نتایج جستجو برای: niobium compounds
تعداد نتایج: 229674 فیلتر نتایج به سال:
NiTi-based shape memory alloys and the Ti2AlNb alloy have gained increasing importance in aerospace field. The joining of these two materials can further increment usage relevant engineering expand their potential applications. However, when to Ti-based alloys, formation brittle Ti-rich intermetallic compounds often occurs, significantly limiting functionality use. Dissimilar joints between a N...
Highly ordered N-doped mesoporous niobium oxide (NMNb) was prepared via a facile solid state reaction method using urea as a nitrogen source. The mesoporous structure of niobium oxide (MNb) is beneficial to the N dopant that is effectively incorporated into the lattice of MNb, resulting in a significantly enhanced visible light response. The hydrogen generation efficiency over the optimized N-d...
We report here on the controlled synthesis, characterization, and electrochemical properties of different polymorphs of niobium pentoxide grown by CVD of new single-source precursors. Nb2O5 films deposited at different temperatures showed systematic phase evolution from low-temperature tetragonal (TT-Nb2O5, T-Nb2O5) to high temperature monoclinic modifications (H-Nb2O5). Optimization of the pre...
The synthesis, structure, and spectroscopic features of a bimetallic cyanogen complex obtained from the reductive coupling of cyanide by a niobium(IV) precursor are described, and a mechanism for the coupling reaction is proposed based on DFT calculations.
The first structurally characterized niobium(v) complex possessing a terminal methylidene ligand is reported in high yield from the reaction of [(Ar'O)2Nb(CH3)2Cl] (Ar' = (2,6-CHPh2)2-4-tBu-C6H2) and two equivalents of H2CPPh3.
The niobium complex [NbCpCl4] (Cp @g-C5H4(SiCl2Me)) (1) with a functionalized (dichloromethylsilyl)cyclopentadienyl ligand was isolated by the reaction of [NbCl5] with C5H4(SiCl2Me)(SiMe3). Complex 1 was a precursor for the imido silylamido derivative [NbCpCl2(NtBu)] (Cp @g-C5H4[SiClMe(NHtBu)]) (2) after addition of LiNHtBu, which subsequently gave the dichlorosilyl compound [NbCpCl2(NtBu)] (3)...
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