An erbium-organic polymer incorporating 2-(hydroxyl)-6-methylisonicotinic and oxalate coligand with 6(3) topology

摘要

A new lanthanide-organic framework incorporating both substituted isonicotinic acid and oxalate coligand has been fabricated successfully through solvo-thermal reaction, namely, {[Er(mu(2)-H(2)Minca)](mu(2)-C2O4 center dot 2H(2)O] center dot 2H(2)O} (n) (I) (H(3)Minca = 2-(hydroxyl)-6-methyl-isonicotinic acid, H2C2O4 = oxalate acid). Complex I exhibits two dimensional (2D) corrugated networks with a 6(3) topology, in which {LnO(8)} 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.