苝
全氟辛酸
二亚胺
材料科学
荧光
金属
金属有机骨架
转身(生物化学)
光化学
纳米技术
环境化学
有机化学
吸附
化学
冶金
生物化学
物理
量子力学
作者
Rana Dalapati,Matthew C. Hunter,Mostakim Sk,Xiaomei Yang,Ling Zang
标识
DOI:10.1021/acsami.4c03389
摘要
A novel, water-stable, perylene diimide (PDI) based metal–organic framework (MOF), namely, U-1, has been synthesized for selective and sensitive detection of perfluorooctanoic acid (PFOA) in mixed aqueous solutions. The MOF shows highly selective fluorescence turn-on detection via the formation of a PFOA-MOF complex. This PFOA-MOF complex formation was confirmed by various spectroscopic techniques. The detection limit of the MOF for PFOA was found to be 1.68 μM in an aqueous suspension. Upon coating onto cellulose paper, the MOF demonstrated a significantly lower detection limit, down to 3.1 nM, which is mainly due to the concentrative effect of solid phase extraction (SPE). This detection limit is lower than the fluorescence sensors based on MOFs previously reported for PFAS detection. The MOF sensor is regenerable and capable of detecting PFOA in drinking and tap water samples. The PDI-MOF-based sensor reported herein represents a novel approach, relying on fluorescence turn-on response, that has not yet been thoroughly investigated for detecting per- and polyfluoroalkyl substances (PFAS) until now.
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