Photoluminescence color tuning of phosphorescent bis-cyclometalated iridium(III) complexes by ancillary ligand replacement
作者:Shigeru Ikawa、Shigeyuki Yagi、Takeshi Maeda、Hiroyuki Nakazumi、Hideki Fujiwara、Yoshiaki Sakurai
DOI:10.1016/j.dyepig.2012.05.026
日期:2012.12
coordination geometry around the iridium center is not a main factor for the emission spectral differences caused by the O^O ancillary ligands. Furthermore, the ancillary ligand effect on the PL properties of the present iridium(III) complexes is independent on solvent polarity and concentrations. Taking these results into consideration, the ancillary ligand effect should be attributed to the electronic
制备了一系列带有各种类型的1,3-二酮酸酯辅助配体的双环金属化铱(III)配合物,并研究了它们的光致发光(PL)特性,尤其着重于发射颜色的调节。当二甲戊酰基甲烷酸酯辅助配体(O ^ O -1a)被共轭的1,3-二酮酸酯(例如1,3-双(3,4-二丁氧基苯基)丙烷-1,3-二酸酯(O ^ O -1b)和1,3-双(4-(二苯并[ b,d ]呋喃-4-基)苯基)丙烷-1,3-二酸酯(O ^ O -1c),发蓝光的双[2-(3,5) -双(三氟甲基)苯基)吡啶基-N,C 2 ']铱(III)(IR-1 )和蓝绿色的发光二[2-苯基吡啶-N,C 2' ]铱(III)(IR-2 )表现出的复合物显著红移磷光在溶液(λ PL ; 474 Ir-1a – c和Ir-2a – c分别为–604 nm和521–661 nm :下标a,b和c分别对应于O ^ O -1a – c)。另一方面,辅助配体替代在调节绿色发光的双[2-(2