Electrochemical characterization of nitrocoumarin-modified nanostructured electrode platforms: New precursors for the electrocatalysis of NADH
作者:R. Moscoso、C. Barrientos、S. Abarca、J.A. Squella
DOI:10.1016/j.electacta.2023.141933
日期:2023.3
to the withdrawing electron effect exerted by the cinnamoyl carbonyl group. The heterogeneous transfer rate constant, kh, was calculated for all of the redox mediators, and they decreased in the order 4-CinCoum> 3-CinCoum> 6-Coum> 4-Cin-6-Coum (II). On the other hand, we observed no significant differences for retention of the redox pairs ArNHOH/ArNO from the nitrocoumarin precursor compounds on the
所有合成的硝基香豆素、3-acetyl-6-nitrocoumarin 6-Coum、3-(3-nitrocinnamoyl)-coumarin 3-CinCoum、3-(4-nitrocinnamoyl)-coumarin 4-CinCoum和 3-(4-nitrocinnamoyl)- 6-硝基香豆素4-Cin-6-Coum用于生成新型纳米结构多壁碳纳米管 (MWCNT) 电极平台,这些平台可电化学激活以生成氧化还原对 ArNHOH/ArNO。该氧化还原对能够充当 NADH 氧化电催化中的介质。 硝基香豆素修饰的纳米结构电极平台是使用滴铸法和巴克纸 (BP) 法制备的,用于比较目的,它们的电化学响应没有差异。 据观察,最容易还原的化合物是 4-Cin-6-Coum。由于肉桂酰羰基的吸电子效应,还原首先发生在 4-硝基肉桂酰基。 计算了所有氧化还原介体的异质转移速率常数 k h,它们按 4-CinCoum>