CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, 730000, People's Republic of China.
University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Mikrochim Acta. 2021 Jan 22;188(2):46. doi: 10.1007/s00604-021-04700-9.
A fluorescent nanosensor based on silicon-containing nanoparticles (Si CNPs) with green fluorescence (FL) was prepared by one-step method. The prepared Si CNPs emitted green FL at 470 nm under the excitation at 350 nm. The FL signal of Si CNPs reveals an obvious enhancement in the presence of resorcinol (RC), due to the passivation of surface trap states of Si CNPs via the binding of OH group of RC with the NH group of Si CNPs, which allowed the formation of new radiative electron-hole recombination centers. This was confirmed by some analytical experiments performed on zeta potential, FL lifetime steady state, and the FTIR spectra. Most importantly, this nanosensor could selectively determine RC with high sensitivity and without interference from hydroquinone (HQ) and catechol (CT) as RC isomers. RC was detected in the linear range 0.05-40 μM, with a detection limit of 0.012 μM. The synthesized nanosensor was applied to the determination of RC in fresh fruit juice and water samples. The collected results confirmed the feasibility of our approach with high accuracy.
一种基于含硅纳米粒子（SiCNPs）的荧光纳米传感器，具有绿色荧光（FL），通过一步法制备。所制备的 SiCNPs 在 350nm 激发下发射 470nm 的绿色 FL。在间苯二酚（RC）存在下，SiCNPs 的 FL 信号显示出明显的增强，这是由于 RC 的 OH 基团与 SiCNPs 的 NH 基团结合，从而钝化了 SiCNPs 的表面陷阱态，形成了新的辐射电子-空穴复合中心。这通过zeta 电位、FL 寿命稳态和 FTIR 光谱的一些分析实验得到了证实。最重要的是，这种纳米传感器可以选择性地、高灵敏度地测定 RC，而不受 RC 异构体对苯二酚（HQ）和邻苯二酚（CT）的干扰。RC 在 0.05-40μM 的线性范围内被检测到，检测限为 0.012μM。所合成的纳米传感器用于测定新鲜果汁和水样中的 RC。所收集的结果证实了我们的方法具有高准确性的可行性。
