CAJ | 학술논문

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。
합성료일충수pH치변화구유5충호변분자결구적신형형광소연생물QHF+。통과자외-가견흡수광보연구료불동pH치하QHF+발생전화산생적5충결구적특정보도，병이차위기출설계료이진제라집전로。재을순/수(체적비위1：1)혼합용제체계중，채용등마이적H+혹OH-작위화학수입신호，선취424화490 nm파장하적특정흡광도혹투사솔작위표준역치，통과비교자외-가견흡수광보적변화，평행실현료다개라집문( XOR화INH혹AND화XOR)적운산，모의료이진제전감기화전가기적운행。
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.