标题: Anthryl-1,2,4-oxadiazole-Substituted Calix[4]arenes as Highly Selective Fluorescent Chemodosimeters for Fe3+
作者: Chen, Ying-Jung
Yang, Shun-Chieh
Tsai, Chia-Chen
Chang, Kai-Chi
Chuang, Wen-Han
Chu, Wei-Lun
Kovalev, Vladimir
Chung, Wen-Sheng
应用化学系
Department of Applied Chemistry
关键字: calixarenes;cycloaddition;fluorescence;iron;sensors
公开日期: 1-四月-2015
摘要: Fluorescent chemosensors 1 and 2, with 1,2,4-oxadiazoles as the binding ligands and anthracene as the fluorophore, were synthesized through sequential 1,3-dipolar cycloaddition reactions of 25,27-dioxyacetonitrilecalix[4]arenes 8 and 11. The fluorescence of 1 was severely quenched by both Fe3+ and Cu2+, whereas that of 2 was selectively quenched only by Fe3+. Control compound 4 was also selectively quenched by Fe3+, which implied the importance of anthryl-1,2,4-oxadiazole core; furthermore, it was shown to give various oxidation products such as oxanthrone 13, anthraquinone 14, and imidazolyl oxanthrone 15. In addition to product separation and identification, the fluorescent quenching mechanism of these 9-anthryl-1,2,4-oxadiazolyl derivatives by Fe3+ is also discussed. Furthermore, it should be noted that the oxadiazole-substituted anthracene 4 and calix[4]arene 2 are Fe3+-selective fluorescent chemodosimeters without the interference by Cu2+.
URI: http://dx.doi.org/10.1002/asia.201403265
http://hdl.handle.net/11536/124470
ISSN: 1861-4728
DOI: 10.1002/asia.201403265
期刊: CHEMISTRY-AN ASIAN JOURNAL
Volume: 10
起始页: 1025
结束页: 1034
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