Cyclometalated platinum(II) complexes with various donor-acceptor moieties have been synthesized and structurally characterized. The photophysical behaviors of the complexes are highly sensitive to the modulation of the donor and acceptor moieties. The donor-acceptor couple is also crucial to stabilize the field-induced charge-transfer state in the resistive memories based on this class of complexes, leading
已经合成了具有各种供体-受体部分的环金属化铂 (II) 配合物并对其进行了结构表征。复合物的光物理行为对供体和受体部分的调制高度敏感。施主 - 受主对稳定基于此类复合物的电阻存储器中的场致电荷转移状态也至关重要,从而导致器件的低开关阈值电压、高开/关比和高耐用性。
Novel triphenylamine-based cyclometalated platinum(II) complexes for efficient luminescent oxygen sensing
Novel triphenylamine-based cyclometalated Pt(II) complexes containing a pyridyl moiety have been synthesized and fully characterized. The cyclometalating ligands were prepared via an efficient palladium-catalyzed ligand-free Suzuki reaction of 4-(diphenylamino)phenylboronic acid with 2-pyridyl bromides under aerobic and aqueous conditions. The photophysical properties of the complexes exhibited that introducing an electron-withdrawing group like trifluoromethyl or cyano group on the 5-position of the pyridine ring affected the LUMO level of the Pt(II)) complex significantly, resulting in a marked decrease in energy gap. Moreover, the complex with a cyano group at the 5-position imparts a substantial red-shift up to 56 nm. The O-2 sensitivity of the complexes was quantitatively evaluated in a polymer film. The results of the O-2-sensing sensitivity of the Pt(II) complexes demonstrated that the complex with a nitrile ligand exhibited the highest sensitivity (K-SV(app) = 0.102 Torr(-1)). The triphenylamine-based cyclometalated Pt(II) complexes are potential candidates for efficient luminescent oxygen sensing. (C) 2013 Elsevier Ltd. All rights reserved.