A novel photochromic diarylethene derivative containing a diaminomaleonitrile unit (1O) was synthesized and its colorimetric and fluorescent turn-on sensing of Cu²⁺ in acetonitrile solution was demonstrated. Both of its open- and closed-loop isomers (1O and 1C) were highly selective for Cu²⁺ with obvious absorption and color transforms. Moreover, the addition of Cu²⁺ enhanced the fluorescence of 1O up to 174-fold with the concomitant color change from colorless to blue. The limit of detections (LODs) for Cu²⁺ was determined to be 1.76 × 10⁻⁸ mol L⁻¹. The stoichiometry of 1: 1 between the probe 1O and Cu²⁺ was measured in Job’s plot and ESI-MS. Most remarkably, the probe 1O could be used to detect Cu²⁺ in test strip.

含有二氨基单元（A新型光致变色二芳基乙烯衍生物1O合成）和它的比色和荧光接通铜的感测²⁺在乙腈溶液中证实。它的开环和闭环异构体（1O和1C）对Cu ^2+的选择性都很高，具有明显的吸收和颜色转换。此外，Cu ^2+的添加增强了1O的荧光强度，最高可达174倍，同时颜色从无色变为蓝色。Cu ²⁺的检出限（LODs）确定为1.76×10 ^-8  mol L ^-1。在乔布氏图和ESI-MS中测量探针1O和Cu ²⁺之间的化学计量比为1：1 。最显着的是，探针1O可用于检测测试条中的Cu ²⁺。