Abstract This study examined the effect of two variables of rose pigments, and their extraction methods on optical properties of their synthesized carbon quantum dots. Afterward, a sensitive nanosensor based on fluorescence quenching of as prepared carbon dots is optimized for determination of Diazinon. The results indicated that the yellowish rose compounds obtained from alcoholic extraction are more stable and has higher quantum yield than others. Also the facile and reliable determination method has proved its ability for assessing the Diazinon in laboratory conditions as well as in real samples. The fluorescence decrement of carbon dots in the presence of Diazinon exhibits a linear relationship within the Diazinon concentration range of 0.02 to 1µM and the relative standard deviation (RSD) for the detection of 0.01 μM of Diazinon (n=3) is 3.5%.

中文翻译：

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不同方法提取的玫瑰色素对碳量子点光学性质的影响及其测定二嗪农的功效

摘要 本研究考察了玫瑰色素的两个变量及其提取方法对其合成碳量子点光学性质的影响。然后，基于所制备的碳点的荧光猝灭的灵敏纳米传感器被优化用于测定二嗪农。结果表明，醇提得到的淡黄色玫瑰化合物比其他化合物更稳定，量子产率更高。简便可靠的测定方法也证明了其在实验室条件和实际样品中评估二嗪农的能力。在二嗪农存在下，碳点的荧光衰减在二嗪农浓度范围 0.02 至 1μM 内呈线性关系，检测 0.01 μM 二嗪农 (n=3) 的相对标准偏差 (RSD) 为 3.5%。