Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur-50603, Malaysia.
Phys Chem Chem Phys. 2013 Feb 7;15(5):1707-14. doi: 10.1039/c2cp43077k.
The electrochemical behaviour of ferrocene (Fc) is investigated in six different deep eutectic solvents (DESs) formed by means of hydrogen bonding between selected ammonium and phosphonium salts with glycerol and ethylene glycol. Combinations of cyclic voltammetry and chronoamperometry are employed to characterise the DESs. The reductive and oxidative potential limits are reported versus the Fc/Fc(+) couple. The diffusion coefficient, D, of ferrocene in all studied DESs is found to lie between 8.49 × 10(-10) and 4.22 × 10(-8) cm(2) s(-1) (these do not change significantly with concentration). The standard rate constant for heterogeneous electron transfer across the electrode/DES interface is determined to be between 1.68 × 10(-4) and 5.44 × 10(-4) cm s(-1) using cyclic voltammetry. These results are of the same order of magnitude as those reported for other ionic liquids in the literature.
研究了六类由选定的铵盐和鏻盐与甘油和乙二醇之间氢键形成的深共晶溶剂（DESs）中二茂铁（Fc）的电化学行为。采用循环伏安法和计时安培法来表征 DESs。报道了相对于 Fc/Fc(+) 电对的还原和氧化电位极限。在所有研究的 DESs 中，二茂铁的扩散系数 D 介于 8.49×10(-10) 和 4.22×10(-8) cm(2) s(-1) 之间（这些值随浓度变化不大）。使用循环伏安法确定了在电极/DES 界面处的异相电子转移的标准速率常数在 1.68×10(-4) 和 5.44×10(-4) cm s(-1) 之间。这些结果与文献中报道的其他离子液体的结果处于同一数量级。
