A Highly Selective Colorimetric Sensor for Cu2+ Based on Phenolic Group Biscarbonyl Hydrazone |
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| Authors: | Junjian Li Ying Guo Hong Yao Qi Lin Yongqiang Xie Taibao Wei Youming Zhang |
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| Affiliation: | 1. Key Laboratory of Eco‐Environment‐Related Polymer Materials, Ministry of Education of China;2. Key Laboratory of Polymer Materials of Gansu Province;3. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China |
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| Abstract: | A novel copper selective sensor 2 based on hydrazide and salicylaldehyde has been designed and prepared. Sensor 2 behaves a single selectivity and sensitivity in the recognition for Cu2+ over other metal ions such as Fe3+, Hg2+, Ag+, Ca2+, Zn2+, Pb2+, Cd2+, Ni2+, Co2+, Cr3+ and Mg2+ in DMSO. The distinct color change and the rapid changement of fluorescence emission provide naked‐eyes detection for Cu2+. The UV‐vis data indicate that 1:2 stoichiometry complex is formed by sensor 2 and Cu2+. The association constant Ks was 3.51×104 mol?1·L. The detection limitation of Cu2+ with the sensor 2 was 2.2×10?7 mol·L?1. The sensing of Cu2+ by this sensor was found to be reversible, with the Cu2+‐induced color being lost upon addition of EDTA. |
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| Keywords: | copper ion colorimetric sensor biscarbonyl hydrazone single selectivity |
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