Bright Blue and White Electrophosphorescent Triarylboryl-Functionalized C^N-Chelate Pt(II) Compounds: Impact of Intramolecular Hydrogen Bonds and Ancillary Ligands
作者:Xiang Wang、Yi-Lu Chang、Jia-Sheng Lu、T. Zhang、Zheng-Hong Lu、Suning Wang
DOI:10.1002/adfm.201302871
日期:2014.4
blue‐green phosphorescent C^N chelate Pt(II) compounds that contain a dimesitylboryl‐functionalized phenyl‐1,2,3‐triazole ligand (Bptrz) are synthesized. The influence of three different ancillary ligands, namely acetylacetonato (acac), picolinate (pic) and pyridyl‐1,2,4‐triazolyl (pytrz), on phosphorescence quantum efficiency and excimer emission is examined. Pt(II) compounds with a p‐Bptrz ligand consistently
合成了新的蓝色和蓝绿色磷光C ^ N螯合物Pt(II)化合物,其中包含二甲烯丙基功能化的苯基1,2,3-三唑配体(Bptrz)。研究了三种不同的辅助配体,即乙酰丙酮(acac),吡啶甲酸(pic)和吡啶基1,2,4-三唑基(pytrz)对磷光量子效率和准分子发射的影响。具有p- Bptrz配体的Pt(II)化合物始终发出蓝绿色,发射波长= 490-500 nm,而具有m- Bptrz配体的化合物则发出蓝色,λem = 450-460 nm,且具有量子效率高达0.97。除了蓝色单体发射峰,Pt(m-Bptrz)(pytrz)化合物在固体基质中约550 nm处显示受激准分子发射峰,其强度取决于pytrz上的取代基和掺杂浓度。由于单体和受激准分子的发射,Pt(m- Bptrz)(pytrz)化合物的多个成员均观察到亮白色的磷光。发现分子内CH···N氢键在Pt(m- Bptrz)(pytrz)化