Rouschmeyer Paul, Guillou Nathalie, Serre Christian, Clavier Gilles, Martineau Charlotte, Audebert Pierre, Elkaïm Erik, Allain Clémence, Devic Thomas
Institut Lavoisier, UMR 8180 CNRS-U. Versailles St. Quentin, Université Paris-Saclay , 45 avenue des Etats-Unis, 78035 Versailles, France.
PPSM, UMR 8531 CNRS-ENS Cachan, Université Paris-Saclay , 61 avenue du président Wilson, 94235 Cachan, France.
Inorg Chem. 2017 Jul 17;56(14):8423-8429. doi: 10.1021/acs.inorgchem.7b01103. Epub 2017 Jul 3.
A novel Zr(IV) dicarboxylate metal organic framework (MOF) built up from an s-tetrazine derived ligand was prepared. This solid, which exhibits a diamond type network, combines a good stability in water, a structural flexibility, and fluorescence properties thanks to the organic ligand. It is noteworthy that this fluorescence is quenched when exposed to electron-rich molecules in solution, such as amines or phenol, this phenomenon being associated with the adsorption of the quencher, as unambiguously proven by X-ray diffraction (XRD) analysis. Finally, the quenching efficiency is shown to be governed not only by electronic and steric factors but also by the relative polarity of the solvent, the MOF, and the quencher. This work thus suggests that it is possible to develop new MOF-based sensors presenting in a given medium (such as water) highly selective responses.
制备了一种由基于均四嗪的配体构建的新型Zr(IV)二羧酸金属有机框架（MOF）。这种呈现金刚石型网络的固体，由于有机配体，在水中具有良好的稳定性、结构灵活性和荧光特性。值得注意的是，当暴露于溶液中的富电子分子（如胺或苯酚）时，这种荧光会猝灭，X射线衍射（XRD）分析明确证明，这种现象与猝灭剂的吸附有关。最后表明，猝灭效率不仅受电子和空间因素控制，还受溶剂、MOF和猝灭剂的相对极性影响。因此，这项工作表明，有可能开发出在给定介质（如水）中具有高选择性响应的新型基于MOF的传感器。
