Assembly of Two Mesoporous Anionic Metal-Organic Frameworks for Fluorescent Sensing of Metal Ions and Organic Dyes Separation

• Published in: Inorganic chemistry Vol. 60; no. 1; pp. 167 - 174
• Main Authors: Luo, Yu-Hui, Xie, A-Di, Hu, Ming-Gai, Wu, Ji, Zhang, Dong-En, Lan, Ya-Qian
• Format: Journal Article
• Language: English
• Published: United States 04.01.2021
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.0c02760

Anionic metal-organic frameworks (MOFs) have attracted increasing attention due to the enhanced electrostatic interactions between their anionic frameworks and counter-ionic guests. Owing to these special host-guest interactions, anionic MOFs are beginning to have a large impact in the field of absorption and separation of ionic molecules and selective sensing of metal ions. Herein, two mesoporous anionic metal-organic frameworks, namely, [(CH ) NH ] [In (OX) (TCA) ]·solvents ( ) and [(CH ) NH ] [In (OX) (TCPA) ]·solvents ( ) (H TCA = tricarboxytriphenylamine; H TCPA = tris((4-carboxyl)phenylduryl)amine; OX = oxalate), have been synthesized by using wheel-type [In (OX) (COO) ] as building blocks. Structural analyses show that and show isoreticular three-dimensional frameworks with topology. Due to their anionic frameworks and tunable pore window sizes, both compounds can be exploited for absorbing and separating cationic organic dyes. In addition, can be developed as a fluorescence "turn-off" sensor for selectively sensing Fe , whereas can be used for fluorescence "turn-on" sensing of Cu and Co ions.