Synthesis and Characterization of Luminescent Cyclometalated Platinum(II) Complexes with Tunable Emissive Colors and Studies of Their Application in Organic Memories and Organic Light-Emitting Devices
Synthesis and Characterization of Luminescent Cyclometalated Platinum(II) Complexes with Tunable Emissive Colors and Studies of Their Application in Organic Memories and Organic Light-Emitting Devices
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DOI：
10.1021/jacs.7b04952
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发表时间：
2017-08-09
影响因子：
15
通讯作者：
Yam, Vivian Wing-Wah
中科院分区：
文献类型：
--
作者：
Chan, Alan Kwun-Wa;Ng, Maggie;Yam, Vivian Wing-Wah
制备了一系列发光环金属化NCN [NCN = 1,3-二（n -烷基苯并咪唑-2′-基）苯]铂-(II)炔基和咔唑配合物。用x射线晶体学对一种铂（II）咔唑配合物的结构进行了表征。对其相应的电化学和光物理性质进行了探讨和分析。NCN铂（II）配合物在脱气的二氯甲烷溶液中显示出丰富的发光，其发光曲线依赖于炔基配体和咔唑基配体。它们的发射能量与炔基和咔唑基配体的电子性质有关。通过改变炔基和咔唑基配体的电子性质，可以对发射能量进行微调，以覆盖广泛的可见光谱范围，这一点得到了计算研究的支持。一种供体-受体铂（II）配合物已被用于制造具有低工作电压、高开/关比和长保持时间的二进制存储性能的存储器件。基于另一种铂（II）咔唑基配合物制备了溶液可加工的oled，其最大外量子效率高达7.2%，与基于小分子对应物的真空沉积器件相当，说明了含铂（II）材料的多功能性质。
A series of luminescent cyclometalated NCN [NCN = 1,3-bis(N-alkylbenzimidazol-2'-yl)benzene]platinum-(II) alkynyl and carbazolyl complexes has been prepared. The structure of one platinum(II) carbazolyl complex has been characterized by X-ray crystallography. The corresponding electro-chemical and photophysical properties have been explored and analyzed. The NCN platinum(II) complexes displayed, rich luminescence in degassed dichloromethane solution with their emission profiles dependent on the coordinated alkynyl and carbazolyl ligands. Their emission energies are correlated to the electronic properties of the alkynyl and carbazolyl ligands. By varying the electronic properties of the alkynyl and carbazolyl ligands, emission energies could be fine-tuned to cover a wide range of-the visible spectrum as supported by computational studies. A donor-acceptor platinum(II) complex has been utilized to fabricate memory devices that exhibit binary memory performances with low operating voltages, high ON/OFF ratios,, and long retention times. Solution-processable OLEDs have been fabricated based on another platinum(II) carbazolyl complex, resulting in a maximum external quantum efficiency of up to 7.2%, which is comparable to that of the vacuum-deposited devices based on the small-molecule counterpart, illustrating the multifunctional nature of the platinum(II)-containing materials.