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首页> 外文期刊>Crystal growth & design >Solvent-induced polymorphic nanoscale transitions for 12- hydroxyoctadecanoic acid molecular gels
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Solvent-induced polymorphic nanoscale transitions for 12- hydroxyoctadecanoic acid molecular gels

机译:溶剂诱导的12-羟基十八烷酸分子凝胶的多态性纳米级跃迁

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摘要

12-Hydroxyoctadecanoic acid (12HSA) molecular gels have been reported to form self-assembled fibrillar network (SAFiNs) in organic solvents. For the first time, different polymorphic forms for 12HSA molecular gels have been reported. 12HSA, in alkanes and thiols, have a hexagonal subcell spacing (4.1 ?) and are arranged in a multilamellar fashion with a distance greater than the bimolecular length of 12HSA (54 ?). This polymorphic form corresponded to SAFiN with CGC less than 1 wt %. 12HSA, in nitriles, aldehydes, and ketones, have a triclinic parallel subcell (4.6, 3.9, and 3.8 ?) and interdigitation of the lamellar structure (38-44 ?). This polymorphic form corresponds to a less effective sphereultic supramolecular crystalline network, which immobilizes solvents at CGC greater than 1.5 wt %.
机译:据报道,12-羟基十八烷酸(12HSA)分子凝胶在有机溶剂中形成自组装的原纤维网络(SAFiN)。首次报道了12HSA分子凝胶的不同多晶型物。链烷烃和硫醇中的12HSA具有六边形的子电池间距(4.1?),并且以多层形式排列,其距离大于12HSA的双分子长度(54?)。该多晶型形式对应于CGC小于1重量%的SAFiN。在腈,醛和酮中的12HSA具有三斜晶系平行亚细胞(4.6、3.9和3.8?)和层状结构(38-44?)的叉指状。该多晶型形式对应于不太有效的球状超分子晶体网络,其将溶剂固定在大于1.5wt%的CGC处。

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