Probing solution behaviour of metallosupramolecular complexes using pyrene fluorescence
作者:Nicola M. Cox、Lindsay P. Harding、Jennifer E. Jones、Simon J. A. Pope、Craig R. Rice、Harry Adams
DOI:10.1039/c1dt11831e
日期:——
A new method for assessing the topology of metallosupramolecular assemblies using pyrene-appended ligands is reported. Two potentially tetradentate ligands containing one (L1) and two (L2) terminal pyrene moieties were synthesised and their complexes with Cu+ and Cd2+ were characterised. Photophysical measurements demonstrate that in [Cu2(L1)2]2+, [CdL1]2+ and [Cu2(L2)2]2+ the emission spectra are dominated by monomeric emission but in the cadmium complex of L2 (where the pyrene units are in close proximity) a quenching of the luminescence coupled with weak emission at 540 nm is indicative of excimer formation.
本文报告了一种利用芘配体评估金属超分子组装体拓扑结构的新方法。研究人员合成了两种潜在的四价配体,分别含有一个(L1)和两个(L2)末端芘分子,并对它们与 Cu+ 和 Cd2+ 的配合物进行了表征。光物理测量结果表明,在 [Cu2(L1)2]2+、[CdL1]2+ 和 [Cu2(L2)2]2+ 中,发射光谱以单体发射为主,但在 L2 的镉配合物中(芘单元非常接近),发光淬灭加上 540 纳米处的微弱发射表明存在准分子形成。