Highly sensitive iridium(III) complex-based phosphorescent probe for thiophenol detection
Highly sensitive iridium(III) complex-based phosphorescent probe for thiophenol detection
复制标题
用于苯硫酚检测的高灵敏度铱 (III) 复合物磷光探针
DOI：
10.1039/c7dt02263h
复制
发表时间：
2017
影响因子：
4
通讯作者：
Lu Zhiyun
中科院分区：
文献类型：
--
作者：
Xiong Li;Yang Lin;Luo Shuai;Huang Yan;Lu Zhiyun
A cyclometalated iridium(III) complex (Ir-DNBS) was designed and synthesized as a high-performance phosphorescent thiophenol probe. Ir-DNBS displays a distinct phosphorescence “off–on” response toward thiophenol with high selectivity, high sensitivity (detection limit: 2.5 nM) and fast response (10 min). It is noteworthy that the signaling phosphore of Ir-DNBS possesses relatively high photoluminescence quantum efficiency (ΦPL = 0.21) together with relatively long lifetime (τ = 2.07 μs), indicative of its potential in achieving high temporal resolution. Ir-DNBS is also applicable to the detection of thiophenol in actual water samples with high recovery rate. Photophysical and spectral characterization results revealed that the probing mechanism of Ir-DNBS toward thiophenol lies in the thiolate-mediated cleavage reaction, resulting in suppressed photo-induced excited state electron transfer process in the reaction product.
