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Synthesis and Properties Study of a Neocuproine Based Fluorescent Sensor for Cu~(2+)

CHANG Ang;WU Shang-rong;LIU Ying;ZHANG Xin;WEI Yong-biao;LI Song-qing;LIU Xiang-jun;SHANGGUAN Di-hua;Colloge of Chemistry,Xiangtan University;Beijing National Laboratory for Molecular Sciences,Key Laboratory of Analytical Chemistry for Living Biosystems,Institute of Chemistry,Chinese Academy of Sciences;  
A new fluorescent probe for copper ion,2,9-bis-benzothiazole-phenanthroline(PDBT),was designed and synthesized based on 2,9-dimethyl-phenanthroline(NCP).Compared with NCP,the fluorescence quantum yield of PDBT increased about 7times.PDBT showed good selectivity to copper ion over other metal ions,and high sensitivity with a low detection limit of 7.9×10-8 mol/L.Copper ion was found to bind PDBT with a stoichiometry of 1∶1.Good recoveries were obtained when the probe used in the determination of copper ion spiked in commercial drinking water.
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