Due to the high toxicity and commercial availability of phosgene, there is an urgent need for rapid and reliable detection of phosgene in order to deal with a potentially severe threat to public security caused by terrorist and accidental industrial release. In this work, an iridium(Ⅲ) complex, Ir-OXIME, has been developed as a fast, highly sensitive and selective sensor for phosgene. Ir-OXIME displayed very weak phosphorescence due to quenching caused by the C=N–OH moiety. After reacting with phosgene, the oxime is converted to a nitrile to form the brightly phosphorescent product, Ir–CN. Ir-OXIME exhibited a rapid response (<5 s), a low detection limit (2.4 nM), and a high selectivity towards phosgene in solution. The Stokes shift of Ir-OXIME reaches 294 nm, which prevented signal crosstalk and consequently improved sensing accuracy. Finally, test papers with Ir-OXIME immobilized on filter paper were designed and prepared as a practical detection tool of phosgene gas.

由于光气的高毒性和商业可得性，迫切需要快速可靠地检测光气，以应对恐怖分子和意外工业释放对公共安全的潜在严重威胁。在这项工作中，已开发出铱（Ⅲ）络合物Ir-OXIME作为光气的快速，高度灵敏和选择性的传感器。Ir-OXIME由于C = N-OH部分引起的淬灭而显示出非常弱的磷光。与光气反应后，肟转化为腈，形成了明亮的磷光产物Ir-CN。Ir-肟表现出快速响应（<5 s），低检测限（2.4 nM）和对溶液中光气的高选择性。Ir-OXIME的斯托克斯位移达到294 nm，从而防止了信号串扰，从而提高了传感精度。最后，设计并制备了固定在滤纸上的Ir-OXIME试纸，作为一种实用的光气检测工具。