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首页> 外文期刊>Advanced Functional Materials >All-Photonic Molecular XOR and NOR Logic Gates Based on Photochemical Control of Fluorescence in a Fulgimide-Porphyrin-Dithienylethene Triad
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All-Photonic Molecular XOR and NOR Logic Gates Based on Photochemical Control of Fluorescence in a Fulgimide-Porphyrin-Dithienylethene Triad

机译：基于光化学控制的呋喃酰亚胺-卟啉-二噻吩基乙烯三联体的全光子分子XOR和NOR逻辑门。

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摘要

A molecular triad consisting of a porphyrin linked to two photochromes, a fulgimide, and a dithienylethene, is synthesized and studied. When both photochromes are in their visible-light-absorbing forms, excitation of the fulgimide at 470 nm initiates a two-step singlet energy-transfer relay wherein excitation migrates first to the porphyrin and then to the dithienylethene. Photo-isomerization of the dithienylethene to the open form using visible light prevents the second step, and excitation ultimately resides on the porphyrin, which fluoresces. Photoisomerization of the fulgimide eliminates significant absorption by the molecule at 470 nm, and consequently porphyrin excitation by energy transfer. Photoisomerization of each photochrome may be preferentially achieved, allowing access to all four isomeric states of the molecule. These states correspond to the outputs of logic gates, allowing solutions of the triad to perform either NOT-OR (NOR) or exclusive OR (XOR) functions using only optical inputs and outputs.
机译：合成并研究了由卟啉连接到两个光致变色剂，全灭级酰亚胺和二噻吩基乙烯组成的分子三单元组。当两种光致变色颜料均处于可见光吸收形式时，在470 nm处激发富铝酰亚胺会引发两步单重态能量转移中继，其中激发首先迁移至卟啉，然后迁移至二噻吩基乙烯。使用可见光将二噻吩基乙烯光异构化为开放形式阻止了第二步，并且激发最终停留在发出荧光的卟啉上。 fulgimide的光异构化消除了该分子在470 nm处的明显吸收，并因此消除了能量转移引起的卟啉激发。可以优先实现每种光致色素的光异构化，从而允许进入该分子的所有四个异构状态。这些状态对应于逻辑门的输出，从而允许三合会的解决方案仅使用光学输入和输出即可执行“非或”（NOR）或“异或”（XOR）功能。

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