期刊
INORGANIC CHEMISTRY FRONTIERS
卷 8, 期 22, 页码 4924-4932出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi00840d
关键词
-
资金
- National Science Foundation of China [52075218, 51775232]
In this study, a new stable lanthanide-based metal-organic framework (MOF) was successfully assembled, demonstrating strong red fluorescence emission and sensitivity for pH and folic acid detection. The MOF was also used as a fluorescent material for fingerprint identification. Additionally, mixed-matrix membranes (MMMs) based on the MOF showed comparable fluorescence emission to the MOF itself and exhibited good selectivity and recyclability for folic acid sensing.
Here, we demonstrate the assembly of a new stable lanthanide-based metal-organic framework (MOF), Eu(HDPB)(phen) (1) (HDPB = (1,1 ':3 ',1 ''-terphenyl)-3,3 '',5,5 ''-tetracarboxylic acid, phen = 1,10-phenanthroline), with a three-dimensional framework under solvothermal conditions. 1 showed strong red fluorescence emission at room temperature and could be used as a selective and sensitive chemical sensor for pH and folic acid (FA) detection. Moreover, 1 could also be applied as a fluorescent material for the visible identification of fingerprints. Then, using 1 as a filler, two mixed-matrix membranes (MMMs), 1@poly(epsilon-caprolactone) (PCL) and 1@poly(vinylidene difluoride) (PVDF), have been fabricated. Notably, owing to the hydrophobic protection provided by the polymer matrix of the MOF particles, these two MMMs also exhibited fluorescence emission comparable to that of 1 and could be used for FA sensing with good selectivity and remarkable recyclability. More importantly, this is the first time that Eu-MOF-based MMMs have been employed in FA detection. The fabrication of MOF-based MMMs not only provides a facile method for sensing biomarkers, but it also enhances the recyclability of sensors.
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