A novel cyclometalated iridium(III) complex 1oo including photochromic diarylethene (DTE) units and 2,4-dinitrobenzenesulfonyl (DNBS) group was designed and synthesized as a probe for thiophenol. Due to the intramolecular charge transfer (ICT) mechanism, probe 1oo displayed almost non-fluorescence. After nucleophilic elimination reaction occurred triggered by thiophenol a fluorescence complex 2oo was generated, the ICT process was blocked and obvious fluorescence enhancement centred at ca. 450 nm was observed. Moreover, during the detection process, fluorescent behavior of probe 1oo could be modulated upon alternate irradiations of UV and Vis light, ascribed to photochromic diarylethene molecules in the CˆN ligands could play the part of fluorescent switch. Probe 1oo exhibited excellent sensitivity (LOD: 2.43 μM), selectivity and rapid response (15 min) to thiophenol.

一种新颖的环金属化的铱（III）络合物1OO包括光致变色二芳基乙烯（DTE）单元和2,4-二硝基苯（DNBS）基团被设计并作为苯硫酚的探针合成。由于分子内的电荷转移（ICT）机制，探针1oo几乎没有荧光。在由苯酚引发的亲核消除反应发生后，生成了荧光配合物2oo，阻止了ICT的过程，并且荧光增强明显集中在大约。观察到450nm。此外，在检测过程中，探针1oo的荧光行为C alternateN配体中的光致变色二芳基乙烯分子可通过交替照射紫外线和可见光来调节，这可能是荧光开关的一部分。探针1oo表现出出色的灵敏度（LOD：2.43μM），选择性和对苯硫酚的快速响应（15分钟）。