Discipline: Chemistry and Chemical Sciences
Subcategory: Chemistry (not Biochemistry)
Room: Exhibit Hall A
Dawanya Burgess - Claflin University
Co-Author(s): Hongxia Zhang, Claflin University, Orangeburg, SC; Jie Ling, Claflin University, Orangeburg, SC
Hydrothermal reactions of MoO3, TeO2 and KCl in acidic conditions resulted two new molybdenum tellurites, MoTeO5 (1) and MoTe2O7 (2). Within the structures of these two compounds, all Mo(VI) atoms adopt distorted MoO6 octahedral in a 2+2+2 mode with two short, two normal, and two long Mo-O bonds, while Te(IV) atoms are observed to be coordinated by three and five oxygen atoms and result TeO3 tetrahedral and TeO5 square pyramid polyhedra with Te-O bond distance cut off at 2.45 Å. In compound 1, two MoO6 octahedral are joined together by sharing an edge to form a Mo2O10 dimer and these dimers are further connected by corner-sharing two TeO3 polyhedral and result a neutral MoTeO5 one-dimensional chain structure. Compound 2 also exhibits a one-dimensional chain structure but in a more complicated way. Four crystallographic Te atoms adopt two difference coordination geometry, TeO3 trigonal pyramid and TeO5 square pyramid polyhedral, and them are joined together by corner-sharing and results a [Te4O10] 4- chain. The negative charge of Te chain is balanced by incorporating Mo6+ as MoO6 polyhedra which are connected to edge-sharing one TeO5, corner-sharing other two TeO5 and two TeO3 polyhdedra. Crystallographic data: compound 1, monoclinic, space group P2(1)/c, a = 4.7106(3) Å, b = 13.5827(11) Å, c = 6.0962(5) Å, β = 93.898(3)°, V = 389.15(5) Å3 , Z = 4; compound 2, orthorhombic, space group Pna2(1), a = 17.5632(5) Å, b = 4.9107(2) Å, c = 12.9518(4) Å, V = 1117.06(7) Å 3, Z = 8.
Funder Acknowledgement(s): NSF EPSCoR GEAR CRP
Faculty Advisor: Dr. Jie Ling, firstname.lastname@example.org