Wei Haibing, Zhang Jinlong, Shi Nan, Liu Yang, Zhang Ben, Zhang Jie, Wan Xinhua
Beijing National Laboratory for Molecular Sciences , Key Laboratory of Polymer Chemistry and Physics of Ministry of Education , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China . Email:
School of Chemistry and Chemical Engineering , Provincial Key Laboratory of Advanced Functional Materials and Devices , Hefei University of Technology , Hefei , Anhui 230009 , China.
Chem Sci. 2015 Dec 1;6(12):7201-7205. doi: 10.1039/c5sc02020d. Epub 2015 Sep 7.
A new type of supramolecular chemosensor based on the polyoxometalate (POM) NaDyWO (DyW) and the block copolymer poly(ethylene oxide-,-dimethylaminoethyl methacrylate) (PEO--PDMAEMA) is reported. By taking advantage of the CO sensitivity of PDMAEMA blocks to protonate the neutral tertiary amino groups, CO can induce the electrostatic coassembly of anionic DyW with protonated PDMAEMA blocks, and consequently trigger the luminescence chromism of DyW due to the change in the microenvironment of Dy. The hybrid complex in dilute aqueous solution is very sensitive to CO content and shows rapid responsiveness in luminescence. The luminescence intensity of the DyW/PEO--PDMAEMA complex increases linearly with an increasing amount of dissolved CO, which permits the qualitative and quantitative detection of CO. The complex solution also shows good selectivity for CO, with good interference tolerance of CO, N, HCl, HO and SO. The supramolecular chemosensor can be recycled through disassembly of the hybrid complex by simply purging with inert gases to remove CO.
报道了一种基于多金属氧酸盐（POM）NaDyWO（DyW）和嵌段共聚物聚（环氧乙烷-，-甲基丙烯酸二甲氨基乙酯）（PEO--PDMAEMA）的新型超分子化学传感器。利用PDMAEMA嵌段对CO的敏感性使中性叔氨基质子化，CO可诱导阴离子型DyW与质子化的PDMAEMA嵌段发生静电共组装，进而由于Dy微环境的变化触发DyW的发光变色。稀水溶液中的杂化复合物对CO含量非常敏感，且在发光方面表现出快速响应。DyW/PEO--PDMAEMA复合物的发光强度随溶解CO量的增加呈线性增加，这使得能够对CO进行定性和定量检测。该复合溶液对CO也表现出良好的选择性，对CO、N、HCl、HO和SO具有良好的抗干扰能力。通过简单地用惰性气体吹扫以去除CO来拆解杂化复合物，超分子化学传感器即可循环使用。
