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A 4,5-quinolimide-based fluorescent sensor for sequential detection of Cu2+ and cysteine in water and living cells with application in a memorized device.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-01-09 , DOI: 10.1016/j.saa.2020.118030 Yu Zhang 1 , Lan Li 1 , Jinping Wang 1 , Lihua Jia 1 , Rui Yang 1 , Xiangfeng Guo 1
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-01-09 , DOI: 10.1016/j.saa.2020.118030 Yu Zhang 1 , Lan Li 1 , Jinping Wang 1 , Lihua Jia 1 , Rui Yang 1 , Xiangfeng Guo 1
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In this study, a new 4,5-quinolimide-based fluorescent sensor BNC was synthesized and characterized. BNC showed single selectivity for Cu2+via the "turn-off" fluorescence among various common metal ions. After forming a 1:1 stoichiometric complex with Cu2+, the detection limit (LOD) of BNC for Cu2+ was measured to be 0.44 μM. Subsequently, the in situ generated BNC-Cu2+ complex had been used for sensing Cys with the LOD of 1.5 μM through the displacement strategy, resulting in the revivable emission of BNC. According to the "off-on-off" fluorescence cycle of BNC generated by the alternate addition of Cu2+ and Cys, a reversible memorized device with "read-write-read-erase" behavior was constructed at the molecular level. Furthermore, the recoveries of Cu2+ in lake water with BNC were in the range of 95.0-105%. And sequential fluorescence imagings of BNC for Cu2+ and Cys were successfully applied in living yeast cells.
中文翻译：
一种基于4,5-喹啉亚胺的荧光传感器，用于顺序检测水和活细胞中的Cu2 +和半胱氨酸，并应用于存储设备中。
在这项研究中，合成和表征了一种新的基于4,5-喹诺酮的荧光传感器BNC。BNC通过各种普通金属离子之间的“关闭”荧光显示出对Cu2 +的单一选择性。与Cu2 +形成1：1的化学计量配合物后，BNC对Cu2 +的检出限（LOD）测量为0.44μM。随后，原位生成的BNC-Cu2 +复合物已通过置换策略用于检测LOD为1.5μM的半胱氨酸，从而导致BNC可恢复释放。根据通过交替添加Cu2 +和Cys产生的BNC的“开-关-关”荧光循环，在分子水平上构建了具有“读写-读写-擦除”行为的可逆存储设备。此外，BNC在湖水中的Cu2 +回收率在95.0-105％之间。
更新日期：2020-01-09
中文翻译：
一种基于4,5-喹啉亚胺的荧光传感器，用于顺序检测水和活细胞中的Cu2 +和半胱氨酸，并应用于存储设备中。
在这项研究中，合成和表征了一种新的基于4,5-喹诺酮的荧光传感器BNC。BNC通过各种普通金属离子之间的“关闭”荧光显示出对Cu2 +的单一选择性。与Cu2 +形成1：1的化学计量配合物后，BNC对Cu2 +的检出限（LOD）测量为0.44μM。随后，原位生成的BNC-Cu2 +复合物已通过置换策略用于检测LOD为1.5μM的半胱氨酸，从而导致BNC可恢复释放。根据通过交替添加Cu2 +和Cys产生的BNC的“开-关-关”荧光循环，在分子水平上构建了具有“读写-读写-擦除”行为的可逆存储设备。此外，BNC在湖水中的Cu2 +回收率在95.0-105％之间。
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