Luminescent Metal-Organic Framework Sensor: Exceptional Cd2+ Turn-On Detection and First In Situ Visualization of Cd2+ Ion Diffusion into a Crystal
- Authors
- Lim, Kwang Soo; Jeong, So Yeon; Kang, Dong Won; Song, Jeong Hwa; Jo, Hyuna; Lee, Woo Ram; Phang, Won Ju; Moon, Dohyun; Hong, Chang Seop
- Issue Date
- 6-4월-2017
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- cadmium; diffusion processes; fluorescence; metal-organic frameworks; sensors
- Citation
- CHEMISTRY-A EUROPEAN JOURNAL, v.23, no.20, pp.4803 - 4809
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY-A EUROPEAN JOURNAL
- Volume
- 23
- Number
- 20
- Start Page
- 4803
- End Page
- 4809
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83771
- DOI
- 10.1002/chem.201604252
- ISSN
- 0947-6539
- Abstract
- 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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