Chang Kai-Chi, Su In-Hao, Senthilvelan Annamalai, Chung Wen-Sheng
Department of Applied Chemistry, National Chiao-Tung University, Hsinchu, 30050, Taiwan, Republic of China.
Org Lett. 2007 Aug 16;9(17):3363-6. doi: 10.1021/ol071337+. Epub 2007 Jul 25.
A novel fluorescent on-off switchable chemosensor 1 with two different types of cationic binding sites is synthesized, which is composed of a triazole-modified calix[4]crown in the 1,3-alternate conformation. Among 15 metal ions examined, the fluorescence of 1 was strongly quenched by Hg2+, Cu2+, Cr3+, and Pb2+; however, the revival of emission from the strongly quenched 1.Pb2+ complex was achievable by the addition of K+, Ba2+, or Zn2+ ions. Thus, metal ion exchange can trigger an on-off switchable fluorescent chemosensor.
合成了一种具有两种不同类型阳离子结合位点的新型荧光开-关可切换化学传感器1，它由处于1,3-交替构象的三唑修饰杯[4]冠组成。在所检测的15种金属离子中，1的荧光被Hg2+、Cu2+、Cr3+和Pb2+强烈猝灭；然而，通过添加K+、Ba2+或Zn2+离子，可以使被强烈猝灭的1·Pb2+配合物的发射恢复。因此，金属离子交换可以触发一种开-关可切换的荧光化学传感器。
