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Embedding dual fluoroprobe in metal-organic frameworks for continuous visual recognition of Pb2+ and PO43- via fluorescence 'turn-off-on' response: Agar test paper and fingerprint.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-20 , DOI: 10.1016/j.jhazmat.2020.122141 Kuiyu Yi 1 , Lei Zhang 1
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-20 , DOI: 10.1016/j.jhazmat.2020.122141 Kuiyu Yi 1 , Lei Zhang 1
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A novel dual-emissive ratiometric fluorescence (RF) probe CDs/QDs@ZIF-8 has been successfully constructed by employing a simple and effective strategy for in situ encapsulating carbon dots (CDs) and thioglycolic acid-modified CdTe quantum dots (QDs) into porous metal-organic frameworks (MOFs) "cage". The dual responsive colorimetric fluorescence probe was developed for the ultra-high selectivity and sensitivity continuous detection of Pb2+ (turn OFF) and PO43- (turn ON) in biological samples. Blue CDs acts as a stable internal standard emission, the emission color of CDs/QDs@ZIF-8 changes from red to blue with introducing Pb2+, fluorescence of probe is quenched because of the binding of Pb2+ ions to thioglycolic acid on the surface of probe and e- transfer from the photoexcited QDs to Pb2+ ions, color can be recovered after the adding PO43- to CDs/QDs@ZIF-8-Pb2+ system, which could take away Pb2+ ions from the surface of CDs/QDs@ZIF-8. More importantly, fabricated agar test papers was also successfully applied in visual detection of Pb2+ and PO43- in real samples, which can implement without instrument-specific calibration.
中文翻译：
将双氟探针嵌入金属-有机框架中，以通过荧光“关闭”响应连续视觉识别Pb2 +和PO43-：琼脂试纸和指纹。
通过采用一种简单有效的策略将碳点（CD）和巯基乙酸修饰的CdTe量子点（QD）原位封装到其中，已成功构建了新型的双发射比率荧光（CD）/ QDs @ ZIF-8多孔金属有机框架（MOF）“笼”。开发了双响应比色荧光探针，用于生物样品中Pb2 +（关闭）和PO43-（打开）的超高选择性和灵敏度连续检测。蓝色CD用作稳定的内标发射，随着Pb2 +的引入，CDs / QDs @ ZIF-8的发射颜色从红色变为蓝色，由于Pb2 +离子与探针表面的巯基乙酸结合，探针的荧光被猝灭从光激发的量子点电子转移到Pb2 +离子，在CD / QDs @ ZIF-8-Pb2 +系统中添加PO43-后，颜色可以恢复，这可以从CD / QDs @ ZIF-8表面带走Pb2 +离子。更重要的是，人造琼脂试纸也成功地用于肉眼可见的真实样品中Pb2 +和PO43-的检测，无需进行仪器特定的校准即可实现。
更新日期：2020-01-21
中文翻译：
将双氟探针嵌入金属-有机框架中，以通过荧光“关闭”响应连续视觉识别Pb2 +和PO43-：琼脂试纸和指纹。
通过采用一种简单有效的策略将碳点（CD）和巯基乙酸修饰的CdTe量子点（QD）原位封装到其中，已成功构建了新型的双发射比率荧光（CD）/ QDs @ ZIF-8多孔金属有机框架（MOF）“笼”。开发了双响应比色荧光探针，用于生物样品中Pb2 +（关闭）和PO43-（打开）的超高选择性和灵敏度连续检测。蓝色CD用作稳定的内标发射，随着Pb2 +的引入，CDs / QDs @ ZIF-8的发射颜色从红色变为蓝色，由于Pb2 +离子与探针表面的巯基乙酸结合，探针的荧光被猝灭从光激发的量子点电子转移到Pb2 +离子，在CD / QDs @ ZIF-8-Pb2 +系统中添加PO43-后，颜色可以恢复，这可以从CD / QDs @ ZIF-8表面带走Pb2 +离子。更重要的是，人造琼脂试纸也成功地用于肉眼可见的真实样品中Pb2 +和PO43-的检测，无需进行仪器特定的校准即可实现。
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