✦ LIBER ✦
A new fluorescent chemosensor for transition metal cations and on/off molecular switch controlled by pH
✍ Scribed by Yu-Dong Cao; Qi-Yu Zheng; Chuan-Feng Chen; Zhi-Tang Huang
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- French
- Weight
- 179 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
A new fluorescent chemosensor with imidazole as ionophore was synthesized by the selective derivation of calixarene, which can effectively recognize Cu 2+ and Zn 2+ leading to different fluoroscopic behaviors in CH 3 OH-H 2 O. This system could be considered as a molecular switch. By modulating the pH of the solution, on-off-on fluorescent switching is carried out upon combinatory addition of acid, base and Cu 2+ .