Towards hybrid carbazole/pyrrole-based carboxylated monomers: chemical synthesis, characterisation and electro-oxidation properties
作者:Jean-Paul Lellouche、Zvika Pomerantz、Subrata Ghosh
DOI:10.1016/j.tetlet.2011.10.047
日期:2011.12
Six novel hybrid carbazole (Cbz)–pyrrole (Pyr)-based carboxylated monomers were synthesised and unambiguously characterised using common spectroscopic tools. Clauson-Kaas, amide coupling, LAH (lithium aluminium hydride)-mediated reduction, esterification and debenzylation reactions were used as key chemical reactions towards their multi-step synthesis. The electro-oxidation features of all these six
合成了六种新颖的杂咔唑(Cbz)-吡咯(Pyr)基羧化单体,并使用常用的光谱学工具对其进行了明确表征。Clauson-Kaas,酰胺偶联,LAH(氢化铝锂)介导的还原,酯化和脱苄基反应被用作实现多步合成的关键化学反应。所有这六个杂种的电氧化特征研究了Cbz / Pyr单体对相应的聚COOH导电涂层的电沉积。非常有趣的是,由于这种可电氧化的单体同时包含两种类型的可氧化杂环,即Pyr和Cbz物种,因此发现这些杂化Cbz / Pyr单体的成功电聚合反应高度依赖于相应单体中Cbz与Pyr单元的相对数量。实际上,仅对于特征为Cbz / Pyr单元比大于或等于1的杂化单体,才观察到将相应的导电聚合物薄膜成功电沉积到工作的Pt电极上。通过适当的化学设计和单体多步合成,系统地调节单体中存在的可氧化Cbz和Pyr单元的数量,已验证了该结果。在这种情况下,循环伏安图分析很容易就证实了电沉积的唯一性。在进行polyCbz