Iridium(III) Complexes with Sulfonyl and Fluorine Substituents: Synthesis, Stereochemistry and Effect of Functionalisation on their Photophysical Properties
作者:Roberta Ragni、Enrico Orselli、Gregg S. Kottas、Omar Hassan Omar、Francesco Babudri、Adriana Pedone、Francesco Naso、Gianluca M. Farinola、Luisa De Cola
DOI:10.1002/chem.200801270
日期:2009.1
The synthesis and photophysical and electrochemical characterisation of new heteroleptic iridium complexes with electron‐withdrawing sulfonyl groups and fluorine atoms bound to phenylpyridine ligands are reported. The emission energy of these materials strongly depends on the position of the sulfonyl groups and on the number of fluorine substituents. A 90 nm wide tuning range of photoluminescence from
报道了具有吸电子磺酰基和结合到苯基吡啶配体上的氟原子的新型杂配铱配合物的合成,光物理和电化学特性。这些材料的发射能量强烈取决于磺酰基的位置和氟取代基的数量。A 90纳米宽调谐的光致发光的范围从蓝绿色(λ EM = 468纳米)的铱(III)双[2-(4'-苄基磺酰基)苯基吡啶-N,C2'] [3-(五氟苯基) -吡啶吡啶-2-基-1,2,4-三唑]到橙色(λ EM铱(III)双[2-(3'-苄基磺酰基)苯基吡啶基吡啶-N,C2'](2,4-癸二酸酯)的分子量为558 nm)。对于配合物的脱气溶液,还发现其发射量子产率为47%至71%,而铱(III)bis [2-(5'-苄磺酰基-3',6'空气平衡的二氯甲烷中的二氟)苯基吡啶基吡啶N,C 2'](2,4-癸二酸酯)。1 H NMR光谱检测到苄基磺酰基取代的二聚体和杂配体的配合物具有不同寻常的立体化学,其特征是苯基吡啶配体的吡啶基氮原子相互顺式排列,这不同于最常见的反式
Influence of electronic and steric effects of substituted ligands coordinated to Ir(<scp>iii</scp>) complexes on the solution processed OLED properties
作者:Wojciech Mróz、Roberta Ragni、Francesco Galeotti、Ernesto Mesto、Chiara Botta、Luisa De Cola、Gianluca Maria Farinola、Umberto Giovanella
DOI:10.1039/c5tc01278c
日期:——
are used as dopant emitters in solution processed organic light-emitting diodes. These emitters bear one sterically hindered 2,4-decanedionate and two phenylpyridine (ppy) ligands functionalized with electron withdrawing benzylsulfonyl groups and fluorine atoms. The steric and electroniceffects of such substituents on the photophysical properties and performance of devices of 1 and 2 are investigated