Long-Lived Room-Temperature Deep-Red-Emissive Intraligand Triplet Excited State of Naphthalimide in Cyclometalated IrIII Complexes and its Application in Triplet-Triplet Annihilation-Based Upconversion
作者:Jifu Sun、Wanhua Wu、Jianzhang Zhao
DOI:10.1002/chem.201200224
日期:2012.6.25
IrIII complexes with acetylide ppy and bpy ligands were prepared (ppy=2‐phenylpyridine, bpy=2,2′‐bipyridine) in which naphthal (Ir‐2) and naphthalimide (NI) were attached onto the ppy (Ir‐3) and bpy ligands (Ir‐4) through acetylide bonds. [Ir(ppy)3] (Ir‐1) was also prepared as a model complex. Room‐temperature phosphorescence was observed for the complexes; both neutral and cationic complexes Ir‐3 and
制备了具有乙炔ppy和bpy配体的环金属化Ir III配合物(ppy = 2-苯基吡啶,bpy = 2,2'-联吡啶),其中将萘二甲酸(Ir-2)和萘二甲酰亚胺(NI)连接到ppy(Ir-3)和bpy配体(Ir-4)通过乙炔键。[Ir(ppy)3 ](Ir-1)也准备作为模型配合物。观察到复合物在室温下发磷光。中性和阳离子配合物Ir-3和Ir-4均在可见光范围内显示出强吸收性(在402 nm处ε = 39600 M -1 cm -1和ε = 25100 中号-1 厘米-1在404纳米,分别地),长寿命的三线态激发态(τ Ť = 9.30微秒和16.45微秒)和室温红色发光(λ EM = 640纳米,Φ p = 1.4%和λ EM = 627纳米,Φ p = 0.3%;参见IR-1 :ε = 16600 中号-1 厘米-1在382纳米,τ EM = 1.16微秒,Φ p = 72.6%)