Selective Adsorption of Dyes and Fe3+ Sensing via Tb3+ Incorporation in an Anionic Cadmium‐Organic Framework

• Published in: ChemPlusChem (Weinheim, Germany) Germany), 2024-09, Vol.89 (9), p.e202400192-n/a
• Main Authors: Liu, Liu, Chen, Duan, Dou, Ai‐Na, Xu, Quan‐Qing, Liu, Feng‐Yi, Zhu, Ai‐Xin, Zhu, Rong‐Rong
• Format: Article
• Language: English
• Subjects: dye adsorption and separation; Fe3+ Sensing; Metal-organic framework; Tb3+ encapsulation
• ISSN: 2192-6506; 2192-6506
• DOI: 10.1002/cplu.202400192

A three‐dimensional (3D) anionic cadmium‐organic framework, namely [(CH3)2NH2][Cd1.5(DMTDC)2] ⋅ 2DMA ⋅ 0.5H2O (Cd‐MOF; DMA=N,N‐dimethylacetamide), was successfully synthesized under solvothermal conditions by using a linear thienothiophene‐containing dicarboxylate ligand, 3,4‐dimethylthieno [2,3‐b]‐thiophene‐2,5‐dicar‐boxylic acid (H2DMTDC). Single‐crystal X‐ray diffraction analysis reveals that Cd‐MOF exhibits a 3D anionic framework with pcu α‐Po topology, featuring rectangle and rhombus‐shaped channels along b‐ and c‐ axis direction. Cd‐MOF demonstrates selective adsorption of cationic dyes over anionic and neutral dyes. Additionally, Tb3+‐loaded Cd‐MOF serves as a fast‐response fluorescence sensor for the sensitive detection of Fe3+ ions with a low limit of detection (8.90×10−7 M) through fluorescence quenching. A porous anionic metal‐organic framework (Cd‐MOF) were synthesized by using using a linear thienothiophene‐containing dicarboxylate ligand. Single crystal X‐ray analysis reveals that Cd‐MOF exhibits 3D framework with pcu topology. Cd‐MOF displays selective adsorption of cationic dyes over anionic and neutral dyes. Furthermore, it serves as a rapid‐response fluorescence sensor for Fe3+ through fluorescence quenching by the encapsulation of Tb3+.