The electrochemical properties of a number of coordination compounds of iron(II) with 4-amino-1,2,4-triazole (NH₂trz), which have a sharp thermally induced spin crossover with hysteresis on the temperature curves of the effective magnetic moment dependence, were studied using method cyclic voltammetry (CV) at 298 K. The complexes were mixed with carbon powder and silicon oil and included in the paste electrode. The measurements were made in solutions of 0.10 M KNO₃. It was found that the area 0.5–0.6 V and 0.3–0.4 V contains the anode and cathode current peaks of freshly prepared paste electrodes. In all cases, the redox process in the paste is quasi-reversible. At the same molar concentration of complexes in the paste (0.1 mol kg⁻¹), a number of current peaks depends on the nature of the anion. The peak current value correlates with the calculated fraction of the high spin form in the solid phase of the complex and the temperature of the direct spin crossover (when heated, T_c↑). The magnetic properties of Fe(NH₂trz)₃(NO₃)₂ complex, its mixture with carbon powder and the paste were measured by Faraday method in a temperature range 80–370 K. The effective magnetic moment was depended on changes in variations in the environment of the molecules of the complex in the studied samples.

中文翻译：

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具有自旋交叉的4-氨基-1,2,4-三唑铁(II)配合物的电化学研究

铁 (II) 与 4-氨基-1,2,4-三唑 (NH ₂ trz)的许多配位化合物的电化学性质，它们在有效磁的温度曲线上具有急剧的热诱导自旋交叉和滞后现象。矩依赖性，使用循环伏安法 (CV) 在 298 K 下进行研究。将配合物与碳粉和硅油混合并包含在糊状电极中。测量是在 0.10 M KNO _{3 的}溶液中进行的。发现 0.5-0.6 V 和 0.3-0.4 V 区域包含新制备的糊状电极的阳极和阴极电流峰值。在所有情况下，浆料中的氧化还原过程是准可逆的。在糊状物中配合物的摩尔浓度相同 (0.1 mol kg ^-1)，电流峰值的数量取决于阴离子的性质。峰值电流值与复合物固相中高自旋形式的计算分数和直接自旋交叉的温度（加热时，T _c ↑）相关。Fe(NH ₂ trz) ₃ (NO ₃ ) _{2 配合}物、其与碳粉的混合物和糊状物的磁性能通过法拉第法在80-370 K的温度范围内测量。有效磁矩取决于变化的变化在研究样品中复合物分子的环境中。