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Molecular tectonics: on the formation of 1-D silver coordination networks by thiacalixarenes bearing nitrile groups.
Two new p-tert-butylthiacalix[4]arene derivatives 2 and 3 decorated at the lower rim with four nitrile groups have been prepared and structurally characterised in the crystalline phase. The twoExpand
Molecular tectonics: 3-D organisation of decanuclear silver nanoclusters.
The combination of silver nitrate with a thiacalix[4]arene derivative bearing at the lower rim four benzonitrile groups leads in the crystalline phase to the formation of a 3-D coordination networkExpand
Synthesis and complexation properties of carbonyl-containing thiacalix[4]arenes
Stereoisomers of thiacalix[4]arenes unsubstituted at the upper rim and containing four carbonyl fragments have been synthesized for the first time. Their structures were studied by 1D and 2D NMRExpand
Specific Features of Content and Mobility of Heavy Metals in Soils of Floodplain of the Don River
The gross heavy metal contents were studied in the main soil types of the floodplain of the estua-rine segment of the Don River. The ratio of elements strongly bound to soil components to those thatExpand
Current State of Haplic Chernozems in Specially Protected Natural Areas of the Steppe Zone
The Botanical Garden, which is located in the center of a megalopolis (Rostov-on-Don, Russia), has higher contents of lead in the upper horizon of Haplic Chernozem than other soils on the plots considered. Expand
Protective coatings for niobium alloys and their properties
Niobium alloys cannot be used at high temperatures without protective coatings. Superficial alloying of niobium alloys with only one element (aluminum, silicon or chromium) does not make it possibleExpand
Abstract : An examination was made of almost all the proposed electrolytes for the separation of the intermetalide and carbon phases in the alloys Ni-Cr-Ti-Al, and the best of them are pointed out.Expand
Nitriding of steel parts for machine construction in an endothermic atmosphere
ConclusionTo ensure the required characteristics of the diffusion layer in heat-resistant steels, it is recommended to subject them to two-stage nitriding: saturation at 950°C for 2 h in endogas withExpand