NDLI: Fabrication of a dual-emitting dye-encapsulated metal-organic framework as a stable fluorescent sensor for metal ion detection.

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Fabrication of a dual-emitting dye-encapsulated metal-organic framework as a stable fluorescent sensor for metal ion detection.

Content Provider	Semantic Scholar
Author	Zhang, Ningzi Zhang, Diwei Zhao, Jing Xia, Zhiguo
Copyright Year	2019
Abstract	Dye-loaded metal organic frameworks (MOFs) are regarded as one of the most fascinating luminescent materials for selective chemical sensing. Herein, a facile two-step synthesis procedure is reported for the successful encapsulation of fluorescein dye into porous zinc-adenine metal-organic framework (bio-MOF-1) crystals, and thus the aggregation-caused quenching of dye molecules can be eliminated in the confined MOF structure to further create dual emission centers. The as-prepared solid state fluorescein@bio-MOF-1 composite exhibits both the characteristic emissions of the fluorescein dye and bio-MOF-1, and host-guest energy transfer also occurs. Particularly, depending on the variety of the luminescence intensities of different metal ions incorporated in fluorescein@bio-MOF-1, such a host-guest system could be used for high-sensitive sensing of metal cations, especially for the drastic luminescence quenching of Fe3+ ions. The quenching effect coefficient (Ksv) for every metal ion detected is calculated, and the largest Ksv value for Fe3+ ions is determined to be 5072 M-1. Such an encapsulation strategy can be widely adopted to design new dye@MOF composites with multiple luminescent centers for metal cation sensing.
Starting Page	6794
Ending Page	6799
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1039/c9dt01125k
PubMed reference number	31041968
Journal	Medline
Volume Number	48
Issue Number	20
Alternate Webpage(s)	http://www.rsc.org/suppdata/c9/dt/c9dt01125k/c9dt01125k1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c9dt01125k
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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