Anionic metal organic framework hybrids: functionalization with lanthanide ions or cationic dyes and fluorescence sensing of small molecules
A zinc based anionic metal organic framework, [HDMA]2[Zn2(BDC)3(DMA)*6DMF (HDMA+ dimethylammonium, BDC2 1,4 benzenedicarboxilate, DMA: dimethylamine and DMF: N,N' dimethylformamide) has been solvothermally synthesized. And its cations, HDMA+ are exchanged by various lanthanides to form the hybrid systems via a post synthetic process. These lanthanide(III) loaded materials have shown different luminescent behaviors, indicating that this kind of anionic MOF could effectively sensitive lanthanides and be used as a potential luminescent probe towards different lanthanide ions. Besides, this system exhibits selective adsorption ability to cationic dyes, such as Rhodamine B, Basic Red 2 and Methylene Blue. RhB@1 has a fastest selection and realizes the probing of various organic solvent molecules as well as volatile organic benzenes (VOBs) especially for sensing acetone and aniline.