期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 23, 期 20, 页码 4803-4809出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201604252
关键词
cadmium; diffusion processes; fluorescence; metal-organic frameworks; sensors
资金
- Korea CCS R&D Center (KCRC) - Korean government (the Ministry of Science, ICT, & Future Planning (MSIP) [NRF-2014M1A8A1049253]
- Basic Science Research Program [NRF-2015R1A2A1A10055658]
- Priority Research Centers Program [NRF2010-0020209]
- PAL
- Korea University Grant
With regard to fluorescence quenching commonly observed during metal-ion detection, turn-on chemical sensing has been rarely reported, but could be extremely important because it facilitates the selective recognition of target objects of interest against a dark background. A metal-organic framework (MOF) chemosensor has been prepared that serves as an efficient platform for the selective detection of Cu2+ and Cd2+ ions over other metal ions. In particular, this framework shows the highest fluorescence enhancement (approximate to 60-fold relative to Cd-free MOF) for the hazardous metal ion Cd2+ among luminescent MOFs and displays excellent reusability in repeated cycles. The direct diffusion of Cd2+ into the crystal pores has also been visualized for the first time.
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