Boron-modified pyrrole-based anion receptors (catechol-boron and diphenylboron dipyrrolyldiketone derivatives) formed planarreceptor-anioncomplexes, leading to charge-by-charge assemblies with planarcations, as in the corresponding difluoroboron derivative.
Modified 3,5‐dipyrrolylpyrazole (DPP) derivatives in their protonated form produce planar [2+2]‐type complexes with trifluoroacetate (TFA) ions. These complexes serve as constituent components of ion‐pair‐based assemblies. An essential strategy for the construction of dimension‐controlled organized structures based on these [2+2]‐type complexes is the introduction of aryl rings bearing long alkyl chains
Aryl-Substituted C<sub>3</sub>-Bridged Oligopyrroles as Anion Receptors for Formation of Supramolecular Organogels
作者:Hiromitsu Maeda、Yohei Haketa、Takashi Nakanishi
DOI:10.1021/ja074435z
日期:2007.11.1
example, derivatives with long alkoxy chains at 3,4,5-positions of the substituent aryl rings (5b-d) afford emissive gel structures in hydrocarbon solvents, such as octane, based on the stacking of slipped H- and J-aggregates at the core pi-plane. The structural organization of the supramolecular gels was investigated by AFM, SEM, and XRD measurements as well as by considering the solid-state packing