In the past few years, most studies have focused on smart substances that can respond to changes in the environment, as they can be appropriately applied in different fields, including biosensing, biotechnology, and drug delivery. Here, new fluorescent carbon dots (CDs) are synthesized by Terebinth by designing a simple and single-stage hydrothermal path, which facilitates the manufacture of CDs with no need for boring artificial methods, or using poisonous/costly solvents and starting substances. The method is used to concurrently form CDs and passivate their surface, which results in inherently emitted fluorescence. The study of the structure and optical features of the resulting CDs indicates blue emission at 440 nm, an average size of 4 nm, and a 3.2% quantum yield. The CDs respond pH-dependently ranging from pH 2–12. Increasing pH from 2 to 12 reduces the emission. Furthermore, a smartphone-based portable device (SPD) was designed to analyze pH real-time, comprising a device and a self-engineered APP called “Fluorimeter”. The CDs-based fluorescence sensing system and the detection platform performed excellently in analyzing real samples, which demonstrated high potentiality to be applied in practical monitoring.

过去几年，大多数研究都集中在能够响应环境变化的智能物质上，因为它们可以适当地应用于不同领域，包括生物传感、生物技术和药物输送。在这里，Terebinth合成了新的荧光碳点 (CD)通过设计一个简单的单级热液路径，这有利于 CD 的制造，而无需枯燥的人工方法，或使用有毒/昂贵的溶剂和起始物质。该方法用于同时形成 CD 并钝化其表面，从而产生固有的发射荧光。对所得 CD 的结构和光学特征的研究表明，蓝色发射波长为 440 nm，平均尺寸为 4 nm，量子产率为 3.2%。CD 的响应依赖于 pH 值，范围为 pH 2-12。将 pH 从 2 增加到 12 会减少排放。此外，基于智能手机的便携式设备 (SPD) 旨在实时分析 pH 值，包括一个设备和一个名为“荧光计”的自主设计的应用程序。