Abstract
Two coumarin formhydrazide compounds as chemosensors for copper ions have been synthesized. The compounds can recognize copper ion with obvious absorption spectral change and fluorescence decrease in aqueous solution. The detection limit of the compound with terminal diethylamino group to Cu2+ in aq.-HEPES buffer acetonitrile (3:7, v/v, pH=7.4) with fluorescence spectra as detected signal is 0.00041μM. One carbonyl and amine group in one sensor molecule may complex with one copper ion to form 1:1 complex.
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