Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Jul 5;255:119711. doi: 10.1016/j.saa.2021.119711. Epub 2021 Mar 17.
A unique fluorescent probe for the detection of bisphenol A (BPA) was established by creating a molecularly imprinted polymer (MIP) shell on chromium (ΙΙΙ) oxide nanoparticles (CrO NPs). The advantages of high selectivity of MIPs and the strong fluorescence property of CrO NPs were combined for the preparation of the probe. MIPs-coated CrO NPs were composed by anchoring MIP layer on the surface of CrO NPs using one-pot precipitation polymerization. Acrylic-based monomer and cross-linker were used to prepared MIP. The MIP-coated CrO NPs were characterized by spectrofluorometery, Fourier transform infrared spectroscopy, transmission electron microscopy, field transmission electron microscopy, dynamic light scattering, EDX and elemental mapping. The prepared NPs showed strong fluorescence emission at 360 nm excited at 300 nm which quenched in the presence of BPA. The dynamic range of the optical sensor was in the range of 0.04-4.4 μmol L and the detection limit was 0.015 μmol L. The relative standard deviation was 2.2 and 1.3% for the concentration levels of 0.14 and 3.1 μmol L, respectively. The probe had a great selectivity in the determination of BPA with an imprinting factor of 6.3. The sensor was applied for the quantification of bisphenol A in water samples.
一种用于检测双酚 A (BPA) 的独特荧光探针是通过在三氧化铬纳米粒子 (CrO NPs) 上创建分子印迹聚合物 (MIP) 壳来建立的。MIPs 的高选择性和 CrO NPs 的强荧光性质的优势被结合用于制备探针。MIP 涂层的 CrO NPs 是通过在 CrO NPs 表面上使用一锅沉淀聚合来锚定 MIP 层而组成的。基于丙烯酸的单体和交联剂用于制备 MIP。通过荧光分光光度计、傅里叶变换红外光谱、透射电子显微镜、场发射透射电子显微镜、动态光散射、EDX 和元素映射对 MIP 涂层的 CrO NPs 进行了表征。制备的 NPs 在 300nm 激发下在 360nm 处显示出强荧光发射，在存在 BPA 的情况下被猝灭。光学传感器的动态范围在 0.04-4.4 μmol L 之间，检测限为 0.015 μmol L。对于 0.14 和 3.1 μmol L 的浓度水平，相对标准偏差分别为 2.2%和 1.3%。探针在测定 BPA 时具有很好的选择性，印迹因子为 6.3。该传感器用于水样中双酚 A 的定量分析。
