A novel amino functionalized three-dimensional fluorescent Zn-MOF: The synthesis, structure and applications in the fluorescent sensing of organic water pollutants

Zhang, Ensheng; Wu, Lumiao; Jiang, Long; Guo, Kunkun; Su, Zhenyu; Ju, Ping

doi:10.1016/j.molstruc.2022.133314

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…Aprotic solvents such as DMF, octane, and acetone did not induce emission from the films, whereas protic solvents did induce emission; the most intense emission was observed from polar protic solvents such as water (Figure S7). Enhanced luminescence in water has been reported for other coordination polymers utilizing 2-ATA as the linker, and this emission increase has been attributed to hydrogen bonding between water and the linker , and/or protonation of the amino group. , Indeed, 2-ATA is known to exhibit a solvent polarity-dependent intermolecular charge transfer state that arises between the carboxylic acid groups and the amino group, and this state is stabilized and enhanced by hydrogen bonding with water . In order to further probe the impact of the solvent on the Cu-2-ATA thin film emission properties, the film was exposed to different ratios of DMF:water.…”

Section: Resultsmentioning

confidence: 99%

Efficient and Rapid Synthesis of a Solvent and Ion-Responsive Luminescent Copper 2-Aminoterephthalate Thin Film

Crawford

Kim

Diemler

et al. 2023

ACS Appl. Opt. Mater.

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Metal–organic coordination polymers are promising optical sensing materials due to their tunable physical and chemical properties, which can be controlled through careful selection of metal centers, organic linkers, and/or reaction conditions. The fabrication of coordination polymers in thin film form is particularly desirable for sensor development because it facilitates integration with sensing platforms such as optical fibers, enables sensing material recovery and regeneration, and can enhance analyte uptake during analysis. However, many thin film fabrication techniques are tedious and require high temperatures and/or expensive equipment, creating a significant barrier toward scalable production. Here, coordination polymer thin films comprised of copper and 2-aminoterepthalic acid are selectively grown within 30 min at room temperature and under ambient atmosphere using an aluminum-doped zinc oxide template, circumventing the long time and high equipment costs typically associated with thin film production. The films luminesce in the presence of polar protic solvents and exhibit enhanced emission in the presence of aluminum(III) ions, an economically critical metal according to the 2022 United States Geological Survey. The “turn on” luminescent response to aluminum is selective against 15 other metal ions commonly found in environmental streams, and is highly sensitive, with estimated detection limits down to 120 parts-per-billion in water. As a proof-of-concept, the films were evaluated on diluted fly ash streams, with luminescent signals that qualitatively correlate with inductively coupled plasma mass-spectrometry analysis. Taken together, this work presents a promising route toward the scalable production of optically active coordination polymer films.

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