作者:María José Mayoral、Paloma Ovejero、José Antonio Campo、José Vicente Heras、Elena Pinilla、María Rosario Torres、Carlos Lodeiro、Mercedes Cano
DOI:10.1039/b808487d
日期:——
A series of ionic bis(pyrazole)-silver(I) and -gold(I) complexes [ML2][A] (M = Ag, Au; A = BF4−, PF6−, NO3−), prepared by coordination of the mesomorphic L = Hpz2R(n) or non-mesomorphic L = HpzR(n) pyrazole ligands (Hpz2R(n) = 3,5-bis(4-alkyloxyphenyl)pyrazole; HpzR(n) = 3-(4-alkyloxyphenyl)pyrazole), has been studied. The complexes exhibit enantiotropic behaviour, showing smectic A (SmA) mesophases. The choice of the ligands allows the achievement of ‘H’ or ‘U’ molecular shapes, which appear to be responsible for the attainment of liquid crystal mesophases, these not being dependent on the coordinating or non-coordinating nature of the A counteranions. The new complexes are photoluminescent both in the solid state and in solution at room temperature. In addition, the luminescent behaviour of selected compounds as a function of the temperature indicates that the luminescence is maintained in the mesophase.
一系列离子型双(吡唑)-银(I)和-金(I)配合物[ML2][A](M = Ag, Au;A = BF4-、PF6-、NO3-)配位制备的中形态 L = Hpz2R(n) 或非中形态 L = HpzR(n) 吡唑配体(Hpz2R(n) = 3,5-双(4-烷氧基苯基)吡唑;HpzR(n) = 3-(4-烷氧基苯基)吡唑)。这些配合物表现出各向异性,呈现出 Smectic A (SmA) 介相。配体的选择可以实现 "H "或 "U "分子形状,这似乎是实现液晶介相的原因,而这些并不取决于 A 反阳离子的配位或非配位性质。在室温下,这些新复合物在固态和溶液中都能发光。此外,所选化合物的发光行为与温度的函数关系表明,发光在介相中得以保持。