Self-assembly of a sugar-based gelator in water: Its remarkable diversity in gelation ability and aggregate structure
Self-assembly of a sugar-based gelator in water: Its remarkable diversity in gelation ability and aggregate structure
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DOI：
10.1021/la0109516
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发表时间：
2001-11-13
期刊：
影响因子：
3.9
通讯作者：
Shimizu, T
中科院分区：
文献类型：
--
作者：
Jung, JH;John, G;Shimizu, T
合成了一种新型糖基凝胶因子1，并对其在有机溶剂和水中的凝胶能力进行了评价。非常令人惊讶地，发现1使有机溶剂以及水胶凝，表明1可以充当两亲胶凝剂。我们使用SEM、TEM、NMR、III和XRD表征了来自1的水凝胶的超结构。水性凝胶1形成具有20-500 nm直径的褶皱原纤维的三维网络。此外，手性聚集体被发现是很大程度上扭曲的螺旋带与约。85 nm宽，约。315 nm间距，和高达几微米的长度，其螺旋度是专门左手。XRD图表明，水凝胶1保持具有2.90 nm长程间距的双层结构。这给出了形成良好有序的基于双层的水性凝胶的第一个实例。XRD、FT-NMR和FT-IR结果表明，水凝胶1通过氢键、π-π相互作用和疏水力的组合而稳定。
A new sugar-based gelator 1 was synthesized, and its gelation ability was evaluated in organic solvents and water. Very surprisingly, 1 was found to gelate organic solvents as well as water, indicating that 1 can act as an amphiphilic gelator. We characterized on superstructures of an aqueous gel from 1 using SEM, TEM, NMR, III, and XRD. The aqueous gel 1 formed a three-dimensional network with 20-500 nm diameter puckered fibrils. In addition, the chiral aggregate was found to be largely twisted helical ribbons with ca. 85 nm width, ca. 315 nm pitch, and up to several micrometer length, whose helicity was exclusively left-handed. XRD diagrams indicate that an aqueous gel 1 maintains a bilayered structure with 2.90 nm long-range spacing. This gives the first example of the formation of well ordered bilayer-based aqueous gel. The XRD, FT-NMR, and FT-IR results suggested that the aqueous gel 1 is stabilized by a combination of the hydrogen bonding, pi-pi interactions, and hydrophobic forces.