Dendritic Physical Gels: Structural Parameters for Gelation with Peptide-Core Dendrimers
作者:Woo-Dong Jang、Takuzo Aida
DOI:10.1021/ma034221b
日期:2003.11.1
Den-Phe-Ala-OMe (Figure 1) were found to form physical gels with critical concentrations for gelation of 1.0−2.2 mM, whereas C-dendronized Boc-Phe-Ala-ODen and Phe-Ala-ODen were unable to induce gelation. FE-SEM micrographs of the dry gels showed the presence of fibrous or ribbonlike self-assembled structures, which melted at 112−214 °C (Tm), depending on the modes of hydrogen bonding and van der Waals interactions
合成了11种不同的肽核树突状大分子,每一个在肽侧链,N端或C端均具有[G2]聚(苄基醚)树突楔(Den),并且它们作为大分子有机胶凝剂的潜力在MeCN中进行了调查。在这些候选物中,侧链-Dendronized Boc-Tyr(Den)-Ala和环-(Tyr(Den)-Ala)和N-Dendronized Den-Phe-Ala和Den-Phe-Ala-OMe(图1)是发现形成凝胶的物理凝胶的临界浓度为1.0-2.2 mM,而C-齿化的Boc-Phe-Ala-ODen和Phe-Ala-ODen不能诱导凝胶化。干凝胶的FE-SEM显微照片显示存在纤维状或带状自组装结构,该结构在112-214°C(T m),取决于氢键和范德华相互作用的模式。干凝胶的红外光谱和X射线衍射分析表明,Boc-Tyr(Den)-Ala和Den-Phe-Ala-OMe的柱状分子排列具有矩形堆积几何形状,而Den-Phe-