Rare Earth Arenedisulfonate Metal−Organic Frameworks: An Approach toward Polyhedral Diversity and Variety of Functional Compounds

• DOI: 10.1021/ic0617689
• Publication Date: 2007-04-04T12:00:28Z
• Authors: Felipe Gándara; Alberto García-Co...; Concepción Cascales; Berta Gómez-Lor; Enrique Gutiérrez...; Marta Iglesias; Angeles Monge; Natalia Snejko
• Keywords: Functional Diversity

Eight 2D and 3D metal-organic framework (MOF) rare earth naphthalenedisulfonates have been obtained. The different geometry of the naphthalenedisulfonic acids used as connectors [(1,5-NDS) (2,6-NDS)] gives rise to three new structure types. In Ln(OH)(1,5-NDS)H2O, LnPF-1 (lanthanide polymeric framework; Ln=La, Nd, Pr, Sm Eu), lanthanide ion is octacoordinated. Its formed by (Ln2O14)-S-(Ln2O14) infinite chains, connected through complete NDS connectors. LnPF-2 (Ln=Nd), with same empirical formula former, in octa- nonacoordination, owns an arrangement sulfonate bridges neodymium polyhedra that a structure. [Ln5(2,6-NDS)3(OH)9(H2O)4](H2O)2, LnPF-3 (Ln=Nd, demonstrates it possible obtain (2,6-NDS), when greater Ln/connector ratio employed. It worth pointing out existence, this latter family compounds, mu5-OH group, whose hydrogen atom very close one-sixth Ln (distance Ln...H=2.09 A). materials, high thermal stability, act active selective bifunctional heterogeneous catalysts oxidation linalool yielding cyclic hydroxy ethers. absence any Nd-Nd magnetic interaction explained due inner nature 4f orbitals Nd3+, which do not favor exchange. influence frame matrix results better photoluminescence efficiency for NdPF-1.