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A novel fluorescent sensor for Zn2+ based on 8-oxalamidoquinoline (OAQ) was designed and synthesized. OAQ behaves high selectivity to Zn2+ accompanied by remarkable emission enhancement (32 folds) at 490nm upon binding Zn2+ in buffer aqueous solution at pH 7.2. The results show that a 1:1 complex was formed and the apparent association constant of OAQ/Zn2+ complex was calculated to be 2.5×105M−1....
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