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Synthesis and properties of a new green water‐soluble polymer for proton and metal‐cation sensing
Author(s) -
Hu Yulin,
Wang Baoyan,
Su Zhixing
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29215
Subject(s) - aqueous solution , fluorescence , polymer , metal , chemistry , proton , materials science , polymer chemistry , inorganic chemistry , nuclear chemistry , organic chemistry , physics , quantum mechanics
A novel water‐soluble colored polymer, based on 1,8‐naphthalimide, was synthesized through a series of easy reactions with high yields. It emitted green fluorescence both in an aqueous solution and in a solid state. Fluorescence characteristics of the polymer as a function of pH were investigated in aqueous solutions. The polymer solution showed weaker fluorescence in a more acidic medium. When the pH of the solution was higher than 5, stronger fluorescence could be seen with a p K a value of 3.5. The presence of metal cations (Mn 2+ , Fe 3+ , Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+ ) could quench the fluorescence intensity of an aqueous solution of this polymer to different levels. It was highly sensitive to Cu 2+ and Fe 3+ present in the studied system. The results suggest that this newly synthesized compound could work as a polymeric sensor responding to water polluted by Cu 2+ , Fe 3+ , and protons. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009