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A naphthalene-based colorimetric and fluorometric dual-channel chemodosimeter for sensing cyanide in a wide pH range

机译:基于萘基的比色和荧光双通道化学计,用于在宽的pH范围内进行氰化物

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摘要

A novel alpha-ethoxynaphthalene-dicyanovinyl conjugate 1 with an intramolecular charge transfer (ICT) characteristic was synthesized for the highly selective and reactive detection of CN- in a wide pH range of 3-10. The colorimetric and fluorometric response of the sensor to CN- is attributable to the addition of CN- to the beta-conjugated position of the dicyanovinyl group of 1, which blocks ICT. The sensing mechanism is supported by H-1 NMR titration experiments and density functional theory (DFT) calculations. Moreover, chemodosimeter 1 shows strong yellow fluorescence in the solid-state, and 1-based test strips can be easily prepared at low-cost and can be used in practical and efficient test kits for CN- detection. The results provide the proof of concept that the ICT-based colorimetric and fluorometric cyanide-selective chemodosimeter can be created based on a simple alkoxy-substituted small molecule.
机译:具有分子内电荷转移(ICT)特性的新型α-乙醇萘二丙二烷基缀合物1用于CN-在3-10的宽pH范围内的高选择性和反应性检测。 传感器对CN的比色和荧光响应可归因于将CN-与β-缀合的位置的加入1的1,其阻断ICT。 通过H-1 NMR滴定实验和密度泛函理论(DFT)计算支持传感机制。 此外,Chemodosimeter 1显示了固态的强黄色荧光,并且可以以低成本容易地制备1种基试带,并且可以用于实际和有效的测试试剂盒中的CN-检测。 结果提供了概念证明,即可以基于简单的烷氧基取代的小分子产生基于ICT的比色测定和荧光氰选择剂化学计。

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