Department of Chemistry, College of Science, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Carbon Based Electrode Materials, North University of China, Taiyuan 030051, PR China.
Department of Chemistry, College of Science, North University of China, Taiyuan 030051, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Oct 15;279:121346. doi: 10.1016/j.saa.2022.121346. Epub 2022 May 5.
RhB@ZrT-1-OH composite was constructed by introduction of Rhodamine B (RhB) into the cages of zirconium-based metal-organic cage that had two fluorescence emission peaks at 466 and 612 nm upon excitation at 327 nm. The dual-emission fluorescence sensor exhibits ultra-high sensitive detection for malachite green (MG) and glycine (Gly) in phosphate buffer solution (pH = 6.86). RhB@ZrT-1-OH as a ratiometric fluorescence probe was applied to detect MG with a low LOD of 0.2879 μM and presented obvious fluorescence visual changes from orange to purple to blue under 254 nm UV-vis lamp. Moreover, RhB@ZrT-1-OH also can be utilized as a "turn-on" fluorescence sensor to recognize Gly with a low LOD of 0.3747 μM and exhibits fluorescence color changes from orange to pink to purple. Notably, the corresponding test papers for sensing MG and Gly were designed for recognize the concentration of MG and Gly. Furthermore, the dual-emission fluorescence sensor can be used to detect MG and Gly in fish and human serum with high sensitivity and reliable. The possible detecting mechanisms of RhB@ZrT-1-OH for sensing MG and Gly were detailedly explored.
RhB@ZrT-1-OH 复合材料是通过将罗丹明 B（RhB）引入具有两个荧光发射峰的锆基金属有机笼的笼中而构建的，在 327nm 激发下，其荧光发射峰分别位于 466nm 和 612nm。该双发射荧光传感器对磷缓冲溶液（pH=6.86）中的孔雀石绿（MG）和甘氨酸（Gly）表现出超高灵敏的检测性能。RhB@ZrT-1-OH 作为比率荧光探针可用于检测 MG，其检测限（LOD）低至 0.2879μM，并在 254nm 紫外灯下呈现出明显的荧光肉眼可见变化，从橙色变为紫色再变为蓝色。此外，RhB@ZrT-1-OH 还可以作为“开启”荧光传感器来识别 Gly，其检测限（LOD）低至 0.3747μM，并呈现出从橙色变为粉红色再变为紫色的荧光颜色变化。值得注意的是，还设计了用于检测 MG 和 Gly 的相应传感试纸，以识别 MG 和 Gly 的浓度。此外，该双发射荧光传感器可用于高灵敏度和可靠地检测鱼肉和人血清中的 MG 和 Gly。详细探讨了 RhB@ZrT-1-OH 用于检测 MG 和 Gly 的可能检测机制。
