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Synthesis and characterization of a novel, ditopic, reversible and highly selective, 'Turn-On' fluorescent chemosensor for Al3+ ion

机译:新型,对位,可逆和高选择性,“开启”的Al3 +离子荧光化学传感器的合成与表征

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摘要

We herein report a structurally characterized Schiff base ligand, L, formed by the condensation of 1,1-bis-[2-hydroxy-3-acetyl-5-methylphenyl]methane with 2-picolyl amine. It utilizes the three signalling mechanisms, ESIPT, chelation enhanced fluorescence (CHEF) and C=N isomerization, to serve as a "Turn-On" fluorescence chemosensor for Al3+. L has high selectivity for Al3+ in MeOH. The reversible nature of this chemosensor makes it cost effective. It joins the rare family of ditopic fluorescent chemosensors. When this Schiff base receptor was treated with Al3+ salt in MeOH, the fluorescence intensity abruptly increased. Other metal ions did not show such a significant effect on the fluorescence. The detection limit for this chemosensor was found to be 0.7 mu M.
机译:我们在本文中报道了通过1,1-双-[2-羟基-3-乙酰基-5-甲基-5-甲基苯基]甲烷与2-甲基吡啶胺的缩合形成的结构特征的席夫碱配体L。它利用ESIPT,螯合增强荧光(CHEF)和C = N异构化这三种信号传导机制,充当Al3 +的“开启”荧光化学传感器。 L对MeOH中的Al3 +具有很高的选择性。这种化学传感器的可逆特性使其具有成本效益。它加入了稀有的二位荧光化学传感器家族。当此Schiff碱受体在MeOH中用Al3 +盐处理时,荧光强度突然增加。其他金属离子对荧光没有显着影响。该化学传感器的检出限为0.7μM。

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