A multifunctional Tb-MOF luminescent probe: Synthesis, characterization and mechanism exploration

• Published in: Inorganic chemistry communications 2023-12, Vol.158, p.111679, Article 111679
• Main Authors: Yu, Zhikui, Wang, Jiaoying, Tai, Minghui, Wang, Qianwei, Wu, Qi, Guo, Jinhu, Cheng, Yinchong, Jin, Dalai, Wang, Longcheng
• Format: Article
• Language: English
• Subjects: Lanthanide metal–organic frameworks; Multifunctional responsive probe; Quenching mechanism
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2023.111679

[Display omitted] •A 3D porous lanthanide metal–organic framework: Tb(cpioa) is synthesized by a rigid tri-carboxyl ligand.•Tb(cpioa) illustrates highly selective detection of acetone, Fe3+ and Cr2O72- in water with excellent stability.•The more comprehensive quenching mechanisms are proposed and verified in details. A multifunctional lanthanide metal–organic framework: Tb(cpioa) was successfully obtained by a facile hydrothermal method. Based on the single-crystalline XRD, BET and FT-IR characterizations, it’s found that Tb(cpioa) has a porous 3D networks crystal structure. Luminescent characteristics and sensing properties of Tb(cpioa) were investigated in details. Tb(cpioa) has a specific and sensitive recognition capability of acetone, Fe3+ and Cr2O72- in water. Based on detailed characterizations and theoretical computations, the luminescence quenching mechanism is found complicated and composed of four quenching processes: the competition of UV–vis absorption, the weak interactions between ligand and analytes, and two dynamic transfer processes: the fluorescence resonance energy transfer (FRET) and the photo-induced electron transfer (PET).