Small molecular gelators are a class of compounds with potential applications for soft biomaterials. Low molecular weight hydrogelators are especially useful for exploring biomedical applications. Previously, we found that 4,6-O-benzylidene acetal protected D-glucose and D-glucosamine are well-suited as building blocks for the construction of low molecular weight gelators. To better understand the scope of D-glucosamine derivatives as gelators, we synthesized and screened a novel class of N-acetylglucosamine derivatives with a p-methoxybenzylidene acetal protective group. This modification did not exert a negative influence on the gelation. On the contrary, it actually enhanced the gelation tendency for many derivatives. The introduction of the additional methoxy group on the phenyl ring led to low molecular weight gelators with a higher pH responsiveness. The resulting gels were stable at neutral pH values but degraded in an acidic environment. The release profiles of naproxen from the pH responsive gels were also analyzed under acidic and neutral conditions. Our findings are useful for the design of novel triggered release self-assembling systems and can provide an insight into the influence of the the structure on gelation.
小分子凝胶剂是一类具有软
生物材料潜在应用的化合物。低分子量
水凝胶剂特别适用于探索
生物医学应用。我们先前发现,4,6-
O-苄基亚甲基保护的
D-葡萄糖和D-葡萄
氨是构建低分子量凝胶剂的理想基元。为了更好地了解D-葡萄
氨衍
生物作为凝胶剂的范围,我们合成并筛选了一类新型的
N-乙酰
葡萄糖胺衍
生物,其中含有一个
p-甲氧基苄亚甲基保护基团。这种修饰对凝胶化没有负面影响,相反,它实际上增强了许多衍
生物的凝胶化倾向。在苯环上引入额外的甲氧基团导致低分子量凝胶剂具有更高的pH响应性。由此形成的凝胶在中性pH值下稳定,但在酸性环境中降解。还分析了pH响应凝胶中
萘普生的释放特性,在酸性和中性条件下进行了分析。我们的研究结果对于设计新型的受触发释放自组装系统非常有用,并且可以深入了解结构对凝胶化的影响。