Laboratoire de Chimie des Polymères Organiques (LCPO), University of Bordeaux, CNRS, Bordeaux INP, 33600 Pessac, France.
Solvay-GBU Aroma Performance, Research and Innovation-Centre de Lyon (RICL), 69192 Saint Fons, France.
Molecules. 2022 Jun 28;27(13):4138. doi: 10.3390/molecules27134138.
The synthesis of π-conjugated polymers via an environmentally friendly procedure is generally challenging. Herein, we describe the synthesis of divanillin-based polyazomethines, which are derived from a potentially bio-based monomer. The polymerization is performed in 5 min under microwave irradiation without any metallic catalyst, with water as the only by-product. The vanillin-based polyazomethines were characterized by SEC, TGA, and UV-Vis spectroscopy. Model compounds were designed and characterized by X-ray diffraction and UV-Vis spectroscopy. The structure/properties study of vanillin-based azomethines used as models allowed us to unequivocally confirm the E configuration and to highlight the cross-conjugated nature of divanillin-based polymers.
通过环保的方法合成π共轭聚合物通常具有挑战性。在此，我们描述了基于二香草醛的聚亚胺的合成，其源自潜在的生物基单体。聚合在微波辐射下 5 分钟内进行，无需任何金属催化剂，水是唯一的副产物。基于香草醛的聚亚胺通过 SEC、TGA 和 UV-Vis 光谱进行了表征。设计并通过 X 射线衍射和 UV-Vis 光谱对模型化合物进行了表征。作为模型使用的基于香草醛的亚胺的结构/性能研究使我们能够明确确认 E 构型，并强调基于二香草醛的聚合物的交叉共轭性质。
