Structure-Property Relationship of Red- and Green-Emitting Iridium(III) Complexes with Respect to Their Temperature and Oxygen Sensitivity
Structure-Property Relationship of Red- and Green-Emitting Iridium(III) Complexes with Respect to Their Temperature and Oxygen Sensitivity
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DOI：
10.1002/ejic.201000610
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发表时间：
2010-10-01
影响因子：
2.3
通讯作者：
Holder, Elisabeth
中科院分区：
文献类型：
--
作者：
Tian, Nan;Lenkeit, Daniel;Holder, Elisabeth
我们报告的结构设计和表征的一系列中性杂配铱（III）配合物配备2-苯基吡啶，2-（萘-1-基）吡啶，和1-苯基异喹啉作为环化配体。为了逐渐增加杂配型铱（III）配合物的不对称结构，它们被提供有2，2，6，6-四甲基庚烷-3，5-二酮、1-（9 H-咔唑-9-基）-5，5-二甲基己烷-2，4-二酮和1-[3，6-双（4-己基苯基）-9H-咔唑-9-基]-5，5-二甲基己烷-2，4-二酮作为辅助配体。这些不对称的Ir-III配合物的电子物理和电化学性质进行了研究实验以及理论上通过使用密度泛函理论（DFT）计算。这些新的中性杂配铱（III）配合物的性质已实验比较homoleptic铱-III复杂的结构，揭示了对称的架构，由于三个类似的cycloprylating配体。本文所述的两类Ir-III络合物的发射强度明显受到温度和气压变化的影响。重点是氧敏感的Ir-III发射体的一般设计规则，由于结构依赖的氧灵敏度的磷光寿命的相关性。
We report on the structural design and characterization of a series of neutral heteroleptic iridium(III) complexes equipped with 2-phenylpyridine, 2-(naphthalen-1-yl)pyridine, and 1-phenylisoquinoline as cyclometalating ligands. To gradually increase the unsymmetrical architecture of the heteroleptic iridium(III) complexes, they have been furnished with 2,2,6,6-tetramethylheptane-3,5-dione, 1-(9H-carbazol-9-yl)-5,5-dimethylhexane-2,4-dione, and 1-[3,6-bis(4-hexylphenyl)-9H-carbazol-9-yl]-5,5-dimethylhexane-2,4-dione as ancillary ligands. The photophysical and electrochemical properties of these asymmetric Ir-III complexes have been investigated experimentally as well as theoretically by using density functional theory (DFT) calculations. The properties of these new neutral heteroleptic iridium(III) complexes have been experimentally compared to homoleptic Ir-III complex structures that reveal symmetrical architectures due to three similar cyclometalating ligands. The emission intensity of the herein described two classes of Ir-III complexes is clearly influenced by applying changes to temperature and air pressure. The emphasis is on general design rules for oxygen-sensitive Ir-III emitters due to the correlation of the structure-dependent oxygen sensitivity to their phosphorescence lifetimes.