Rigid Polynuclear Cyclometallated Pt(II) / Ir(III) Complexes: Towards Supramolecular Triplet Emitters

环金属铂(II)和Ir(III)配合物是非常强大的发光体。目前学术界和工业界对它的兴趣主要来自于它们非凡的光物理性质和对各种应用的适用性。这类配合物的成功主要是因为在发光体中存在环金属化的金属中心，从而促进了三重态的高效磷光。我们建议在一个刚性的集成发光体中制备具有两个或更多金属中心的新的发光分子。我们认为，在这些大的共轭体系中，重原子效应将被增强，从而在红光中产生高效的磷光，并可能延伸到光谱的远红外区域。这类分子作为组装新的金属超分子结构的构件在超分子化学中引起了极大的兴趣，与经典的基于聚吡啶的组装相比，它可以提供更可控的几何结构和优异的发光性能。此外，我们的分子可以引起许多有趣的效应，这些效应源于分子间的pi-pi和pT-pT中心的相互作用，这表明刺激响应材料的发展。

Cyclometallated Pt(II) and Ir(III) complexes are exceptionally powerful luminophores. Current interest from academia and industry is driven by their remarkable photophysical properties and suitability for a variety of applications. The success of such complexes is mainly due to the presence of cyclometallated metal centre in a luminophore, which promotes efficient phosphorescence from the triplet state.We propose to make new luminescent molecules with two or more metal centres within one rigid integrated lumonophore. We think that in these large conjugated systems the heavy atom effect will be enhanced leading to efficient phosphorescence in the red and possibly extending far into the infrared region of the spectrum. The molecules of this kind are of interest in supramolecular chemistry as building blocks in assembly of new metallosupramolecular architectures, which in comparison with classical polypyridine-based assemblies, can provide more controlled geometry and superior luminescent properties. In addition, our molecules can give rise to many interesting effects arising from intermolecular pi-pi and Pt-Pt-centred interactions suggesting development of stimuli responsive materials.