Exploring fluorescent covalent organic frameworks for selective sensing of Fe3+

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（11）
• 页码范围: 1470-1474
• 页数: 5页
• 语种: 英文

摘要

Covalent organic frameworks (COFs) have been widely applied in gas capture and separation,but the fluorescent property of COFs with large π-conjugated system tends to be underexplored.Here we report the fluorescent properties of several COFs including TaTa,DhaTab,TRITER-1 and TzDa and the effect of metal ions of Na+,Mg2+,K+,Ca2+,Cu2+,Zn2+,Pb2+,Ag+,Cd2+ and Fe3+ on the fluorescence of these COFs.The results show that only Fe3+ significantly quenched the fluorescence of the studied COFs.The possibility of the four COFs for selective sensing of Fe3+ was demonstrated.The possible mechanism of the effect of Fe3+ on the fluorescence of the COFs was based on the absorption competition quenching.