科研之友
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摘要
In the present work, a novel 5-methyl-thiophene-carbaldehyde-functionalized rhodamine 6G Schiff base (RA) was designed and easily prepared as an Al3+ fluorescent and colorimetric probe, which could selectively and sensitively detect Al3+ by showing enhanced fluorescence emission. Meanwhile distinct color variation from colorless to pink also provided naked eye' detection of Al3+, due to the ring spirolactam opening of the rhodamine derivative. Other metal ions (including K+, Mg2+, Na+, Ba2+, Mn2+, Cd2+, Fe2+, Ni2+, Pb2+, Zn2+, Hg2+, Co2+, Li+, Sr2+ and Cu2+) could only induce limited interference. The detection limit of the fluorescent probe was estimated to be 4.17x10(-6) M, the binding constant of the RA-Al3+ complex was 1.4x10(6)M(-1). Moreover, this fluorescent probe RA possessed high reversibility. As aluminum is a ubiquitous metal in nature and plays vital roles in many biological processes, this chemosensor could be explored for biological study applications.
- 出版日期2016-5
- 单位中国海洋大学
