【作者】 刘健；

【导师】 焦体峰；

【作者基本信息】 燕山大学 ， 化学工程， 2012， 硕士

【摘要】 席夫碱衍生物是设计两亲分子与有序组装体系的一类重要的有机化合物，而基于两亲分子而设计的凝胶材料在生物医药以及功能材料领域都有应用。基于这两点，本文在前人工作基础上，设计合成表征了引入不同取代基团的席夫碱化合物及基于谷氨酸衍生物的席夫碱化合物，同时也制备了以吡啶类和谷氨酸衍生物为基础的两类混合凝胶，研究了它们的胶凝行为，并采取多种方法对干凝胶进行了表征。对四种L-谷氨酸席夫碱化合物研究结果表明，席夫碱化合物分子上的C=N双键会和分子上邻位的羟基之间产生氢键作用力，同时，引入C长链或稠环对席夫碱化合物的紫外光谱的吸收及热稳定性有明显的影响。分子结构的不同和取代基团的不同会造成热稳定性的差异。对两种配体及金属配合物的研究结果表明不同的金属离子配位到了C=N上的N原子和OH上的O原子上。不同取代基团和不同金属离子配位对化合物在紫外光谱中的吸收有影响。金属配合物的热稳定性明显低于配体的热稳定性，可以通过设计不同结构的配体或者选择不同的过渡金属离子配位来改变所合成配合物的热稳定性。此外，我们制备了几种吡啶衍生物和几类酸在不同有机溶剂中的混合凝胶及谷氨酸二乙酯衍生物和几类酸在不同溶剂中的混合凝胶。对这两类混合凝胶的胶凝行为及干凝胶的研究结果表明，改变分子结构的形状，分子中取代基团的种类和溶剂，均会影响到这些二元凝胶的形成，性质及结构。吡啶衍生物的分子结构和取代基团对胶凝行为和凝胶分子组装有重要的影响。水和乙醇混合溶液的比例对胶凝行为及干凝胶的表面形貌有一定的影响。在这些二元混合凝胶中确实形成了氢键，并且氨基和羧基之间形成的氢键作用力和范德华力是这些有机凝胶形成的主要的推动力。这些作用力使溶剂分子填充在三维网络结构中并保证网络结构的不塌陷。更多还原

【Abstract】 Schiff base derivatives are most important organic compounds using designingbifunctional amphiphile and organized assembly system. Schiff base derivatives play animportant role in biological system and functional material fields. Based on the previouswork, we designed and characterized two aromatic schiff base derivatives and thecorresponding metal complexes with different substituted groups and four novelL-glutamate-based Schiff base compounds with glutamate segment and differentsubstituted groups. And we studied the gelation behaviors of binary trigonal acids andbipyridine derivatives mixtures in various organic solvents and L-glutamate aminederivatives and acids in different solvents.The research for four novel L-glutamate-based Schiff base compounds showshydrogen bonds between C=N and hydroxyl. Alkyl chains in molecular structures affectUV spectra. These results indicate that the the special properties of Schiff base compoundscould be regulated through the design of molecular structures and substituted groups.The research for two aromatic schiff base derivatives and the corresponding metalcomplexes indicate that the nitrogen atom in imino group and oxygen atom in phenolichydroxyl group participate in coordinating with transition metal ion in different bridgedmode. Different coordination modes between metal ions and ligands can affect UV spectra.The thermal stability of metal complexes had been obviously superior to that of theligands.The research for gelation behaviors shows that the molecular shapes and substituentgroups in these compounds play an important role in the gelation behavior of thecompounds. Bipyridine derivatives have also play an important role in changing thegelation behaviors and assembly states. The rate of water and ethanol also affect thegelation behavior of mixture compounds. The results indicate that there are hydrogenbonds and vander Waals interaction in new binary mixed organogelators between amineand carboxyl. Solvent is trapped into three-dimensional (3D) networks by hydrogen bondsand vander Waals interaction.更多还原