Cu

背景：近年来，开发用于测定饮料和其他相关来源中咖啡因含量的高效电极材料变得至关重要。在这项工作中，首次制备了一种基于碳化 Cu-4,4'-联吡啶-三苯并三联金属有机骨架 (CBT-MOF) 的新型电化学传感器，并通过各种表面分析技术对其进行了表征，并用于有效的咖啡因的感觉。

方法：采用简单的溶剂热法制备铜-4,4'-联吡啶-均苯三甲酸交联MOF（CBT-MOF），并在不同温度下碳化。重要发现 CBT-500 的优越性可能与通过在 500 °C 下提高碳化温度来提高氧化铜纳米粒子的电导率有关。这增强了分析物和氧化铜纳米颗粒之间的电子转移动力学。温度升高到 500 °C 以上（CBT-600 和 CBT-700）会导致电导率降低，从而降低电极/电解质界面之间的电子转移动力学。正如预期的那样，在制造的电极材料上对咖啡因的电流检测提供了从 1 到 10 μM 的线性动态范围，具有低检测限和更高的灵敏度，分别为 0.0190 μM 和 0.0848 mA μM-1厘米-2。此外，制造的电极材料保持稳定，为分析咖啡样品中的咖啡因提供了一种很有前景的传感器材料。

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Background: In recent times, development of an efficient electrode material for the determination of caffeine content in beverages and other related sources becomes essential. In this work, for the first time, a novel electrochemical sensor based on carbonized Cu-4,4’-bipyridine-trimesic interlinked metal-organic framework (CBT-MOF) was prepared, characterized by various surface analytical techniques and employed for the effective sensing of caffeine.

Method: Copper-4,4’-bipyridine-trimesic acid interlinked MOF (CBT-MOF) was prepared by simple solvo-thermal method and it was carbonized at different temperatures. Significant findings The superiority of CBT-500 may be associated with rise in the Conductivity of the copper oxide nanoparticles by increasing the carbonizing temperature at 500 °C. which enhances the electron transfer kinetics between the analyte and the copper oxide nanoparticle. Increase in temperature above 500 °C, (CBT-600 and CBT-700), results in lower conductivity, thereby decreasing the electron transfer kinetics between the electrode/electrolyte interface. As expected, the amperometric detection of caffeine on fabricated electrode material provided a linear dynamic range from 1 to 10 μM with a low detection limit and higher sensitivity of 0.0190 μM and 0.0848 mA μM−1 cm−2. Further, the fabricated electrode material remained stable, leading to a promising sensor material for the analysis of caffeine in coffee samples.