In this work, we synthesized a simple fluorescent probe, which can selectively detect cysteine. With addition of cysteine, the probe solution showed marked color change from pale yellow to orange color by naked eye. There was an excellent linear relationship between fluorescence intensity of probe and cysteine concentration. Moreover, the probe displayed satisfactory detection limit. Low toxicity and cellular imaging offered the important conditions for detecting cysteine in biological system.

中文翻译：

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具有可见颜色变化的简单探针，可选择性检测半胱氨酸

在这项工作中，我们合成了一个简单的荧光探针，可以选择性地检测半胱氨酸。加入半胱氨酸后，探针溶液用肉眼显示出从浅黄色到橙色的明显颜色变化。探针的荧光强度与半胱氨酸浓度之间存在极好的线性关系。而且，该探针显示出令人满意的检测极限。低毒性和细胞成像为检测生物系统中的半胱氨酸提供了重要条件。