中文摘要：

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。

英文摘要：

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.