A Highly Selective OFF-ON Red-Emitting Phosphorescent Thiol Probe with Large Stokes Shift and Long Luminescent Lifetime

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• 作者：Shaomin Ji ; Huimin Guo ; Xiaolin Yuan ; Xiaohuan Li ; Haidong Ding ; Peng Gao ; Chunxia Zhao ; Wenting Wu ; Wanhua Wu ; Jianzhang Zhao
• 刊名：Organic Letters
• 出版年：2010
• 出版时间：June 18, 2010
• 年：2010
• 卷：12
• 期：12
• 页码：2876-2879
• 全文大小：209K
• 年卷期：v.12,no.12(June 18, 2010)
• ISSN：1523-7052

文摘

An 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.