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(μ_2-H_2Minca)](μ_2-C_2O_4 ??2H_2O] ? 2H_2O}_n (I) (H_3Minca = 2-(hydroxyl)-6-methyl-isonicotinic acid, H_2C_2O_4 = 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 1 displays high thermal stability. Complex I also shows characteristic f-ftransition luminescence emission in NIR region.