Long-chain polyamides (LCPAs) are depolymerized by ammonolysis of the secondary amide bonds into building blocks for new polymer synthesis. Research on PA is quite limited and often proposes harsh reaction conditions with homogeneous catalysts. Here, we describe a heterogeneous catalytic system based Nb2O5. Reactions were performed at relatively low temperature 200 °C in cyclopentyl methyl ethe...

Rare-earth doped oxynitrides have attracted much attention as phosphors for white LEDs. A new family of Ce or Eu-doped oxynitride phosphors with the apatite structure has been studied: La8+xSr2-x(Si/Ge)6NyO26+x/2-3/2y. The ammonolysis of an apatite oxide precursor has been used as a general method of synthesis, allowing decreasing the nitriding temperature respective to the classical solid stat...

Molybdenum oxide nitride (denoted as Mo(O,N)3) was obtained by ammonolysis of α-MoO3 with gaseous ammonia. Electronic and geometric structure, reducibility, and conductivity of Mo(O,N)3 were investigated by XRD, XAS, UV-Vis spectroscopy, and impedance measurements. Catalytic performance in selective propene oxidation was determined by online mass spectrometry und gas chromatography. Upon incorp...

Phase-pure scheelite AMoO4 and AWO4 (A = Ba, Sr, Ca) were thermally treated under an ammonia atmosphere at 400 to 900 °C. SrMoO4 and SrWO4 were shown to convert into cubic perovskite SrMoO2N and SrWO1.5N1.5, at 700 °C and 900 °C respectively, and to form metastable intermediate phases (scheelite SrMoO4-xNx and SrWO4-xNx), as revealed by X-ray diffraction (XRD), elemental analysis and FTIR spect...

Cellulose-based paper samples were surface-modified by a polymeric single-source precursor prepared from perhydropolysilazane (PHPS) and iron(III)acetylacetonate (Fe(acac)3) ammonolyzed at 500°C, 700°C, 900°C, 1000°C, leading to C/SiFe(N,C)O-based ceramic papers with in situ-generated hierarchical micro/nano-morphology. As reference, cellulose-free under the same conditions. Upon thermal treatm...

In the present report, generation of Tantalum oxyfluoride and oxynitride upon ammonolysis gel obtained from modified tantalum-alkoxo complexes is reported. To best our knowledge, this first report formation tantalum thin films via β-diketone complex [Ta(OEt)4(CF3COCH2COCH3)]m. The integration nitrogen fluorine in lattice sites metal oxides leads to significant reduction bandgap, resulting their...

Ternary metal oxides (TMOs) with flexible band structures are of significant potential in the field photocatalysis. The efficient utilization renewable and green solar energy is great importance to developing photocatalysts. To date, a wide range TMOs systems has been developed as photocatalysts for water air purification, but their practical applications visible light-assisted chemical reactio...

5-(Octa-1,7-diynyl)-2'-deoxyuridine was converted into the furano-dU derivative 7 by copper-catalyzed cyclization; the pyrolodC-derivative 3 was formed upon ammonolysis. The bicyclic nucleosides 3 and 7 as well as the corresponding non-cyclic precursors 4 and 6 all containing terminal C[triple bond]C bonds were conjugated with the non-fluorescent 3-azido-7-hydroxycoumarin 5 employing the copper...