基于荧光素衍生物单分子器件的二进制全减器和全加器  

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

作　　者：田涛[1] 刘畅[1] 何松[1] 曾宪顺[1] 

机构地区：[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

出　　处：《高等学校化学学报》2015年第2期260-266,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21272172;21074093);天津市自然科学基金(批准号:12JCZDJC21000)资助~~

摘　　要：合成了一种随p H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p H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490nm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.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 un-der 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 absor-bance intensity or transmittance percentage was more than the threshold value, the output signal was 1. Other-wise, 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.

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 

分 类 号：O626[理学—有机化学]