Inter/intramolecular hydrogen bonding of a series of hydroxystearic acids (HSAs) are investigated. Self-assembly of molecular gels obtained from these fatty acids with isomeric hydroxyl groups is influenced by the position of the secondary hydroxyl group. 2-Hydroxystearic acid (2HSA) does not form a molecular dimer, as indicated by FT-IR, and growth along the secondary axis is inhibited because the secondary hydroxyl
研究了一系列羟基
硬脂酸(H
SA)的分子间/分子间氢键。由这些具有异构羟基的
脂肪酸获得的分子凝胶的自组装受到仲羟基位置的影响。如FT-IR所示,2-羟基
硬脂酸(2H
SA)不会形成分子二聚体,并且由于仲羟基无法形成分子间的H键,因此沿仲轴的生长受到抑制。同样,XRD长间隔短于羟基
硬脂酸的二聚体长度。3-羟基
硬脂酸(3H
SA)形成无环二聚体,并且羟基无法氢键结合,从而阻止了晶体结构沿副轴生长。最后,异构体6H
SA,8H
SA,10H
SA,12H
SA和14H
SA具有相似的XRD和FT-IR模式,这表明这些分子都以相似的方式自组装。单体形成羧基环状二聚体,并且仲羟基促进沿仲轴的生长。