期刊
ADVANCED SCIENCE
卷 3, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/advs.201600146
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB834805]
- National Science Fund for Distinguished Young Scholars of China [51125013]
- Innovative Research Group of Hubei Province [2015CFA014]
- Natural Science Foundation of Hubei Province [2015CFB332]
- China Postdoctoral Science Foundation [2015M582262]
- Fundamental Research Funds for the Central Universities of China
A tetraphenylethene (TPE) group that exhibits aggregation-induced emission is incorporated into the ligand of a Eu(III) complex (TPEEu) to sensitize the excited state of Eu(III). In steady-state measurements, TPEEu exhibits weak luminescence when dissolved in aqueous solutions even at a high concentration level, but emits strong fluorescence of TPE and phosphorescence of Eu(III) upon binding with bovine serum albumin. With a delay time of 0.05 ms and a gate time of 1.0 ms in time-resolved measurements, only phosphorescent emission of Eu(III) is observed with a high on/off ratio. Moreover, this probe is successfully used in time-resolved luminescence imaging to eliminate the background signal from biological autofluorescence without a washing process. This work provides a general strategy in designing Ln(III) complexes for detecting a broad range of biological molecules.
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