An erbium-organic polymer incorporating 2-(hydroxyl)-6-methylisonicotinic and oxalate coligand with 63 topology

A new lanthanide-organic framework incorporating both substituted isonicotinic acid and oxalate coligand has been fabricated successfully through solvo-thermal reaction, namely, {[Er(μ2-H2Minca)](μ2-C2O4 · 2H2O] · 2H2O} n (I) (H3Minca = 2-(hydroxyl)-6-methyl-isonicotinic acid, H2C2O4 = oxalate acid). Complex I exhibits two dimensional (2D) corrugated networks with a 63 topology, in which {LnO8} polyhedron units are alternately linked through carboxylate and oxalate oxygen atoms into the 2D sheet layer (CIF file CCDC no. 948026). Thermogravimetric and different thermal analysis measurements indicate that I displays high thermal stability. Complex I also shows characteristic f-f transition luminescence emission in NIR region.