Molecules 2021 Mar 9;26(5). Epub 2021 Mar 9.
Organisch-Chemisches Institut der Universität Heidelberg Lehrstuhl für Organische Chemie III 6 Im Neuenheimer Feld 270, Heidelberg University, D-69120 Heidelberg, Germany.
Interactions between well-mixed fine powders of AsO, PO, MoO, WO and NbO at different stoichiometry in quartz ampoules under vacuum at ~1000 °C in the presence of metallic molybdenum (or niobium), over several weeks, led to shiny dichroic crystalline materials being formed in cooler parts of the reaction vessel. An addition of small quantities of metals-Mo or Nb-was made with the aim of partially reducing their highly oxidized Mo(VI), W(VI) or Nb(V) species to corresponding Mo(V), W(V) and Nb(IV) centers, in order to form mixed valence solids. Sublimed crystals of four new compounds were investigated using a variety of techniques, with prime emphasis on the X-ray analysis, followed by spectroscopy (diffusion reflectance, IR, Raman and EPR), second harmonic generation (SHG), thermal analysis under N and air atmosphere, and single crystals electrical conductivity studies. Read More