期刊
CHINESE JOURNAL OF CHEMISTRY
卷 31, 期 4, 页码 515-519出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.201300019
关键词
chemosensor; fluorescence quenching; Fe3+; aqueous media
资金
- National Natural Science Foundation of China (NSFC) [21064006, 21161018]
- Natural Science Foundation of Gansu Province [1010RJZA018]
- Program for Changjian Scholars and Innovative Research Team in University of Minisry of Education of China [IRT1177]
2,2-Bisbenzimidazole derivative (L) was designed as a fluorescent chemosensor for Fe3+. This structurally simple chemosensor displays significant fluorescence quenching with increasing concentrations of Fe3+. L exhibited high selectivity and antidisturbance for Fe3+ among environmentally relevant metal ions in aqueous media. The method of Job's plot indicated the formation of 1:2 complex between L and Fe3+, and the possible binding mode of the system was also proposed. In addition, further study demonstrates the detection limit on fluorescence response of the sensor to Fe3+ is down to 107 mol center dot L1 range. The binding mode was investigated by fluorescence spectra, ESI-MS, IR data, 1H NMR, 13C NMR and crystal data.
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