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Journal of Spectroscopy
Volume 2013, Article ID 878234, 7 pages
Research Article

Recognition Preference of Rhodamine Derivative Bearing Phthalimido Gly for by UV-Vis and Fluorescence Spectroscopy

State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, China

Received 30 June 2012; Accepted 26 August 2012

Academic Editor: María Carmen Yebra-Biurrun

Copyright © 2013 Fanyong Yan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An effective Hg2+-specific probe 1 was designed and prepared based on Phthalimido Gly modified rhodamine B. The sensing behavior of probe 1 was studied by UV-Vis and fluorescence spectroscopy. Probe 1 showed excellent high selectivity and sensitivity towards Hg2+ over commonly coexistent metal ions in neutral solution, which could be attributed to the Hg2+-triggered ring opening of the spirolactam of the rhodamine moiety and the formation of a 1 : 1 1-Hg2+ complex. The limit of detection (LOD) based on was calculated to be 2.8 × 10−8 M, as well as an excellent linear relationship with the concentration of Hg2+ in the range from 0.1 × 10−6 to 1.0 × 10−6 mol/L (). In addition, the effects of pH, coexisting metal ions, and the reversibility were investigated in detail.