Synthesis and characterization of a new ternary nitride, Ca3VN3

Theoretical study on the structural, electronic and physical properties of layered alkaline-earth-group-4 transition-metal nitrides AEMN2

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] These compounds display a wide range of varying and oen unique crystal structures in which the metals -oen transition metalsexhibit unusual oxidation states and/or coordination to nitrogen. Examples include the families of the ternary phases AE 3 MN 3 (AE ¼ alkaline earth metal; M ¼ V, Cr, Mn, Fe) [15][16][17] and Ca 6 MN 5 (M ¼ Fe, Ga, Mn), 18,19 with structures unique to nitrides in which M 3+ cations are coordinated to three nitrogen atoms to form sheets of carbonate-like [MN 3 ] 6À trigonal planar units separated by AE cations. Ternary nitridometalates can also adopt structure types encountered in oxide and carbide chemistry.…”

Sr5[NbN4]N - A Nitridoniobate(V) Nitride Containing Isolated [NbN4]7- Tetrahedra and Octahedral Chains 1(Sr4Sr2/2N7+)

“…Single phase powders (orange-yellow) of Sr 5[NbN 4 ]N are obtained from Sr 2 N and niobium powder (Chempur, 99.9 %) in a molar ratio of 3:1 and nitrogen of ambient pressure in niobium crucibles (Plansee) at a temperature of 1173 K. Temperatures higher than 1223 K usually lead to increasing amounts of Sr2 [NbN 3 ] [11] andother not yet identified phases. Single crystals of Sr 5 [NbN 4 ]N with a translucent red colour are obtained together with other phases from reaction of Sr 2 N and Nb with nitrogen gas in niobium crucibles at 1223 K. Selected single crystals and aggregates were transferred by an air tight shuttle into a scanning electron microscope and examined by energy dispersive X-ray analysis (EDX, Philips XL 30; excitation voltage: 30 kV).…”

Das Hexanitridodimanganat(IV) Li6Ca2[Mn2N6]: Herstellung, Kristallstruktur und chemische Bindung

“…Eine bemerkenswerte Ausnahme bilden Kohlenstoff-Nanoröhren, bei denen durch Transmissions-Elektronenmikroskopie (TEM) kontrastreiche Abbildungen erhalten werden können, und zwar ohne Schwermetall-Beschichtung oder Anfärbung (wodurch die Auflösung deutlich verringert würde). [4] Aus diesem Grund wurden Fulleren-Derivate [5] als DNA-komplexierenden Agentien gewählt. Wir berichten hier über einen neuen und einfachen Zugang zu aus DNA/Fulleren-Hybriden aufgebauten Nanostrukturen, die unmittelbar durch TEM untersucht werden können.…”