Pentacyanocyclopentadienide (PCCp−), a stable π‐electronic anion, provided various ion‐pairing assemblies in combination with various cations. PCCp−‐based assemblies exist as single crystals and mesophases owing to interionic interactions with π‐electronic and aliphatic cations with a variety of geometries, substituents, and electronic structures. Single‐crystal X‐ray analysis revealed that PCCp− formed
Solid-state supramolecular assemblies consisting of planar charged species
作者:Yohei Haketa、Mayumi Takayama、Hiromitsu Maeda
DOI:10.1039/c2ob07059f
日期:——
Pyrrole-based π-conjugatedanion-responsivemolecules provided various planar anionic structures by complexation with halide anions, resulting in the formation of solid-state assemblies with planar counter cations and exhibiting various modes of charge-by-charge assembly depending on the substituents of the anion receptors.
diverse derivatives of dipyrrolyldiketone boron complexes as anion-responsive π-electronic systems were synthesized via the Huisgen cycloaddition of an ethynyl-substituted anion receptor and azide derivatives. The obtained triazole-substituted anion receptors showed effective anion-binding behaviors and ion-pairing assembliescomprisingreceptor–anioncomplexes and countercations. Solid-state ion-pairing
in which pyrrole units were connected by a partially conjugated system as a singlet spin coupler, were synthesized. QPB, which was stabilized by the introduction of a benzo unit at the pyrrole β-positions, formed a closed-shell tautomer conformation that showed near-infrared absorption. The deprotonated species, monoanion QPB– and dianion QPB2–, showing over 1000 nm absorption, were formed by the addition