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题名: Achieving near-infrared emission in platinum(II) complexes by using an extended donor-acceptor-type ligand
作者: Zhang, You-Ming1; Meng, Fanyuan1, 3; Tang, Jian-Hong4; Wang, Yafei1; You, Caifa1; Tan, Hua1; Liu, Yu1; Zhong, Yu-Wu4; Su, Shijian3; Zhu, Weiguo1, 2
刊名: DALTON TRANSACTIONS
发表日期: 2016
卷: 45, 期:12, 页:5071-5080
收录类别: SCI
英文摘要: A series of (CN)-N-boolean AND ligands with donor-acceptor (D-A) frameworks, i.e. TPA-BTPy, TPA-BTPy-Fl and Fl(TPA-BTPy)(2), as well as their mono-and di-nuclear platinum(II) complexes of (TPA-BTPy)Pt(pic), (TPA-BTPy-Fl) Pt(pic) and [Fl(TPA-BTPy)(2)]Pt-2(pic)(2) are respectively designed and synthesized, in which tri-phenylamine (TPA) and fluorene (Fl) are used as the D units, 4-(pyrid-2-yl)benzothiadiazole (BTPy) as the A unit, and the picolinate anion (pic) as the auxiliary ligand. Their thermal, photophysical and electro-chemical characteristics were investigated. Compared to mono-nuclear platinum complexes and their free ligands, this dinuclear one of [Fl(TPA-BTPy)(2)]Pt-2(pic)(2) shows an obvious interaction from the platinum atom to ligand and dual emission peaks at 828 and 601 nm in thin films. Upon oxidation with antimony pentachloride in dichloromethane, charge transfer transitions between the platinum and ligand are observed for the three complexes. The single-emissive-layer polymer light-emitting devices doped with [Fl(TPA-BTPy)(2)]Pt-2(pic)(2) display a strong electroluminescence with dual emission peaks at 780 and 600 nm at a dopant concentration over 4 wt%. A maximum external quantum efficiency of 0.02% with a radiance of 59 mu W cm(-2) is obtained in the device at 30 wt% dopant concentration. This work indicates that the use of an extended D-A-type ligand is an effective strategy to achieve NIR emission for platinum complexes in PLEDs.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35919
Appears in Collections:光化学实验室_期刊论文

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作者单位: 1.Xiangtan Univ, Key Lab Environment Friendly Chem & Applicat, Coll Chem, Minist Educ, Xiangtan 411105, Peoples R China
2.Changzhou Univ, Sch Mat Sci & Engn, Changzhou 213164, Peoples R China
3.S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
4.Chinese Acad Sci, CAS Key Lab Photochem, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
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