In this work, boron-doped carbon dots (B-CDs) with blue fluorescence and phosphorous-doped green emitting CDs (P-CDs) were encapsulated into zeolitic imidazolate framework-8 (ZIF-8) to prepare a dual-emission ratiometric fluorescence sensor for triticonazole. The B-CDs/P-CDs@ZIF-8 composite exhibited two emission peaks at 440 nm and 510 nm under a single wavelength excitation of 385 nm that respectively belong to B-CDs and P-CDs. In the presence of triticonazole, the fluorescence intensity of B-CDs remarkably declined while that of P-CDs remained unchanged. With increasing concentration of triticonazole, the fluorescence color of the ratiometric probe progressively changed from blue to green. Under the optimized conditions, B-CDs/P-CDs@ZIF-8 probe showed a high sensitivity with a linear range from 10 to 400 nM and a detection limit of 4.0 nM for triticonazole. The probe not only has an improved sensitivity through the accumulation of analyte molecules into the metal-organic framework but also has the advantages of ratiometric fluorescence measurements in terms of precision and accuracy. The applicability of the sensor was evaluated in the analysis of water and fruit juice samples.

在这项工作中，将带有蓝色荧光的掺硼碳点（B-CD）和掺磷的绿色发光CD（P-CD）封装到沸石咪唑酸酯骨架8（ZIF-8）中，以制备双发射比例荧光曲康唑传感器。B-CDs / P-CDs @ ZIF-8复合材料在385 nm的单波长激发下在440 nm和510 nm处出现两个发射峰，分别属于B-CD和P-CD。在存在苯噻唑的情况下，B-CD的荧光强度显着下降，而P-CD的荧光强度保持不变。随着三苯甲基咪唑浓度的增加，比例探针的荧光颜色逐渐从蓝色变为绿色。在优化条件下，B-CDs / P-CDs @ ZIF-8探针显示出高灵敏度，线性范围为10到400 nM，检测极限为4。Triticonazole为0 nM。该探针不仅通过将分析物分子积累到金属有机骨架中而提高了灵敏度，而且在精确度和准确性方面具有比例荧光测量的优势。在分析水和果汁样品时评估了传感器的适用性。