Multistimuli-responsive pyrene-based lanthanide (III)-MOF construction and applied as dual-function fluorescent chemosensors for trace water and vitamins molecules. (January 2023)

• Record Type: Journal Article
• Authors: Huo, R.; Wang, C.; Xu, F.; Xing, Y.-H.; Wang, Y.-F.; Bai, F.-Y.
• Is Part Of: Materials today chemistry. Volume 27(2023)
• Publication Date: 2023-01
• Subjects: Ln-MOF -- Pyrene polycarboxylate -- Vitamin molecule -- Fluorescence sensing -- Molecular structure; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2022.101292
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Three novel isostructural 3D porous metal–organic frameworks (3D MOFs) Ln-TBAPy (Ln = Sm (1), La (2), and Nd (3); H4 TBAPy = 1, 3, 6, 8-tetrakis (p-benzoic acid)pyrene) were synthesized, encompassing a π-conjugated organic ligand with a pyrene functionality. In particular, the crystal structure of [Sm3 (TBAPy)2 ((μ2 -H2 O)2 (OH)2 ]∙(guests) (complex 1 ) was determined by X-ray single-crystal diffraction and displayed excellent performance in luminescent, which featured the alb topology and remarkable multiple pores dimensions. The complex 1 was utilized to determine the pH-dependent and temperature-dependent fluorescence under multistimuli responses, which exhibits its unusual photophysical characteristics and outstanding stability under special conditions. Markedly, the complex 1 probe achieves ultra-sensitive turn-on detection of trace water in organic solvent dioxane, exhibiting an ultra-low detection limit of 0.005% (v/v). In addition, we have explored that it has excellent fluorescence detection selective effect on various biological small molecule vitamins. On the one hand, the complex 1 can sense Vit-B6 with unique fluorescent switch 'turn-on-off' behavior, based on the changing concentration of Vit-B6 in MOF channel and hydrogen bond between host–guest interaction. On the other hand, complex 1 has high sensitivity to the quenching of Vit-B9 and Vit-K3, with the LOD as low as 0.32 μM, and 3.94 μM, respectively. Our synthesis strategy of Ln-TBAPy MOF materials will play simultaneously multiple roles and open up an effective avenue to dual-function fluorescence sensor of water and biological small molecule vitamins. Graphical abstract: The 3D Ln-MOFs based on ligand H4TBAPy have been designed and synthesized. In particular, complex 1 (Sm-TBAPy) exhibits turn-off fluorescent response toward Vit-B6, Vit-B9, and Vit-K3 . In addition, complex 1 (Sm-TBAy) probe can efficiently sense the trace water in the organic solvents dioxane, DMA, and DMF through the turn-on fluorescence sensing response. Image 1 Highlights: Synthesis of the 3D Ln-MOF based on ligand H4 TBAPy. The Sm-TBAPy probe can sense the trace water by fluorescence turn-on. Sm-TBAPy sensor can sense vitamins molecules by turn-off fluorescent response.