通过超分子有机凝胶体系中的异构体效应调控凝胶形成、分级结构和表面润湿性。

Regulation gel formation, hierarchical structures and surface wettability via isomeride effect in supramolecular organogel system.

机构信息

College of Chemistry and Chemical Engineering & Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Institute for Conservation and Utilization of Agro-Bioresources in Dabie Mountains, Xinyang Normal University, Xinyang 464000, China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.

出版信息

J Colloid Interface Sci. 2017 May 15;494:170-177. doi: 10.1016/j.jcis.2017.01.080. Epub 2017 Jan 25.

DOI:10.1016/j.jcis.2017.01.080

PMID:28157635

Abstract

A new serial of gelators with two cholesteryl groups based on o-phenylenediamine, m-phenylenediamine and p-phenylenediamine were synthesized, and their organogelation ability was evaluated. We found that G-o could form gels in DMF, DMSO and ethyl acetate, G-m and G-p could only gel DMF and 1,4-dioxane. The organogels were thoroughly characterized using various microscopic techniques including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), UV-Vis spectrum, FT-IR spectrum and contact angle. The gelation ability, morphology, self-assembly mode and materials surface wettability all could be tuned via isomeride effect in self-assembly system. Interestingly, superhydrophobic surface was formed via the self-assembly of compound G-p in 1,4-dioxane and exhibited very high adsorption capacity for water. This gel system provided new method for modulation self-assembly process in supramolecular field.

摘要

我们合成了一系列基于邻苯二胺、间苯二胺和对苯二胺的具有两个胆固醇基团的新型凝胶剂，并评估了它们的凝胶能力。我们发现 G-o 可以在 DMF、DMSO 和乙酸乙酯中形成凝胶，G-m 和 G-p 只能使 DMF 和 1,4-二恶烷凝胶化。使用场发射扫描电子显微镜（FESEM）、X 射线衍射（XRD）、紫外可见光谱、傅里叶变换红外光谱和接触角等各种微观技术对有机凝胶进行了彻底的表征。通过在自组装体系中的异构体效应，可以调节凝胶能力、形态、自组装模式和材料表面润湿性。有趣的是，通过化合物 G-p 在 1,4-二恶烷中的自组装形成了超疏水表面，对水表现出非常高的吸附能力。该凝胶体系为超分子领域中调节自组装过程提供了新的方法。