Journal
BIOSENSORS & BIOELECTRONICS
Volume 87, Issue -, Pages 236-241Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2016.08.052
Keywords
MOF nanoparticles; Charge-transfer; Terbium; Fluorescence; pH sensor
Categories
Funding
- Natural Science Foundation of China (NSFC) [21575023]
- Natural Science Foundation of Jiangsu Province [BK20161414]
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Newly emerged metal organic frameworks (MOFs) have aroused the great interest in designing functional materials by means of its flexible structure and component. In this study, we used lanthanide Tb3+ ions and small molecular ligands to design and assemble a kind of pH-sensitive MOF nanoparticle based on intramolecular-charge-transfer effect. This kind of made-to-order MOF nanoparticle for H+ is highly specific and sensitive and could be used to fluorescently indicate pH value of strong acidic solution via preset mechanism through luminescence of Tb3+. The long luminescence lifetime of Tb3+ allows eliminating concomitant non-specific fluorescence by time-revised fluorescence techniques, processing an advantage in sensing H+ in biological media with strong autofluorescence. Our method showed a great potential of MOF structures in designing and constructing sensitive sensing materials for specific analytes directly via the assembly of functional ionsiligands. (C) 2016 Elsevier B.V. All rights reserved.
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