نتایج جستجو برای: semiconducting tin compounds
تعداد نتایج: 247401 فیلتر نتایج به سال:
The multilayer antimony-doped tin dioxide coating was obtained by cathodic deposition of multilayer metal-hydroxide coating with near 100-nm thickness layers on the alloy underlayer accompanied by the anodic oxidation of this coating. The potential regions of deposition of tin, antimony, tin-antimony alloy, and mixture of this metals and their hydroxides in the pyrophosphate-tartrate electrolyt...
This paper presents a discussion of fundamental problems of the speciation analytics of organometallic compounds occurring at low concentration levels in samples involving a complex matrix. It points out differences in analytical procedures for speciation analyses and those for determinations of total contents of a metal present in the studied sample in a number of different species.
Dimeric tetraalkyldistannoxanes are have been reported to catalyze esterification reactions, but are difficult to investigate in detail due to the lack of suitable spectroscopic handles. Electrospray ionization mass spectrometry (ESI-MS), in conjunction with a tethered charge on a tin atom, reveals that immediate decomposition to mono-tin carboxylate compounds occurs in the presence of carboxyl...
In the following discussion of the toxicology of the ' newer' metals, it is perhaps more accurate to refer to them as metals which have only recently become of industrial importance. Most of the metals mentioned have long been known, and in some instances have actually been used in quantity. However, many new types of use have developed, or unusual compounds have become important industrially a...
U9Sn NMR Spectroscopy of Some Iron-Tin Compounds - First Measurements of One-Bond Coupling Constants
Carbonyliron tin complexes CpFe(CO)2-S n M e3 (1), a5-(CO)4Fe(SnMe3)2 (2), cis(CO)4Fe(SnMe2Cl)2 (3), [R2SnFe(CO)4]2 (4a, R = Me; 4b, R = Bu), {Me2Sn[Fe(CO)4]2}2Sn (5), Me2Sn[Fe(CO)4]2Sn[Fe(CO)4]2 (6) and Sn[Fe(CO)4]4 (7) were studied by ll9Sn NM R. It proved possible for the first time to observe coupling constants './(119Sn57Fe) in the range of 36 to 64 Hz. The large magnitude of geminal coupl...
Profound understanding and survey of magnesium base intermetallic compounds is hindered by various difficulties in their processing and fabrication. Solid-state synthesis via the bulk mechanical alloying (BMA) is free from contaminations and segregation through high reactivity of elemental constituents against crucibles or vials. Magnesium–tin system is employed to demonstrate the solid-state r...
Bis(sulfurdiimido)tin compounds of the type R2Sn[(NSN)'Bu]2 [R = Me (2a), Et (2b)] re act with triethylborane Et^B by rearrangement and N-ethylation to give the novel aminoborane derivatives R2Sn[N('Bu)SN(Et)BEt2]2 (5a, b), in the same way as "Bu3Sn(NSN)'Bu (1) reacts with Et.̂ B to give "Bu3Sn[N('Bu)SN(Et)BEt2] (4). In contrast, 2c (R = 'Bu) and tris(sulfurdiimido)tin compounds RSn[(NSN)'Bu]3 ...
Manipulation and control of matter at the nanoand atomic level are crucial for the success of nano-scale sensors and actuators. The ability to control and synthesize multilayer composite structures using carbon nanotubes that will enable to build electronic devices within a nanotube is still in its infancy. In this paper, we present results on selective electrochemical deposition of metals and ...
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