The reactions between trinuclear gold complex tppmAu3Cl3 (tppm = tris(diphenylphosphino)methane), arylacetylenes HC2C6H4X and Cu+ under basic conditions result in formation of the heterometallic complexes [tppm(AuC2C6H4X)3Cu]+, X = H (1), COOMe (2), CN (3), OMe (4), NH2 (5). These compounds belong to one structural motif and consist of the heterometallic (AuC2C6H4X)3Cu} core stabilized by the tridentate phosphine. Compounds 1â5 were characterized by polynuclear NMR and IR spectroscopy, ESI-MS and single-crystal X-ray analysis. Luminescence properties of these complexes have been studied and revealed a substantial red shift of the emission maxima with the increase in the electron donicity of the alkynyl ligands substituents in the 550â680 nm range. The theoretical calculations of the electronic structures showed that variations of the substituents on the alkynyl ligands display very little effect on the molecular structural parameters but show appreciable influence on the orbital energies and luminescence characteristics of the compounds under study.
三核
金配合物 tppmAu3Cl3 (tppm = 三(
二苯基膦)
甲烷)、芳基
乙炔 HC2C6H4X 和 Cu+ 在碱性条件下反应,形成异
金属配合物 [tppm(AuC2C6H4X)3Cu]+, X = H (1), COOMe (2 )、CN (3)、OMe (4)、NH2 (5)。这些化合物属于一个结构基序,由三齿膦稳定的异
金属(AuC2C6H4X)3Cu}核心组成。通过多核核磁共振、红外光谱、ESI-MS 和单晶 X 射线分析对化合物 1–5 进行了表征。研究人员对这些配合物的发光特性进行了研究,发现随着 550-680 nm 范围内炔基
配体取代基的电子性增加,发射最大值会发生显着的红移。电子结构的理论计算表明,炔基
配体上取代基的变化对分子结构参数的影响很小,但对所研究的化合物的轨道能量和发光特性显示出明显的影响。