摘要
通过Ullmann反应和Negishi偶联反应,合成了一种含三芳胺功能基的吡啶-2-甲酸衍生物;并以此为辅助配体、1-苯基异喹啉为环金属配体,设计合成了一种新型环金属铱配合物.该配合物的二氯甲烷溶液,在391～461nm范围呈现了强烈的金属-配体电荷转移(MLCT)电子跃迁吸收带;其最大发光波长为609nm.与传统的二(1-苯基异喹啉)(吡啶-2-甲酸)合铱配合物相比,设计的环金属铱配合物具有增强的MLCT电子跃迁吸收和低的氧化电位,是一种有发展潜力的红色磷光材料.
A triarylamine-based picolinic acid was synthesized through the Ullmann reaction and Negishi coupling reaction. Using this class of picolinic acid derivative as an auxiliary ligand and 1-phenylisoquinoline as a cyclometalated ligand, a cyclometalated iridium complex was also prepared. The intense absorption band in 391-461 nm from the metal-ligand charge transfer （MLCT） transition and photoluminescence peak at 609 nm were exhibited for this iridium complex in dichlomethane. Compared to bis（1-phenylisoquinolyl-N,C2＇）（picolinato） iridium（III）, the iridium complex containing the triarylamine-based picolinic acid displays increased MLCT transition and low oxidation potential and is expected to be a promising red phosphorescent material.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2008年第19期2146-2150,共5页
Acta Chimica Sinica
基金
国家自然科学基金(Nos.50473046
20772101)
湖南省科技厅科学研究项目(No.2007FJ3017)
湖南省教育厅科学基金(No.07C764)资助项目
关键词
三芳胺
吡啶甲酸
环金属铱配合物
合成
光致发光
triarylamine
picolinic acid
cyclometalated iridium complex
synthesis
photoluminescence
