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首页> 外文期刊>Chemistry: A European journal >An Ionically Driven Molecular IMPLICATION Gate Operating in Fluorescence Mode
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An Ionically Driven Molecular IMPLICATION Gate Operating in Fluorescence Mode

机译：在荧光模式下运行的离子驱动分子隐含门

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摘要

An asymmetrically core-extended boron-dipyrromethene(BDP)dye was equipped with two electron-donating macrocyclic binding units with different metal ion preferences to operate as an ionically driven molecular IMPLICATION gate.A Na~+-re-sponsive tetraoxa-aza crown ether(R2)was integrated into the extended pi system of the BDP chromophore to trigger strong intramolecular charge transfer(ICT2)fluorescence and guarantee cation-induced spectral shifts in absorption.A dithia-oxa-aza crown (R~1)that responds to Ag~+ was attached to the meso position of BDP in an electronically decoupled fashion to independently control a second ICT_1 process of a quenching nature.The bi-functional molecule is designed in such a way that in the absence of both inputs,ICT_1 does not compete with ICT2 and a high fluorescence output is obtained(In_A = In_B = 0->Out = l).Accordingly,binding of only Ag+ at R1(In_A = l,In_B = 0)as well as complexa-tion of both receptors(In_A = In_B = l)also yields Out = l.Only for the case in which Na~+ is bound at R~2 and R~1 is in its free state does quenching occur,which is the distinguishing characteristic for the In_A = 0 and In_B = 1->Out = 0 state that is required for a logic IMPLICATION gate and Boolean operations such as IF-THEN or NOT.
机译：一个不对称扩核的硼二吡咯亚甲基（BDP）染料配备了两个具有不同金属离子偏好性的给电子大环键合单元，可作为离子驱动的分子IMPLICATION门.Na〜+反应灵敏的四氧杂氮杂冠醚（R2）被集成到BDP生色团的扩展pi系统中，以触发强大的分子内电荷转移（ICT2）荧光并确保阳离子引起的吸收光谱移动。对Ag有反应的二硫杂氧杂氮杂氮杂冠（R〜1） 〜+以电子解耦的方式连接到BDP的介观位置，以独立控制第二个具有淬灭性质的ICT_1过程。双功能分子的设计方式是，在没有两个输入的情况下，ICT_1不会竞争在ICT2的条件下可以获得高荧光输出（In_A = In_B = 0-> Out = 1）。因此，R1处仅Ag +的结合（In_A = 1，In_B = 0）以及两个受体的络合（In_A = In_B = l）也产生Out = l。在Na〜+结合在R〜2且R〜1处于自由状态的情况下会发生淬灭，这是In_A = 0和In_B = 1-> Out = 0状态所需的区别特征。逻辑IMPLICATION门和布尔运算（例如IF-THEN或NOT）。

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