Bent Tridentate Receptors in Calamitic Mesophases with Predetermined Photophysical Properties: New Luminescent Lanthanide-Containing Materials
作者:Homayoun Nozary、Claude Piguet、Paul Tissot、Gérald Bernardinelli、Jean-Claude G. Bünzli、Robert Deschenaux、Daniel Guillon
DOI:10.1021/ja982545n
日期:1998.12.1
6-bis(benzimidazol-2‘-yl)pyridine cores into rodlike ligands L11-17. The crystal structure of the nonmesogenic ligand L13 (C39H37N5O4, triclinic, P1, Z = 2) shows the expected trans−trans conformation of the tridentate binding unit, which provides a linear arrangement of the semirigid aromatic sidearms. The crystal structure of the related mesogenic ligand L16 (C61H81N5O4, triclinic, P1, Z = 2) demonstrates
已开发出一种新的合成策略,将弯曲且刚性的三齿 2,6-双(苯并咪唑-2'-基)吡啶核引入棒状配体 L11-17。非介晶配体 L13(C39H37N5O4,三斜,P1,Z = 2)的晶体结构显示了三齿结合单元的预期反式-反式构象,它提供了半刚性芳香侧臂的线性排列。相关介晶配体 L16(C61H81N5O4,三斜,P1,Z = 2)的晶体结构表明亲脂侧链采用完全延伸的构象,导致略微螺旋扭曲的 I 形分子。通过明智地选择刚性中心核和半刚性亲脂性侧臂之间的间隔物,可以产生丰富多样的介晶现象,可以与电子和光物理特性的同时调整相结合。配体 L13,14 与 Ln(NO3)3·xH2O 反应以定量和选择性地生成中性 1:1 配合物 [Ln(Li)(NO3)3] (Ln = La to Lu),它们稳定...