In this work, a facile synthetic route was established for the synthesis of highly blue fluorescent tyrosine coated molybdenum oxide quantum dots (Tyr-MoO₃ QDs). Tyrosine (Tyr) was used as a surface ligand for the functionalization of MoO₃ QDs with Tyr, thereby generating a highly blue fluorescent Tyr-MoO₃ QDs. The obvious color changes were noticed in the solution of MoO₃ NPs, MoO₃-OH NPs and Tyr-MoO₃ QDs under UV lamp and in day light. The Tyr-MoO₃ QDs exhibited a maximum emission intensity at 416 nm by applying an excitation wavelength of 330 nm. The as-prepared Tyr-MoO₃ QDs acted as a sensor for the fast and sensitive identification of imidacloprid via fluorescence quenching mechanism. The emission peak of Tyr-MoO₃ QDs at 416 nm exhibited a linear quenching with increasing concentration of imidacloprid, noticing a good linear relationship between I₀/I values and imidacloprid in the range of 0.045–1.00 μM with a correlation coefficient of 0.9955. The developed probe was effectively applied for the detection of imidacloprid in real samples.

在这项工作中，为合成高蓝色荧光酪氨酸涂层的氧化钼量子点（Tyr-MoO ₃ QDs）建立了一条简便的合成途径。酪氨酸（Tyr）用作表面配体，用于用Tyr对MoO ₃ QD进行功能化，从而生成高蓝色荧光Tyr-MoO ₃ QD。在紫外灯和日光下，MoO ₃ NPs，MoO ₃ -OH NPs和Tyr-MoO ₃ QDs溶液中均出现明显的颜色变化。通过施加330 nm的激发波长，Tyr-MoO ₃ QD在416 nm处显示出最大发射强度。准备好的Tyr-MoO ₃量子点通过荧光猝灭机制作为快速，灵敏地鉴定吡虫啉的传感器。Tyr-MoO ₃ QDs在416 nm处的发射峰随吡虫啉浓度的增加表现出线性猝灭，注意到I ₀ / I值与吡虫啉在0.045–1.00μM范围内具有良好的线性关系，相关系数为0.9955。所开发的探针可有效地用于实际样品中吡虫啉的检测。