtained as an unintended product of the reaction of cadmium nitrate with hexa-methyl-ene-tetra-mine and cinnamic acid. The Cd(II) ion lies on a twofold rotation axis and is coordinated in a slightly distorted trigonal-prismatic environment. In the crystal, the V-shaped mol-ecules are arranged in an inter-locking fashion along [010] and O-H⋯O hydrogen...

Nitrate ions are one of the causes surface water eutrophication. In present research, effective adsorption nitrate (NO3) on bioadsorbents prepared from yam skins (Dioscorea alata) was evaluated. The skin chemically modified with ammonium chloride (NH4Cl), and biochar thermally biomass. results were compared commercial coal (CC). characterized by SEM-EDS analysis, which showed that synthesized a...

In order to reduce the impact of eutrophication caused by agricultural residues (i.e., excess nitrate) in aqueous solution, economic and effective anionic sorbents are required. In this article, we prepared anionic sorbent using wheat straw. Its structural characteristics and adsorption properties for nitrate removal from aqueous solution were investigated. The results indicate that the yield o...

In this work, the photocatalytic reduction of nitrate in water was examined using zinc oxide loaded with platinum nanoparticles and formic acid as a hole scavenger (electron donor). The data obtained in the structural characterization and in the nitrate photoreduction experiments showed that 1wt% Pt/ZnO photocatalyst had the highest photocatalytic activity and selectivity toward nitrogen. Selec...

In the title coordination polymer, [Cu(NO(3))(2)(C(12)H(12)N(2)O(2))](n), the Cu(II) ion, situated on an inversion center, is coordinated by two O atoms from two nitrate anions and two N atoms from two 1,4-bis-(4,5-dihydro-1,3-oxazol-2-yl)benzene (L) ligands in a distorted square-planar geometry. Each L ligand also lies across an inversion center and bridges two Cu(II) ions, forming a polymeric...

In the title compound, [Cd(NO(3))(2)(C(18)H(16)N(2)O(2))(2)](n), the six-coordinated Cd(II) ion is located on an inversion center and has a distorted octa-hedral environment defined by four N atoms from four 1,4-bis-(pyridin-3-ylmeth-oxy)benzene ligands and two O atoms from two nitrate anions. The ligands link the Cd(II) ions into a ribbon-like structure running along [201]. One O atom of the n...