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Surface-imprinted β-cyclodextrin-functionalized carbon nitride nanosheets for fluorometric determination of sterigmatomycin
Microchimica Acta ( IF 5.3 ) Pub Date : 2019-11-19 , DOI: 10.1007/s00604-019-3867-x Jianrong Shi 1, 2, 3 , Geyuan Li 4 , Yanru Cui 4 , Yan Zhang 4 , Donghao Liu 4 , Yi Shi 4 , Hua He 4, 5, 6
Microchimica Acta ( IF 5.3 ) Pub Date : 2019-11-19 , DOI: 10.1007/s00604-019-3867-x Jianrong Shi 1, 2, 3 , Geyuan Li 4 , Yanru Cui 4 , Yan Zhang 4 , Donghao Liu 4 , Yi Shi 4 , Hua He 4, 5, 6
Affiliation
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β-Cyclodextrin-functionalized carbon nitride nanosheets were modified with a molecularly imprinted polymer to obtain a fluorescent probe of type MIP@β-CD/CNNS which is shown to enable fluorometric determination of sterigmatocystin (STG). The material was characterized by transmission electron microscopy, infrared spectra, powder X-ray diffraction, X-ray photoelectron spectroscopy, and by absorption and emission spectra. The modified CNNSs have a good fluorescence quantum yield (13%), high sorption capacity for STG (86 mg·g−1), fast adsorption rate (25 min), and superior adsorption selectivity (with an imprint factor 2.56). When used as an optical probe for STG, the CNNSs act as the chromophore, while β-CD and MIP act as the recognition groups. The blue fluorescence of MIP@β-CD/CNNS (with excitation/emission maxima at 368/432 nm) is quenched by STG. Fluorescence drops linearly in the 0.15 to 3.1 μM STG concentration range. The lower detection limit is 74 nM. The method was successfully applied to the determination of STG in spiked wheat extract. Conceivably, this detection scheme based on a combination of β-CD inclusion and molecular imprinting may be extended to the detection of various other organic compounds. Graphical abstract Schematic representation of the preparation of surface-imprinted β-cyclodextrin-functionalized carbon nitride nanosheets. These are used, along with a molecularly imprinted polymer, for fluorometric determination of sterigmatomycin. Schematic representation of the preparation of surface-imprinted β-cyclodextrin-functionalized carbon nitride nanosheets. These are used, along with a molecularly imprinted polymer, for fluorometric determination of sterigmatomycin.
中文翻译：
表面印迹β-环糊精功能化的氮化碳纳米片用于荧光法测定杂菌霉素
用分子印迹聚合物修饰β-环糊精功能化的氮化碳纳米片，以获得 MIP@β-CD/CNNS 类型的荧光探针，该探针可用于荧光法测定 sterigmatocystin (STG)。该材料通过透射电子显微镜、红外光谱、粉末 X 射线衍射、X 射线光电子能谱以及吸收和发射光谱进行表征。修饰后的CNNS具有良好的荧光量子产率（13%）、高STG吸附容量（86 mg·g-1）、快速吸附速率（25 min）和优异的吸附选择性（印迹因子为2.56）。当用作 STG 的光学探针时，CNNSs 作为发色团，而 β-CD 和 MIP 作为识别基团。MIP@β-CD/CNNS 的蓝色荧光（激发/发射最大值在 368/432 nm）被 STG 淬灭。荧光在 0.15 到 3.1 μM STG 浓度范围内线性下降。检测下限为 74 nM。该方法已成功应用于加标小麦提取物中STG的测定。可以想象，这种基于 β-CD 包含和分子印迹相结合的检测方案可以扩展到各种其他有机化合物的检测。图形摘要 表面印迹 β-环糊精功能化氮化碳纳米片的制备示意图。它们与分子印迹聚合物一起用于荧光法测定 sterigmatomycin。表面印迹β-环糊精功能化氮化碳纳米片的制备示意图。这些与分子印迹聚合物一起用于荧光法测定 sterigmatomycin。
更新日期：2019-11-19
中文翻译：
表面印迹β-环糊精功能化的氮化碳纳米片用于荧光法测定杂菌霉素
用分子印迹聚合物修饰β-环糊精功能化的氮化碳纳米片，以获得 MIP@β-CD/CNNS 类型的荧光探针，该探针可用于荧光法测定 sterigmatocystin (STG)。该材料通过透射电子显微镜、红外光谱、粉末 X 射线衍射、X 射线光电子能谱以及吸收和发射光谱进行表征。修饰后的CNNS具有良好的荧光量子产率（13%）、高STG吸附容量（86 mg·g-1）、快速吸附速率（25 min）和优异的吸附选择性（印迹因子为2.56）。当用作 STG 的光学探针时，CNNSs 作为发色团，而 β-CD 和 MIP 作为识别基团。MIP@β-CD/CNNS 的蓝色荧光（激发/发射最大值在 368/432 nm）被 STG 淬灭。荧光在 0.15 到 3.1 μM STG 浓度范围内线性下降。检测下限为 74 nM。该方法已成功应用于加标小麦提取物中STG的测定。可以想象，这种基于 β-CD 包含和分子印迹相结合的检测方案可以扩展到各种其他有机化合物的检测。图形摘要 表面印迹 β-环糊精功能化氮化碳纳米片的制备示意图。它们与分子印迹聚合物一起用于荧光法测定 sterigmatomycin。表面印迹β-环糊精功能化氮化碳纳米片的制备示意图。这些与分子印迹聚合物一起用于荧光法测定 sterigmatomycin。
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