点击次数：

论文类型：期刊论文

发表时间：2016-12-01

发表刊物：ADVANCED SCIENCE

收录刊物：SCIE、EI、PubMed、Scopus

卷号：3

期号：12

页面范围：1600146

ISSN号：2198-3844

关键字：europium complex,luminescence probe,protein detection,time‐resolved imaging

摘要：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.