title: Insertion of Trivalent Lanthanides into Uranyl Vanadate Layers and Frameworks.
abstract: Two new uranyl vanadates have been prepared from hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction. The structure of (H3O)UO2VO4 (UVO-1) consists of anionic layers containing UO2(2+) pentagonal bipyramids coordinated by edge-sharing VO5 square pyramids, with the charge balanced by interlaminar H3O(+) cations. Vanadium in (UO2)3(VO4)2(H2O)3 (UVO-2) exists as monomeric VO4 tetrahedra coordinating to UO2(2+) pentagonal bipyramids, forming a 3D uranyl(VI) vanadate framework. Similar reactions with the addition of Ln(NO3)3 (Ln = Nd, Eu) afford the three heterobimetallic lanthanide uranyl vanadate frameworks Nd(UO2)3(VO4)3(H2O)11 (NdUVO-1), Eu(UO2)3(VO4)3(H2O)10 (EuUVO-1), and Eu2(UO2)12(VO4)10(H2O)24 (EuUVO-2). In NdUVO-1 and EuUVO-1, Ln(3+) cations are inserted into the interlayer space of UVO-1 substituting for H3O(+) and further bridging adjacent layers into 3D frameworks. Similarly, EuUVO-2 adopts the same sheet topology as UVO-2, with Eu(3+) ions replacing some of the interlayer uranyl ions in UVO-2. Our work has demonstrated that uranyl vanadate extended structures are excellent hosts for further incorporation of trivalent lanthanide/actinide cations and has provided a new way to create new heterobimetallic 4f-5f and 5f-5f compounds.
authors: Yaxing
authors: Y
authors: Wang
authors: Xuemiao
authors: X
authors: Yin
authors: Yanyan
authors: Y
authors: Zhao
authors: Yang
authors: Y
authors: Gao
authors: Lanhua
authors: L
authors: Chen
authors: Zhiyong
authors: Z
authors: Liu
authors: Daopeng
authors: D
authors: Sheng
authors: Juan
authors: J
authors: Diwu
authors: Zhifang
authors: Z
authors: Chai
authors: Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States.
authors: Thomas E
authors: TE
authors: Albrecht-Schmitt
authors: Shuao
authors: S
authors: Wang
mesh_terms: D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008958:Models, Molecular; D010316:Particle Size; D013052:Spectrometry, X-Ray Emission; D017974:Uranium Compounds / Q000737:chemistry*; D014638:Vanadates / Q000737:chemistry*
chemical_list: D028581:Lanthanoid Series Elements; D017974:Uranium Compounds; D014638:Vanadates