Solvent- and pH-Stable Eu(III)-Based Metal-Organic Framework with Phosphate-Ratio Fluorescence Sensing and Significant Proton Conduction.

Lanthanide-based metal-organic frameworks show good potential for applications due to their unique structures and functional properties. A highly thermally and acid-base stable was synthesized by a solvothermal method with the molecular formula {[(CH)NH][Eu(NDDP)(HO)]·HO} (, HNDDP = 5,5'-(naphthalene-2,6-diyl)diisophthalic acid). takes a three-dimensional (4,4,8)-connected topology.

Stable Europium(III) Metal-Organic Framework Demonstrating High Proton Conductivity and Fluorescence Detection of Tetracyclines.

A europium(III) metal-organic framework (MOF), namely, {[[(CH)NH]Eu(DTTP-2OH)(HCOO)(HO)]·4HO} (, HDTTP-2OH = 2',5'-dihydroxy-[1,1':4',1″-terphenyl]-3,3″,5,5″-tetracarboxylic acid) has been assembled through solvothermal method. The is a three-dimensional (3D) (4,4,8)-connected topological framework with binuclear Eu(III) clusters as secondary building units, in which a richly ordered hydrogen bonding network formed among the free HO molecules, dimethylamine cations, and phenolic hydroxyl groups provides a potential pathway for proton conduction. The proton conductivity reaches the category of superionic conductors (σ > 10 S cm) at room temperature with a maximum conductivity of 1.