A Rhodamine Derivative Based Chemosensor with High Selectivity and Quick Respond to Cr3+ in Aqueous Solution |
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| Authors: | Zhenglong Yang Sai Chen Feng Li Yilong Bu Yuchuan Du Peiting Zhou Zhihao Cheng |
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| Affiliation: | 1.College of Transportation Engineering, Key Laboratory of Road and Traffic Engineering of Ministry of Education,Tongji University,Shanghai,China;2.School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai,China;3.School of Transportation Science and Engineering,Beihang University,Beijing,People’s Republic of China;4.Broadvision Engineering Consultants,National Engineering Laboratory for Land Transport Meteorological Disaster Control Technology,Kunming,China |
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| Abstract: | In this paper, a new kind of colorimetric chemsensor aiming at detecting Cr3+ has been synthesized, and it is based on the “Off-On” effect of a rhodamine derivative. Comparing with other metal irons (Na+, K+, Ni2+, Hg2+, Fe3+, Mn2+, Co2+, Cd2+, Cu2+, Pb2+, Zn2+, Mg2+, Ba2+, Ag+, Fe2+, Ce3+), the chemsensor has a quick and accurate response to Cr3+ in H2O-EtOH solution (4/1, v/v). There is an obvious change in color, from colorless to bright pink when Cr3+ is detected. According to the fitting curve based on Benesi-Hildebrand equation and working curve of absorption strength in UV-vis spectrum, the binding pattern of Cr3+ and the rhodamine derivative follows a 1:1 stoichiometry. The chemsensor shows great potential in monitoring Cr3+ in the aqueous medium with high efficiency, which is supposed to complete the recognition in the minimum as 5.2?×?10?7 mol/L within 5 min. |
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