Conductive metal–organic frameworks can provide unique porous structures, large pore volumes, many catalytically active sites and high crystallinity, and so are becoming increasingly important and attractive as electrocatalytic materials. The present work synthesized nanorods of the conductive compound Ni₃(2,3,6,7,10,11-hexaiminotriphenylene)₂ (Ni₃(HITP)₂) with a high degree of crystallinity from HITP ligands and Ni²⁺ ions. Screen-printed electrodes made with this material were employed to fabricate an enzyme-free sensor for the detection of ascorbic acid (AA). The sensor exhibited good catalytic activity during the electrocatalytic analysis of AA in alkaline media, attributed to the synergistic effect of highly active Ni-N₄ catalytic sites in the nanorods, the two-dimensional superimposed honeycomb lattice of the Ni₃(HITP)₂, and the large specific surface area of this material. The latter property facilitated efficient electron transfer during catalytic oxidation. A portable electrochemical AA detection system was developed using Ni₃(HITP)₂ as the electrode material together with application-specific integrated circuits and a smartphone application with App. Good sensing performance was obtained, including a wide linear range (2–200 μM) with high sensitivity (0.814 μA μM⁻¹ cm⁻²), and low detection limit (1 μM). This system can be used to monitor AA levels and trends in sweat to assess vitamin C intake as a part of personal health management.

导电金属有机框架可以提供独特的多孔结构、大孔体积、许多催化活性位点和高结晶度，因此作为电催化材料变得越来越重要和有吸引力。本工作从 HITP 配体和 Ni ^{2+合成了具有高结晶度的导电化合物 Ni} ₃ (2,3,6,7,10,11-hexaiminotriphenylene) ₂ (Ni ₃ (HITP) _{2 ) 的纳米棒。}离子。使用这种材料制成的丝网印刷电极用于制造用于检测抗坏血酸 (AA) 的无酶传感器。该传感器在碱性介质中 AA 的电催化分析过程中表现出良好的催化活性，这归因于纳米棒中高活性 Ni-N _{4催化位点、Ni 3} (HITP) ₂的二维叠加蜂窝晶格的协同作用，以及这种材料的大比表面积。后一种性质促进了催化氧化过程中的有效电子转移。使用 Ni ₃ (HITP) _{2开发了一种便携式电化学 AA 检测系统}作为电极材料与专用集成电路和带有 App 的智能手机应用程序一起使用。获得了良好的传感性能，包括具有高灵敏度（0.814 μA μM ^-1 cm ^-2）和低检测限（1 μM）的宽线性范围（2-200 μM）。该系统可用于监测 AA 水平和汗液趋势，以评估维生素 C 的摄入量，作为个人健康管理的一部分。