Structural diversity, luminescent and magnetic properties of Tb(III)/Gd(III) metal–organic frameworks constructed by Tris(p-carboxyphenyl)phosphane oxide.

Abstract Two lanthanide metal-organic frameworks (LOFs), namely, {[Tb(L3−) (H 2 O)]·3CH 3 CN} n (1) and {(Me 2 NH 2 +) 0.5 ·[Gd(L3−)(HCOO−) 0.5 H 2 O]·DMF·4EtOH·H 2 O} n (2) have been constructed by tris(4-carboxyphenyl)phosphane oxide (H 3 L) under solvothermal conditions. Structural analyses indicate that complex 1 appears a 3D 6-connected {412∙63} net based on the binuclear {Tb 2 (COO) 2 } clusters. Complex 2 is also a 3D framework. Furthermore, the photoluminescence of 1 in the solid state and different solvent emulsions were studied, the results indicate that 1 shows characteristic green emission of Tb3+ ion and has better fluorescent recognition for sorts of organic solvent molecules and Fe3+ ion. Finally, the result of the variable-temperature magnetic susceptibilities suggests that complex 2 have antiferromagnetic behavior between Gd(III) ions. Graphical abstract Based on the tripodal tris(p -carboxyphenyl)phosphane oxide ligand, two lanthanide metal–organic frameworks were obtained with highly sensitive sensing of complex 1 for nitrobenzene derivatives and Fe3+ ion, and magnetic properties of 2. Unlabelled Image Highlights • Two new metal-organic frameworks were synthesized and characterized. • Complex 1 can detect nitrobenzene derivatives and Fe3+ ion. • Complex 2 have antiferromagnetic behavior between Gd(III) ions. [ABSTRACT FROM AUTHOR]