• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Structural, Photophysical, and Electrophosphorescent Properties of Platinum(II) Complexes Supported by Tetradentate N_2O_2 Chelates
【24h】

Structural, Photophysical, and Electrophosphorescent Properties of Platinum(II) Complexes Supported by Tetradentate N_2O_2 Chelates

机译：四齿N_2O_2螯合物支持的铂（II）配合物的结构，光物理和电致磷光性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present an examination of the structural and photophysical characteristics of [Pt(N_2O_2)] complexes bearing bis(phenoxy)diimine auxiliaries (diimine=4,7-Ph_2phen (1) and 4,4'-tBu_2bpy (2)) that are tetradentate relatives of the quinolinolato (q) ligand. These neutral derivatives display high thermal stability (>400 deg C in N_2). While the crystal lattice in 1 consists of (head-to-tail)-interacting dimers, molecules of 2 are arranged into infinitely stacked planar sheets with possible pi-pi interactions but no close Pt…Pt contacts. Complexes 1 and 2 exhibit moderately intense low-energy UV/Vis absoptions around lambda=400-500 nm that undergo negative solvatochromic shifts. Both derivatives are highly luminescent in solution at 298 K with emission lifetimes in the mus range, and mixed ~3[1->pi~*(di-imine)]->pi~&(diimine)] charge-transfer states and tentatively assigned. The excited-state peoperties of 2 are also in-vestigated by time-resolved absorption spectroscopy and by quenching experiments with pyridinium acceptors to estimate the excited-state redox potential. These emitters have been employed as electrophosphorescent dopants in multilayer OLEDs. Differences between the brightness, color, and overall performance of devices incorporating 1 and 2 are attributed to the influence of the diimine substituents.
机译：我们提出了具有双齿的双（苯氧基）二亚胺助剂（diimine = 4,7-Ph_2phen（1）和4,4'-tBu_2bpy（2））的[Pt（N_2O_2）]配合物的结构和光物理特性的检查喹啉酮基（q）配体的亲戚。这些中性衍生物显示出高的热稳定性（在N_2中> 400℃）。 1中的晶格由（头到尾）相互作用的二聚体组成，而2的分子被排列成无限可能的pi-pi相互作用的无限堆叠的平面片，但没有紧密的Pt…Pt接触。配合物1和2在lambda = 400-500 nm附近表现出中等强度的低能量UV / Vis吸收，经历负溶剂化变色。两种衍生物在298 K的溶液中均具有高发光性，发射寿命在mus范围内，并暂时混合〜3 [1-> pi〜*（di-imine）]-> pi〜＆（diimine）]电荷转移态已分配。还通过时间分辨吸收光谱法和通过用吡啶鎓受体进行的猝灭实验来研究2的激发态比，以估计激发态的氧化还原电位。这些发射极已经用作多层OLED中的电致磷光掺杂剂。包含1和2的设备的亮度，颜色和整体性能之间的差异归因于二亚胺取代基的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号