高稳定性红光发射电化学电池。
Highly Stable Red-Light-Emitting Electrochemical Cells.
机构信息
Department of Chemistry, University of Basel , Spitalstrasse 51, CH-4056 Basel, Switzerland.
Instituto de Ciencia Molecular, Universidad de Valencia , C/Catedrático José Beltrán 2, ES-46980 Paterna (Valencia), Spain.
出版信息
J Am Chem Soc. 2017 Mar 1;139(8):3237-3248. doi: 10.1021/jacs.6b13311. Epub 2017 Feb 15.
The synthesis and characterization of a series of new cyclometalated iridium(III) complexes [Ir(ppy)(NN)][PF] in which Hppy = 2-phenylpyridine and NN is (pyridin-2-yl)benzo[d]thiazole (L1), 2-(4-(tert-butyl)pyridin-2-yl)benzo[d]thiazole (L2), 2-(6-phenylpyridin-2-yl)benzo[d]thiazole (L3), 2-(4-(tert-butyl)-6-phenylpyridin-2-yl)benzo[d]thiazole (L4), 2,6-bis(benzo[d]thiazol-2-yl)pyridine (L5), 2-(pyridin-2-yl)benzo[d]oxazole (L6), or 2,2'-dibenzo[d]thiazole (L7) are reported. The single crystal structures of [Ir(ppy)(L1)][PF]·1.5CHCl, [Ir(ppy)(L6)][PF]·CHCl, and [Ir(ppy)(L7)][PF] have been determined. The new complexes are efficient red emitters and have been used in the active layers in light-emitting electrochemical cells (LECs). The effects of modifications of the 2-(pyridin-2-yl)benzo[d]thiazole ligand on the photoluminescence and LEC performance have been examined. Extremely stable red-emitting LECs are obtained, and when [Ir(ppy)(L1)][PF], [Ir(ppy)(L2)][PF], or [Ir(ppy)(L3)][PF] are used in the active layer, device lifetimes greater than 1000, 6000, and 4000 h, respectively, are observed.
报道了一系列新型的环金属铱（III）配合物[Ir(ppy)(NN)][PF_6]的合成与表征，其中 Hppy=2-苯基吡啶，NN 是（吡啶-2-基）苯并[d]噻唑（L1）、2-（4-（叔丁基）吡啶-2-基）苯并[d]噻唑（L2）、2-（6-苯基吡啶-2-基）苯并[d]噻唑（L3）、2-（4-（叔丁基）-6-苯基吡啶-2-基）苯并[d]噻唑（L4）、2,6-双（苯并[d]噻唑-2-基）吡啶（L5）、2-（吡啶-2-基）苯并[d]恶唑（L6）或 2,2'-二苯并[d]噻唑（L7）。[Ir(ppy)(L1)][PF_6]·1.5CHCl、[Ir(ppy)(L6)][PF_6]·CHCl 和[Ir(ppy)(L7)][PF_6]的单晶结构已被确定。这些新配合物是有效的红色发光体，并已在发光电化学电池（LEC）的活性层中使用。研究了 2-（吡啶-2-基）苯并[d]噻唑配体修饰对光致发光和 LEC 性能的影响。获得了极其稳定的红色发光 LEC，当[Ir(ppy)(L1)][PF_6]、[Ir(ppy)(L2)][PF_6]或[Ir(ppy)(L3)][PF_6]用作活性层时，器件寿命分别大于 1000、6000 和 4000 h。
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