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Cu2+- and Hg2+-Selective Chemosensing by Dioxocyclams Having Two Appended Pyrenylacetamides
- Issue Date
- May-2009
- Publisher
- KOREAN CHEMICAL SOC
- Keywords
- Dioxocyclams; Chemosensing; Pyrene; Cu2+ selectivity; Hg2+ Selectivity
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.30, no.5, pp 1093 - 1096
- Pages
- 4
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 30
- Number
- 5
- Start Page
- 1093
- End Page
- 1096
- ISSN
- 0253-2964
1229-5949
- Abstract
- Two new chemosensors 1 and 2 derived from 5,12- and 5,7-dioxocyclams were prepared and their signaling behaviors toward transition metal ions were investigated. Chemosensors 1 and 2 showed very efficient responses toward Cu2+ and Hg2+ ions. Ratiometric analysis of the fluorescence changes in pyrene monomer and excimer emissions clearly demonstrated the Cu2+- and Hg2+-selective signaling behavior. The signaling mechanism of the chemosensors is due to conformation changes upon complexation with metal ions and the inherent quenching nature of the complexed Cu2+ and Hg2+ ions themselves.
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