Mesomorphism of ionic allylpalladium(<scp>ii</scp>) complexes containing pz<sup>R2</sup>py as ligands and [BF<sub>4</sub>]<sup>−</sup>, [PF<sub>6</sub>]<sup>−</sup>or [CF<sub>3</sub>SO<sub>3</sub>]<sup>−</sup>as counteranions
作者:Mari Carmen Torralba、José Antonio Campo、José Vicente Heras、Duncan W. Bruce、Mercedes Cano
DOI:10.1039/b601637e
日期:——
The synthesis and thermal behaviour is reported of some ionic liquid-crystalline complexes formed when a mesogenic, two-chained, pyrazolylpyridine ligand is bound to a η3-allylpalladium(II) fragment. The phase behaviour of the complexes is dominated by the formation of the SmA phase and, while the stability of the crystal phase appears to be controlled by intermolecular solid-state interactions, the stability of the liquid crystal phases is controlled by the length of the ligand alkoxy chains. Some of the complexes also show a complex polymorphism leading to the observation of double-melting behaviour.
报告了中生双链吡唑吡啶配体与δ-3-烯丙基钯(II)片段结合形成的一些离子液晶配合物的合成和热行为。这些配合物的相行为主要是形成 SmA 相,晶体相的稳定性似乎受分子间固态相互作用的控制,而液晶相的稳定性则受配体烷氧基链长度的控制。一些复合物还显示出复杂的多态性,从而导致观察到双熔行为。