论文标题
基于VIologens的电子响应超分子聚合物的聚集和凝胶中的光毒氧化过程
Photoredox Processes in the Aggregation and Gelation of Electron-responsive Supramolecular Polymers Based on Viologens
论文作者
论文摘要
基于VIologen的二置双吡啶基三唑三唑双齿配体在钯离子存在的情况下会自组装到超分子聚合物中，这些聚合物的结构是由坐标键的定向形成而施加的。这些电子响应性超分子材料的光辐照触发了光诱导的电子传递，产生了孤立的π激--激进物和自由基的二聚体。光递增事件和相关的二聚步骤触发了超分子网络内发生的大规模重组，该网络在辐射条件（功率，持续时间）中产生聚集体或凝胶。进行了详细的电化学，光谱电化学和光化学分析，以了解这些光诱导的聚集和凝胶化中的木桩机制。
Viologen-based ditopic bis-pyridinyl-triazole bidentate ligands self-assemble in the presence of palladium ions into supramolecular polymers whose structure is imposed by the directed formation of coordination bonds. Light-irradiation of these electron-responsive supramolecular materials triggers a photo-induced electron transfer yielding isolated π-radicals and dimers of radicals. The photoreduction events and the associated dimerization steps trigger a large-scale reorganization occurring within the supramolecular network yielding aggregates or gels depending on the irradiation conditions (power, duration). Detailed electrochemical, spectro-electrochemical and photochemical analyses were conducted to understand the mechanisms at stakes in these light-induced aggregation and gelation.
