Colorimetric ??naked-eye?? sensor for anions based on conformational flexible tripodal receptor |
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| Authors: | Shuang Bao Wei-tao Gong Wen-dan Chen Jun-wei Ye Yuan Lin Gui-ling Ning |
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| Institution: | 1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 116012, Dalian, People??s Republic of China
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| Abstract: | A new tripodal receptor for anion sensing based on amide-pyridinium as recognition site and nitro-benzene as signaling unit was designed and successfully synthesized. This receptor showed high selectivity and strong binding affinity toward AcO? over the investigated anions, especially over H2PO4 ?. Addition of AcO? induced clear color change of solution from colorless to yellow, realizing the ??naked-eye?? detection. UV?CVis and 1H NMR experiments indicated the selectivity might origin from the synergistic effects arising from hydrogen bonding, electrostatic interactions and conformational change. |
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