| Literature DB >> 17650010 |
Kai-Chi Chang1, In-Hao Su, Annamalai Senthilvelan, Wen-Sheng Chung.
Abstract
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.Entities:
Year: 2007 PMID: 17650010 DOI: 10.1021/ol071337+
Source DB: PubMed Journal: Org Lett ISSN: 1523-7052 Impact factor: 6.005