Organic-Inorganic Two-Dimensional Hybrid Networks Constructed from Pyridine-4-Carboxylate-Decorated Organotin-Lanthanide Heterometallic Antimotungstates.

Six organic-inorganic hybrid pyridine-4-carboxylate-decorated organotin (OT)-lanthanide (Ln) heterometallic antimotungstates [Ln(HO)(pca)]H[Sn(CH)(HO)][B-β-SbWO]·12HO [Ln = La (), Ce (), Pr (), Nd (), Sm (), Eu (); Hpca = isonicotinic acid] have been prepared with the help of the structure-directing effect of the trivacant [B-α-SbWO] segment toward [(CH)Sn] and Ln ions in an acidic water medium. The prominent architecture characteristic is that their structural units consist of a trivacant [B-β-SbWO] segment stabilized by three [Sn(CH)(HO)] groups and a [Ln(HO)(pca)] cation, which are interconnected to propagate an intriguing two-dimensional (2D) network. For all we know, - stand for the first 2D OT-Ln heterometallic polyoxometalates. Furthermore, luminescence performances of solid-state - were deeply surveyed at ambient temperature. Energy migration from [B-β-SbWO] and pca to Sm centers in was also studied. Comparative studies demonstrate that the contribution of [B-β-SbWO] sensitizing the emission of Sm is prominently larger than that of pca sensitizing the emission of Sm in the emission process of . Most interestingly, as a fluorescence probe exhibits high selectability and sensitivity for recognizing Zn and Cu in water.