A facile, straightforward, and green method was reported for the preparation of water-soluble and highly luminescent silver nanoclusters (AgNCs) using captopril (Capt) as a stabilizing agent. The as-prepared Capt@AgNCs exhibited bright red emission with a strong peak centered at 637 nm and showed low toxicity and good stability. Interestingly, the AgNCs displayed temperature sensitivity based on obvious temperature dependence of the fluorescence emission intensity. Furthermore, the AgNCs showed a good reversible and linear response to the environment temperature over the range from 10 °C to 45 °C with a high resolution and activation energy, which allowed its potential application as a fluorescent nanothermometer. In addition, the AgNCs were prepared to monitor pH via the fluorescence intensity of AgNCs responding sensitively to pH fluctuating within a wide range from 2.08 to 6.06. The study provides promising applications as a convenient and eco-friendly fluorescent temperature and pH nanosenser in environmental and biological fields.

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据报道，使用卡托普利（Capt）作为稳定剂制备水溶性和高发光性的银纳米团簇（AgNCs）的方法简便，简单，绿色。所制备的Capt @ AgNCs发出鲜红色的光，中心在637 nm处有一个很强的峰，并显示出低毒性和良好的稳定性。有趣的是，基于荧光发射强度明显的温度依赖性，AgNCs显示出温度敏感性。此外，AgNC对环境温度在10°C至45°C范围内具有良好的可逆和线性响应，并具有高分辨率和活化能，这使其有可能作为荧光纳米温度计使用。此外，制备AgNC可以通过AgNC的荧光强度监测pH值，该荧光强度对pH在2.08至6.06的宽范围内波动敏感。这项研究为环境和生物领域中的便捷，环保的荧光温度和pH纳米传感器提供了有前途的应用。

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