Iridium(III) cyclometalated complexes in aqueous solution often display relatively weak luminescence. It has been shown in previous work that this emission can be significantly enhanced (by up to two orders of magnitude) by encapsulation in cucurbit[10]uril (Q[10]). Luminescence lifetime measurements suggest a dynamic self-quenching mechanism is active, possibly due to displacement of an excited guest complex via collision with an unbound complex. We devise a model for the association of a group of iridium(III) cyclometalated complexes with Q[10]. The model parameters are then fitted to steady-state emission titration curves. The excellent agreement of experimental data with the model provides valuable mechanistic information relating to the way this class of metal complexes interact and associate with the Q[10] host.

中文翻译：

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模拟包裹在葫芦素中的铱环金属化配合物的发光†

水溶液中铱（III）环金属化的配合物通常显示出相对较弱的发光。在先前的工作中已经表明，通过包裹在葫芦丝[10] uril（Q [10]）中，可以显着提高这种排放（最多两个数量级）。发光寿命测量表明动态的自猝灭机制是活跃的，这可能是由于激发的客体配合物通过与未结合的配合物碰撞而发生位移而引起的。我们设计了一组铱（III）缔合的模型）与Q [10]的环金属配合物。然后将模型参数拟合到稳态发射滴定曲线。实验数据与模型的出色一致性为此类金属络合物与Q [10]主体相互作用和缔合的方式提供了有价值的机制信息。