Imaging Science and Photochemistry ›› 2015, Vol. 33 ›› Issue (2): 144-153.DOI: 10.7517/j.issn.1674-0475.2015.02.144

Previous Articles     Next Articles

Rhodamine-Pathalic Diamide Derivative for Colorimetric and Fluorescent "Turn-On" Detection of Cr3+

HAN Wen1, YANG Yunxu1, XU Tailin1, SHENG Ruilong2, LI Binlian1, ZHU Haibo1   

  1. 1. Department of Chemistry and Chemical Engineering, University of Science and Technology of Beijing, Beijing 100083, P.R.China;
    2. Shanghai Institute of Organic chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R.China
  • Received:2014-05-27 Revised:2014-09-11 Online:2015-03-15 Published:2015-03-15

Abstract:

In this work, a Rhodamine-phthalic diamide derivative (RP1) was synthesized and characterized. It exhibited high selectivity to Cr3+over other metal cations inaqueous solution, and the "turn-on" response could be easily detected by means of absorption and fluorescence spectra, furthermore, an obvious color change from colorless to pink could be spontaneouly observed. Quantitive results showed that the binding model of RP1 and Cr3+was in 1:1 stoichiometry and the binding constant was 3.43×104L/mol. Moreover, the mechanism study illustrated that the recognition of RP1 and Cr3+ went through a reversible coordination induced spiro-ring opening reaction, but not catalyzed hydrolysis of spiro-ring.

Key words: chemosensor, rhodamine B, phathalic diamide, Cr3+ detection