A 2,4-diamino-6-phenyl-1,3,5-triazine carrying a single oligo(ethylene oxide) (EO) chain has been investigated in binary mixtures with two-chain and three-chain semiperfluorinated benzoic acids. Mixtures of the triazine with three equivalents of the complementary acids exhibit a hexagonal columnar (Col_h) mesophase. Docking of three acid molecules to the diaminotriazine nucleus leads to the formation of disc-like aggregates with a central hydrogen-bonded polar core surrounded by the peripheral fluoroalkyl chains, which self-assemble in columns arranged on a hexagonal lattice. The polar EO chains at the triazine cores do not segregate into a distinct sub-space but are included into the polar cores, providing increased flexibility of the cores with respect to conformations and available hydrogen bonding sites. In equimolar (1 : 1) triazine/benzoic acid mixtures macroscopic phase separation of excess triazine from the columnar LC phases occurs. These Col_h phases are formed by [1 : 3] or [2 : 4] complexes, depending on the number of fluorinated chains. However, some of the excess triazine component is accommodated within the polar column cores, contributing to space filling and providing additional hydrogen bonding along the columns. Thus the EO chain, despite of being fixed at the periphery, assemble in the core region of the aggregates, this is distinct from the self-assembly of related alkyl or semiperfluoroalkyl substituted diaminotriazines with fluorinated benzoic acids, forming discrete disc-like [1 : 3] or rod-like [1 : 1] complexes. Obviously, the flexible EO chains decrease the effect of the aggregate shape on self-assembly and lead to an increased contribution of general amphiphilicity to self-assembly.

中文翻译：

---

结合亲水和亲氟分子链段的氢键介晶配合物†

在带有二链和三链半全氟苯甲酸的二元混合物中，已经研究了带有一条低聚（环氧乙烷）（EO）链的2,4-二氨基-6-苯基-1,3,5-三嗪。三嗪与三当量的互补酸的混合物呈六方柱状（Col _h）中间相。将三个酸分子对接至二氨基三嗪核，导致形成圆盘状聚集体，其中心氢键结合的极性核被周围的氟代烷基链包围，它们在以六边形格子排列的列中自组装。三嗪核的极性EO链不会分离到一个单独的子空间中，而是包含在极性核中，从而提高了核在构象和可用氢键位方面的灵活性。在等摩尔（1：1）三嗪/苯甲酸混合物中，从柱状LC相中发生了过量三嗪的宏观相分离。这些上校_{^ h}由[1：3]或[2：4]络合物形成相，具体取决于氟化链的数量。然而，一些过量的三嗪组分被容纳在极性柱芯中，从而有助于空间填充并提供沿柱的额外氢键。因此，尽管EO链固定在外围，但仍在聚集体的核心区域组装，这与相关的烷基或半全氟烷基取代的二氨基三嗪与氟化苯甲酸的自组装不同，形成了离散的盘状[1：1]。 3]或棒状[1：1]配合物。显然，柔性EO链减少了聚集体形状对自组装的影响，并导致一般两亲性对自组装的贡献增加。