A Lanthanide Luminescent Cation Exchange Material Derived from a Flexible Tricarboxylic Acid 2,6-Bis(1,2,3-triazol-4-yl)pyridine (btp) Tecton

• Published in: Inorganic chemistry Vol. 57; no. 7; pp. 3920 - 3930
• Main Authors: McCarney, Eoin P, Hawes, Chris S, Kitchen, Jonathan A, Byrne, Kevin, Schmitt, Wolfgang, Gunnlaugsson, Thorfinnur
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 02.04.2018
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.8b00080

The synthesis of the three-dimensional metal–organic framework material, [Zn7 L 6]·(H2NMe2)4·(H2O)45 (1), derived from a flexible tricarboxylic acid 2,6-bis­(1,2,3-triazol-4-yl)­pyridine (btp) ligand, is presented. The btp ligand, H 3 L, adopts a three-dimensional hydrogen bonding network in the crystalline state through a combination of carboxylic acid dimer and syn–anti-btp/carboxylic acid hydrogen bonding synthons. The Zn­(II) species 1 exhibits a three-dimensional framework structure with the rare crs topology and contains linear and undulated solvent channels extending in three dimensions. The guest exchange and gas adsorption properties of 1 were investigated; herein we demonstrate the exchange of dimethylammonium cations from the as-synthesized material with cationic guest molecules in the form of dyes and luminescent Ln­(III) ions. Sensitization of Eu­(III) and Tb­(III) inside the porous network of 1 was achieved upon cation exchange, with a view toward developing functional luminescent materials.