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A novel pillar[5]arene-based supramolecular organic framework gel to achieve ultrasensitive response by introducing the competition of cation∙∙∙π and π∙∙∙π interactions

Abstract

Ultrasensitive response property is an intriguing issue for stimuli-responsive materials. Herein, we report a novel method for achieve ultrasensitive response by introducing the competition of cation∙∙∙π and π∙∙∙π interactions into a pillar[5]arene-based supramolecular organic framework (SOF-AMP). The SOF-AMP was constructed by novel bis-naphthalimide functionalized pillar[5]arene, which could form stable supramolecular gel (SOF-AMP-G) in cyclohexanol. Interestingly, the SOF-AMP-G show ultrasensitive response for Fe3+ through the competition of cation∙∙∙π and π∙∙∙π interactions. Meanwhile, the Fe3+ coordinated SOF (MSOF-Fe) shown ultrasensitive response for H2PO4-, respectively. The SOF-AMP-G displayed a yellow fluorescence, whereas, after the addition of 0.5 equiv. of Fe3+ to SOF-AMP-G, the yellow fluorescence was quenched. The detection limits of SOF-AMP-G for Fe3+ is 7.54 × 10-9 M. More interestingly, the Fe3+ coordinated SOF gel (MSOF-Fe-G) could fluorescence “turn-on” sense H2PO4-. The detection limits of MSOF-Fe-G for H2PO4- is 4.21× 10-9 M. Simultaneously, Fe3+ and H2PO4- responsible thin films based on these SOF gels were prepared. Moreover, these SOF gels could be used for ultrasensitive ions sensors, fluorescent display materials as well as sensitive logic gates.

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Supplementary files

Publication details

The article was received on 02 Mar 2018, accepted on 05 Apr 2018 and first published on 13 Apr 2018


Article type: Paper
DOI: 10.1039/C8SM00426A
Citation: Soft Matter, 2018, Accepted Manuscript
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    A novel pillar[5]arene-based supramolecular organic framework gel to achieve ultrasensitive response by introducing the competition of cation∙∙∙π and π∙∙∙π interactions

    Y. Zhang, Y. Li, K. Zhong, W. Qu, X. Chen, H. Yao, T. Wei and Q. Lin, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C8SM00426A

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