A novel europium metal-organic framework as luminescent probe for detecting Al3+

A novel three-dimensional europium metal-organic framework (Eu-MOF), [Eu(L)(OAc)(DMA)](n), (1), has been successfully obtained based on a newly designed ligand 4'-(3,5-dicarboxyphenyl)-4,2':6',4 ''-terpyridine (H2L). The structure of 1 was established by single crystal X-ray diffraction technique, and structure analysis shows that two Eu3+ in 1 are 4-fold bridged by two eta(1):eta(1):mu(2) carboxylates from L2- and the other two eta(1):eta(1):mu(2) carboxylates from acetic add, respectively. The binuclear [Eu-2] were further linked by L2- to form a 3D framework. The investigations on luminescent properties reveal that 1 can detect Al3+ quickly with relatively high sensitivity and selectivity. More importantly, it displays high thermal and solvent stability. Additionally, a self-made fluorescence test paper fabricated based on 1 was used to detect Al3+ in practice. (C) 2016 Elsevier B.V. All rights reserved.