Susumu IkenoThe Japan Institute of Metals and MaterialsMatsuda K, Taniguchi S, Kido K, Uetani Y, Ikeno S. Effects of Cu and transition metals on the precipitation behaviors of meta- stable phases at 523 K in Al-Mg-Si Alloys. Mater Trans. 2002;43:2789-95....
Transition metalsalso catalyze isotopic exchange reactions. Platinum is the most active catalyst for mostheterocycles. The mechanism may involve metallation, addition, σ-addition, and π-complex formation. α-Hydrogen exchange in pyridine is favored over β- and γ-positions, particularly by a cobalt...
metal–oxygen batteries, supercapacitors, fuel cells, and lithium batteries. In the case of electrolytic water, there are two main processes: hydrogen and oxygen precipitation, which
precipitation hardeningphase identificationnickelzirconiumThe present study was carried out to investigate the effects of minor additions of Ni and Zr, individually or in combination, on the microstructure and tensile properties of 354 casting alloy (Al–9 wt%Si–1.8 wt%Cu–0.5 wt%Mg) at...
We report a simple one-pot synthesis of uniform transition metal difluoride MF2 (M = Fe, Mn, Co) nanorods based on transition metal trifluoroacetates (TMTFAs) as single-source precursors. The synthesis of metal fluorides is based on the thermolysis
typically Li2CO3or LiOH—the cathode precursors need to contain the transition metal in a well-mixed form—at atomic level—as provided in mixed transition metal hydroxides. Mixed hydroxides with suitable size and morphology are typically achieved by precipitation reactions with the following steps: (...
Transition metals are characterized by a partially filled d band, which is well described within the tight-binding (TB) approximation by a linear combination of atomic d orbitals. We shall illustrate the TB method (see, e.g., Callaway [1964], Pettifor [1992] and Sutton [1993]) by consid...
Notably, no transition metals are utilized in the entire route, simplifying the drug purification process. Another patented compound, opioid delta receptor agonist 7c45, could be generated in only 3 steps and 61% overall yield using our highly chemoselective transition-metal free coupling strategy as...
Transition metals, just as alkaline earth metals, and metalloids have isotopes that often fractionated as a result of chemical transformations, including redox reactions that may be biologically mediated. Thus, there is a wide interest in astrobiology for using these new isotope systems as bio...
Effect of various metals, substrate to oxidant molar ratio, temperature, and catalyst amount etc. have been studied so as to derive optimum conditions for obtaining maximum conversion. Tert-butyl hydroperoxide has been used as an oxidant in acetonitrile solvent. The oxidation products obtained are 2...