高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (2): 260.doi: 10.7503/cjcu20140668

• 有机化学 • 上一篇    下一篇

基于荧光素衍生物单分子器件的二进制全减器和全加器

田涛, 刘畅, 何松, 曾宪顺()   

  1. 天津理工大学材料科学与工程学院, 显示材料与光电器件省部共建教育部重点实验室, 天津 300384
  • 收稿日期:2014-07-18 出版日期:2015-02-10 发布日期:2015-01-22
  • 作者简介:联系人简介: 曾宪顺, 男, 博士, 研究员, 博士生导师, 主要从事主-客体化学和超分子化学研究. E-mail: xshzeng@tjut.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21272172, 21074093)和天津市自然科学基金(批准号: 12JCZDJC21000)资助

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)

摘要:

合成了一种随pH值变化具有5种互变分子结构的新型荧光素衍生物QHF+. 通过紫外-可见吸收光谱研究了不同pH值下QHF+发生转化产生的5种结构的特征谱图, 并以此为基础设计了二进制逻辑电路. 在乙醇/水(体积比为1∶1)混合溶剂体系中, 采用等摩尔的H+或OH-作为化学输入信号, 选取424和490 nm波长下的特定吸光度或透射率作为标准阈值, 通过比较紫外-可见吸收光谱的变化, 平行实现了多个逻辑门(XOR和INH或AND和XOR)的运算, 模拟了二进制全减器和全加器的运行.

关键词: 荧光素, 分子逻辑门, 紫外-可见吸收光谱, 全减器, 全加器

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

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