Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 3200008, Haifa, Israel.
Phys Chem Chem Phys. 2018 Dec 5;20(47):29610-29615. doi: 10.1039/c8cp04328k.
Inverse melting α-cyclodextrin·4-methylpyridine·H2O ternary mixtures were studied via solution, high-resolution magic-angle-spinning and 2D-NOESY NMR spectroscopy with the aim of unveiling the supramolecular driving force for the unusual inverse-melting phase transition. The role of solvent-solvent interactions as well as solvent-solute interactions in the emergence of the inverse-melting phenomenon is revealed. A surprising re-entrant solvent-solvent interaction is found in the system and in the 4-methylpyridine·water solvent system, supporting the non-coincidental relationship between inverse melting and re-entrant phase transitions, at least in the present system.
通过溶液、高分辨率魔角旋转和二维 NOESY NMR 光谱研究了反熔 α-环糊精·4-甲基吡啶·H2O 三元混合物，旨在揭示超分子驱动力对于异常反熔相转变的作用。揭示了溶剂-溶剂相互作用以及溶剂-溶质相互作用在反熔现象出现中的作用。在该体系和 4-甲基吡啶-水溶剂体系中发现了一种令人惊讶的反溶剂-溶剂相互作用，支持了反熔与重入相转变之间的非巧合关系，至少在本体系中是如此。
