Controllable polymeric pseudo-crown ether fluorescent sensors: responsiveness and selective detection of metal ions,New Journal of Chemistry

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Controllable polymeric pseudo-crown ether fluorescent sensors: responsiveness and selective detection of metal ions
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-12-28 , DOI: 10.1039/d0nj05201a
Le Zhao _{1,

2,

3,

4,

5} , Yong-Guang Jia _{1,

2,

3,

4,

5} , Song-Meng Wang _{1,

2,

3,

4,

5} , Yi Yang _{1,

2,

3,

4,

5} , Ling-Yan Liu _{1,

2,

3,

4,

5} , Wei-Xing Chang _{1,

2,

3,

4,

5} , Jing Li _{1,

2,

3,

4,

5}

Affiliation

A series of responsive polymeric fluorescent sensors (PDSM-PEG-F) were fabricated by post-grafting pyrene and poly(ethylene glycol) onto the backbone of a pseudo-crown ether containing cyclopolymers. These fluorescent sensors exhibited tunable dual-responsiveness towards temperature and pH, and showed good selective recognition toward metal ions above their phase transition temperatures. PDSM1-PEG1-F1 with a small pseudo-crown ether cavity (similar to 15-crown-5) exhibited selective detection towards Cu²⁺ and Ag⁺ at 33 °C, showing detection limits of 1.20 μM and 0.75 μM, respectively, PDSM1-PEG2-F1 and PDSM2-PEG1-F1 towards Fe³⁺ and Ag⁺, and PDSM3-PEG1-F1 towards Na⁺ and Au⁺. This thermo-sensitive controllable selectivity toward metal ions would provide an efficient strategy for fabricating other diverse fluorescent sensors by simply changing the size of the pseudo-crown ether cavities in the cyclopolymers.

中文翻译：

可控的聚合伪冠醚荧光传感器：金属离子的响应性和选择性检测

通过将pyr和聚乙二醇后接枝到含有环冠的假冠醚的骨架上，制造了一系列响应性聚合物荧光传感器（PDSM-PEG-F）。这些荧光传感器对温度和pH值具有可调的双响应性，并且对高于其相变温度的金属离子具有良好的选择性识别。PDSM1-PEG1-F1具有一个小的伪冠醚腔（类似于15冠-5），在33°C时对Cu ²⁺和Ag ⁺表现出选择性检测，检测极限分别为1.20μM和0.75μM，PDSM1 -PEG2-F1和PDSM2-PEG1-F1对Fe ³⁺和Ag ⁺和PDSM3-PEG1-F1朝向Na ⁺和Au ⁺。通过简单地改变环聚合物中伪冠醚腔的尺寸，这种对金属离子的热敏可控选择性将为制造其他多样的荧光传感器提供有效的策略。

更新日期：2021-01-18

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