A Highly Selective OFF-ON Red-Emitting Phosphorescent Thiol Probe with Large Stokes Shift and Long Luminescent Lifetime
2010; American Chemical Society; Volume: 12; Issue: 12 Linguagem: Inglês
10.1021/ol100999j
ISSN1523-7060
AutoresShaomin Ji, Huimin Guo, Xiaolin Yuan, Xiaohuan Li, Haidong Ding, Peng Fei Gao, Chunxia Zhao, Wenting Wu, Wanhua Wu, Jianzhang Zhao,
Tópico(s)Molecular Sensors and Ion Detection
ResumoAn OFF-ON red-emitting phosphorescent thiol probe is designed by using the 3MLCT photophysics of Ru(II) complexes, i.e., with Ru(II) as the electron donor. The probe is non-luminescent because the MLCT is corrupted by electron transfer from Ru(II) to an intramolecular electron sink (2,4-dinitrobenzenesulfonyl). Thiols cleave the electron sink, and the MLCT is re-established. Phosphorescence at 598 nm was enhanced by 90-fold, with a 143 nm (5256 cm−1) Stokes shift and a 1.1 μs luminescent lifetime.
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