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Modelling the luminescence of iridium cyclometalated complexes encapsulated in cucurbituril

机译:在葫芦菌中涂上铱的铱环级复合物的发光

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摘要

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.
机译:铱星(III)水溶液中的环级级配合物通常显示出相对较弱的发光。 在以前的工作中已经显示出这种发射可以通过封装在葫芦(Q [10])中通过封装显着增强(最多两个数量级)。 发光寿命测量表明,动态自熄机制是有效的,可能是由于通过与未结合复杂的碰撞的碰撞使兴奋的宾客复杂的位移。 我们设计了一组铱(III)环状级复合物与Q [10]的型号的模型。 然后将模型参数安装在稳态排放滴定曲线上。 与模型的实验数据的优秀协议提供了有价值的机制信息,与这类金属配合物相互作用并与Q [10]主机相关联。

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