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Unveiling the hydrogen bonding network in liquid crystalline natural-based glycosides containing polymeric complexes: experimental and theoretical assessment
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 5.2 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.colsurfa.2020.124685 Nurul Fadhilah Kamalul Aripin , Jonathan Maclean Heap , Rafael Piñol , Vijayan Manickam-Achari , Alfonso Martinez-Felipe
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 5.2 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.colsurfa.2020.124685 Nurul Fadhilah Kamalul Aripin , Jonathan Maclean Heap , Rafael Piñol , Vijayan Manickam-Achari , Alfonso Martinez-Felipe
Abstract In this work we present a facile and versatile strategy to prepare new amphiphilic compounds obtained from natural sources, avoiding costly covalent synthetic stages, and we introduce a powerful methodology to describe hydrogen-bonding networks in carbohydrates liquid crystals A series of new glycosides has been prepared by mixing a natural-based mannoside, αManPKO, with three different polymeric substrates: poly(ethylene oxide), PEG, poly(4-vinyl pyridine), P4VP, and a block-copolymer containing PEG and P4VP segments, PEG45-b-P4VP18. The materials have been characterised by differential scanning calorimetry, polarised optical microscopy and small-angle X-ray diffraction. The resulting complexes are assembled by hydrogen-bonding and form smectic A phases, with the polymeric chains spread along the surface of the glycosides bilayers. By using Fourier-transform infrared spectroscopy, FT-IR, and molecular simulations, we have assessed the selectivity of the hydrogen bonds formed between αManPKO and the polymeric segments. Our results suggest that the assembly of the polymeric complexes must be explained by a combination of interfacial mixing between the polymer/glycoside units at the bilayer boundaries (favoured by PEG) and the formation of strong hydrogen bonds (favoured by P4VP).
中文翻译:
揭示含有聚合物复合物的液晶天然糖苷中的氢键网络:实验和理论评估
摘要 在这项工作中,我们提出了一种简便而通用的策略来制备从天然来源获得的新型两亲化合物,避免昂贵的共价合成阶段,并且我们引入了一种强大的方法来描述碳水化合物液晶中的氢键网络。通过将天然甘露糖苷 αManPKO 与三种不同的聚合物底物混合制备:聚(环氧乙烷)、PEG、聚(4-乙烯基吡啶)、P4VP,以及含有 PEG 和 P4VP 片段的嵌段共聚物 PEG45-b- P4VP18。这些材料已通过差示扫描量热法、偏振光学显微镜和小角度 X 射线衍射进行了表征。得到的复合物通过氢键组装并形成近晶 A 相,聚合物链沿着糖苷双层的表面展开。通过使用傅里叶变换红外光谱、FT-IR 和分子模拟,我们评估了 αManPKO 和聚合物链段之间形成的氢键的选择性。我们的结果表明,聚合物复合物的组装必须通过双层边界处聚合物/糖苷单元之间的界面混合(PEG 支持)和强氢键的形成(P4VP 支持)的结合来解释。
更新日期:2020-07-01
中文翻译:
揭示含有聚合物复合物的液晶天然糖苷中的氢键网络:实验和理论评估
摘要 在这项工作中,我们提出了一种简便而通用的策略来制备从天然来源获得的新型两亲化合物,避免昂贵的共价合成阶段,并且我们引入了一种强大的方法来描述碳水化合物液晶中的氢键网络。通过将天然甘露糖苷 αManPKO 与三种不同的聚合物底物混合制备:聚(环氧乙烷)、PEG、聚(4-乙烯基吡啶)、P4VP,以及含有 PEG 和 P4VP 片段的嵌段共聚物 PEG45-b- P4VP18。这些材料已通过差示扫描量热法、偏振光学显微镜和小角度 X 射线衍射进行了表征。得到的复合物通过氢键组装并形成近晶 A 相,聚合物链沿着糖苷双层的表面展开。通过使用傅里叶变换红外光谱、FT-IR 和分子模拟,我们评估了 αManPKO 和聚合物链段之间形成的氢键的选择性。我们的结果表明,聚合物复合物的组装必须通过双层边界处聚合物/糖苷单元之间的界面混合(PEG 支持)和强氢键的形成(P4VP 支持)的结合来解释。