School of Chemistry, University of Southampton, Highfield Campus, Southampton, Hampshire SO17 1BJ, UK.
Dalton Trans. 2009 Dec 14(46):10330-7. doi: 10.1039/b912262a. Epub 2009 Oct 15.
Five new cerium (IV) fluoride and fluoride-arsenate framework structures have been synthesised hydrothermally using CeF(4) as a fluoride source. Cs[Ce(2)F(8)[F.H(2)O]] (I) consists of layers, formed from linked Ce(F,O)(n) polyhedra cross-linked by hydrogen bonding that defines large channels containing the caesium ions. [(NH(4))(5)(H(2)O)(2)][Ce(4)(AsO(4))(6)(H(2)O)F(3)] (II), has an open framework structure with large channels filled with NH(4)(+) cations and H(2)O molecules. Ce[AsO(4)]F (III) and Ce[AsO(4)]F[H(2)O] (IV) exhibit two types of bridging (Ce-O-Ce and Ce-F-Ce) bonds between Ce(O,F)(n) polyhedra, and (NH(4))[CeF(2)(AsO(4))] (V), is isostructural with the previously reported fluoride-phosphate (NH(4))[Ce(IV)F(2)(PO(4))] (R. B. Yu, D. Wang, T. Takei, N. Kumada, H. Koizumi and N. Kinomura, J. Solid State Chem., 2001, 157, 180).
五种新型的铈（IV）氟化物和氟砷酸盐框架结构已经通过水热法使用 CeF(4) 作为氟源合成。Cs[Ce(2)F(8)[F.H(2)O]]（I）由层组成，这些层由链接的 Ce(F,O)(n) 多面体通过氢键交联而成，这些氢键定义了包含铯离子的大通道。[(NH(4))(5)(H(2)O)(2)][Ce(4)(AsO(4))(6)(H(2)O)F(3)]（II）具有开放的框架结构，大通道中填充有 NH(4)(+) 阳离子和 H(2)O 分子。Ce[AsO(4)]F（III）和 Ce[AsO(4)]F[H(2)O]（IV）在 Ce(O,F)(n) 多面体之间表现出两种类型的桥接（Ce-O-Ce 和 Ce-F-Ce）键，而(NH(4))[CeF(2)(AsO(4))]（V）与先前报道的氟磷酸盐（NH(4))[Ce(IV)F(2)(PO(4))]（R. B. Yu、D. Wang、T. Takei、N. Kumada、H. Koizumi 和 N. Kinomura，J. Solid State Chem.，2001，157，180）同构。
