Chem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (2): 260.doi: 10.7503/cjcu20140668

• Organic Chemistry • Previous Articles     Next Articles

Molecular Full-adder and Full-subtractor Logic Circuit Based on Fluorescein Derivatives

TIAN Tao, LIU Chang, HE Song*, ZENG Xianshun*()   

  1. Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China
  • Received:2014-07-18 Online:2015-02-10 Published:2015-01-22
  • Contact: HE Song,ZENG Xianshun E-mail:xshzeng@tjut.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21272172, 21074093) and the Tianjin Municipal Natural Science Foundation, China(No.12JCZDJC21000)

Abstract:

Over the past decade, there has been significant progress in the development of molecular compu-ter, which has inspired scientists to construct appropriate molecular systems that could integrate simple logic gates into combinatorial circuits. In this work, a novel fluorescein-based QHF+ with five-state molecular switch was synthesized. The conversion of the five states of QHF+ was observed by UV-visible absorption spectra under various pH values in CH3CH2OH/H2O(volume ratio 1∶1). Spectral responses with the use of chemical inputs in the form of H+ and OH- revealed that QHF could function as a combinatorial logic circuit(XOR gate and INHIBIT gate, AND gate and XOR gate). Absorbance change at 424 and 490 nm or transmittance change at 424 nm, was monitored as output signals with threshold value of A=0.209(or T=61.8%). When absorbance intensity or transmittance percentage was more than the threshold value, the output signal was 1. Otherwise, the output value was 0. In conclusion, a full-subtractor was achieved by setting the initial state to QHF0 with outputs at 424 and 490 nm in the absorption mode, while a molecular full-adder was provided by setting the initial state to QHF+ and observing both absorbance at 490 nm and transmittance at 424 nm.

Key words: Fluorescein, Molecular logic circuit, UV-vis absorption spectrum, Full-subtractor, Full-adder

CLC Number: 

TrendMD: