A Highly Selective OFF-ON Red-Emitting Phosphorescent Thiol Probe with Large Stokes Shift and Long Luminescent Lifetime
A Highly Selective OFF-ON Red-Emitting Phosphorescent Thiol Probe with Large Stokes Shift and Long Luminescent Lifetime
复制标题
具有大斯托克斯位移和长发光寿命的高选择性关-开红光磷光硫醇探针
DOI：
10.1021/ol100999j
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发表时间：
2010-06-18
期刊：
影响因子：
5.2
通讯作者：
Zhao, Jianzhang
中科院分区：
文献类型：
--
作者：
Ji, Shaomin;Guo, Huimin;Zhao, Jianzhang
利用Ru（II）配合物的(MLCT)-M-3光物理特性，即以Ru（II）为电子供体，设计了一种OFF-ON红色发光硫醇探针。探针是不发光的，因为电子从Ru（II）转移到分子内电子汇（2,4-二硝基苯磺酰基）破坏了MLCT。硫醇切断电子汇，MLCT重新建立。598 nm处的磷光增强90倍，Stokes位移为143 nm (5256 cm(-1))，发光寿命为1.1 μ s。
An OFF-ON red-emitting phosphorescent thiol probe is designed by using the (MLCT)-M-3 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 mu s luminescent lifetime.