A molecular half-subtractor based on a fluorescence and absorption dual-modal sensor for copper ions

A L-phenyl alanine derivative (L) could be used as a fluorescence and absorption dual-modal sensor, which was highly sensitive and selective to copper ion at physiological pH. We have drawn attention to the use of its copper complex to acquire a half-subtractor with parallel operating INHIBIT and XOR logic gates, by monitoring, fluorescence and absorbance as Output Signals, respectively. (C) 2008 Elsevier Ltd. All Fights reserved.