Roy Jorge, Forzatti Michele, Arnal Lorenzo, Martín Antonio, Fuertes Sara, Tordera Daniel, Sicilia Violeta
Departamento de Química Inorgánica, Facultad de Ciencias, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, Zaragoza 50009, Spain.
Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático J. Beltran, 2, Paterna 46980, Spain.
Inorg Chem. 2024 Apr 22;63(16):7275-7285. doi: 10.1021/acs.inorgchem.4c00105. Epub 2024 Apr 8.
The ionic transition metal complexes (iTMCs) [{Pt(CC*)(μ-Rpz)}Ag(PPh)]X (HCC* = 1-(4-(ethoxycarbonyl)phenyl)-3-methyl-1-imidazole-2-ylidene, X = ClO/PF Rpz = pz , 4-Mepz , and 3,5-dppz ) were prepared from the neutral [{Pt(CC*)(μ-Rpz)}] (Rpz = pz , 4-Mepz , and 3,5-dppz ) and fully characterized. The "Ag(PPh)" fragment is in between the two square-planar platinum units in an "open book" disposition and bonded through two Pt-Ag donor-acceptor bonds, as shown by X-ray diffraction (d ∼ 2.78 Å, -). Pt{H} and P{H} NMR confirmed that these solid-state structures remain in solution. Photoluminescence studies and theoretical calculations on , were performed. The diphenylpyrazolate derivatives show the highest photoluminescence quantum yield (PLQY) in the solid state. Therefore, and its neutral precursor were selected as active materials on light-emitting devices. OLEDs fabricated with showed a turn-on voltage of 3.2 V, a luminance peak of 21,357 cd m at 13 V, and a peak current efficiency of 28.8 cd A (9.5% EQE). They showed a lifetime t of 15.7 h. OLEDs using showed a maximum luminance of 114 cd m, while LECs exhibited a maximum luminance of 20 cd m and a current efficiency of around 0.2 cd A, with a t value of 50 min.
离子过渡金属配合物（iTMCs）[{Pt(CC*)(μ-Rpz)}Ag(PPh)]X（HCC* = 1-(4-(乙氧羰基)phenyl)-3-甲基-1-咪唑-2-亚基，X = ClO/PF，Rpz = pz、4-Mepz和3,5-dppz）由中性的[{Pt(CC*)(μ-Rpz)}]（Rpz = pz、4-Mepz和3,5-dppz）制备而成，并进行了全面表征。如X射线衍射所示（d ∼ 2.78 Å，-），“Ag(PPh)”片段以“打开的书”的排列方式位于两个平面正方形铂单元之间，并通过两个Pt-Ag供体-受体键相连。Pt{H}和P{H}核磁共振证实这些固态结构在溶液中依然存在。对……进行了光致发光研究和理论计算。二苯基吡唑酸盐衍生物在固态时显示出最高的光致发光量子产率（PLQY）。因此，……及其中性前体被选作发光器件的活性材料。用……制造的有机发光二极管（OLED）的开启电压为3.2 V，在13 V时的亮度峰值为21357 cd m，峰值电流效率为28.8 cd A（9.5%外量子效率）。它们的寿命t为15.7小时。使用……的OLED的最大亮度为114 cd m，而发光电化学电池（LEC）表现出的最大亮度为20 cd m，电流效率约为0.2 cd A，t值为50分钟。
