State Key Laboratory of Fine Chemicals, School of Chemical Engineering, 158 Zhongshan Road, Dalian University of Technology, Dalian 116012, PR China.
Org Lett. 2010 Jun 18;12(12):2876-9. doi: 10.1021/ol100999j.
An OFF-ON red-emitting phosphorescent thiol probe is designed by using the (3)MLCT 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 mus luminescent lifetime.
一种 OFF-ON 型红色磷光硫醇探针是通过利用 Ru(II) 配合物的 (3)MLCT 光物理性质设计的，即 Ru(II) 作为电子给体。由于 MLCT 受到电子从 Ru(II) 向分子内电子受体（2,4-二硝基苯磺酰基）的转移的影响而被破坏，因此探针是无发光的。硫醇会切断电子受体，从而重新建立 MLCT。磷光在 598nm 处增强了 90 倍，具有 143nm（5256cm(-1))的斯托克斯位移和 1.1μs 的发光寿命。
