In this study, three different Ag micro/nano leaves were successfully synthesized through a galvanic displacement reaction by adjusting the concentration of Ag+. The catalytic activities of the prepared Ag micro/nano leaves toward ORR showed strong dependence on their morphology. An optimal concentration of Ag+ can result in a well-defined Ag micro...
The authors describe their experience in implementing the program «Ural engineering school» through the subjects of physics and chemistry, as well as extracurricular activities and educational work.
A series of hypergolic salts based on [B12H11NH3](-) anion were synthesized. The resulting six salts were characterized by H-1 and C-13 NMR, IR, ESI-MS and EA. Their key properties were measured or calculated, including melting points (133.9-210.7 degrees C), decomposition temperatures (215.6-278.2 degrees C), and heats of formation (-40.1 to 1073....
Nowadays, highly efficient decomposition of ozone is still technologically challenging, especially in the presence of high humidity levels. In this study, Cu2O/reduced graphene oxide composite (Cu2O/rGO) is in-situ synthesized by reducing a mixed solution of Cu2+ and GO. This developed catalytic system exhibits 100% ozone (20 ppm O-3/air) decomposi...
In hypergolic propellants, hypergolicity is an extremely important parameter in evaluating fuels. In this study, a new family of hypergolic metal (Cu2+, Ni2+, Zn2+) complexes with B12H122- were synthesized and fully characterized. Two of these six complexes exhibited ultrashort ignition delay times (ca. 1 ms), with white fuming nitric acid as the o...
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A class of azetidinium-based hypergolic ionic liquids was synthesized and characterized by H-1 and (CNMR)-C-13, IR spectroscopies, and electrospray ionization mass spectrometry. The properties of six synthesized ionic liquids were characterized with respect to liquid range (-80-200 degrees C), density (0.99-1.05 gcm(-3)), heat of formation (0.70-2....
Nanocrystal ligand interactions and ligand exchange processes are usually described by a uniform distribution of equal binding sites. Here, we analyze this assumption by a quantitative study of the displacement of Z-type cadmium oleate ligands from CdSe nanocrystals by addition of L-type ligands. First, we determined the stoichiometry of the displa...
Recently the first pheromone of a marine diatom was identified to be the diketopiperazine (S,S)-diproline. This compound facilitates attraction between mating partners in the benthic diatom Seminavis robusta. Interestingly, sexualized S. robusta cells are attracted to both the natural pheromone (S,S)-diproline as well as to its enantiomer (R,R)-dip...
