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A novel fluorescent sensor (L) based on 1,8-naphthalic anhydride has been developed which can selectively detect Cu2+ in CH3CN medium over other metal ions at 408 nm in the fluorescence spectra. When Cu2+ was added into L, L showed fluorescent turn-off by coordinating with Cu2+. A fresh absorption band was found at the position of 290 nm as was a red-shifted absorption band from 356 nm to 376 nm in...
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