Anthryl-1,2,4-oxadiazole-Substituted Calix[4]arenes as Highly Selective Fluorescent Chemodosimeters for Fe<sup>3+</sup>
作者:Ying-Jung Chen、Shun-Chieh Yang、Chia-Chen Tsai、Kai-Chi Chang、Wen-Han Chuang、Wei-Lun Chu、Vladimir Kovalev、Wen-Sheng Chung
DOI:10.1002/asia.201403265
日期:2015.4
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
通过1,2,4-二恶唑为结合配体,以蒽为荧光团的荧光化学传感器1和2是通过依次进行25,27-二氧乙腈[4]芳烃8和11的1,3-偶极环加成反应合成的。1的荧光被Fe 3+和Cu 2+严重淬灭,而2的荧光仅被Fe 3+选择性淬灭。对照化合物4也被Fe 3+选择性淬灭。,这暗示了蒽基1,2,4,4-恶二唑核心的重要性;此外,显示出可以产生各种氧化产物,例如恶蒽酮13,蒽醌14和咪唑基恶蒽酮15。除了产物的分离和鉴定,还讨论了这些3-蒽,1,2,4-恶二唑基的Fe 3+的荧光猝灭机理。此外,应注意的是,恶二唑取代的蒽4和杯[4]芳烃2是Fe 3+选择性荧光化学计量计,不受Cu 2+的干扰。