Abstract A new rhodamine-anthraquinone based “off–on-off” colorimetric and fluorimetric sensor was designed, synthesized and characterized by 1H, 13C NMR and Mass spectrometric techniques. It was found out to be sensitive and selective towards Al3+ without any interference from other competitive metal ions. Dyad 1 did not display any emission but on treating with Al3+ fluorescence enhancement at 587 nm was observed. Dyad 1 formed a stable 1:1 complex with Al3+ ions with a binding constant of 7.07 × 104 M−1 and was able to detect Al3+ ions with lowest detection limit of 0.2 µM. The complex 1.Al3+ was further tested for its reversibility by treating it with different anions. The emission of 1.Al3+ was quenched only in the presence of CN− ions. Based on this result, molecular logical circuits were constructed with a combination of AND, OR, NOT, NOR gates. The capability of dyad 1 to detect Al3+ in real time sample was also achieved.

中文翻译：

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基于罗丹明-蒽醌的二元组用于 Al3+ 的快速和选择性传感，具有实时采样和分子逻辑电路的潜在应用

摘要 设计、合成了一种新的基于罗丹明-蒽醌的“关-开-关”比色和荧光传感器，并通过 1H、13C NMR 和质谱技术对其进行了表征。发现它对 Al3+ 具有敏感性和选择性，而不受其他竞争性金属离子的干扰。Dyad 1 没有显示任何发射，但在 587 nm 处观察到 Al3+ 荧光增强。Dyad 1 与 Al3+ 离子形成稳定的 1:1 复合物，结合常数为 7.07 × 104 M-1，能够以 0.2 µM 的最低检测限检测 Al3+ 离子。通过用不同的阴离子处理配合物 1.Al3+ 进一步测试其可逆性。1.Al3+ 的发射仅在 CN- 离子存在时被淬灭。基于这个结果，分子逻辑电路是用AND、OR、NOT、或非门。还实现了 dyad 1 在实时样品中检测 Al3+ 的能力。