In 2017,Liu, Boao; Dang, Feifan; Feng, Zhao; Tian, Zhuanzhuan; Zhao, Jiang; Wu, Yong; Yang, Xiaolong; Zhou, Guijiang; Wu, Zhaoxin; Wong, Wai-Yeung published 《Novel iridium(III) complexes bearing dimesitylboron groups with nearly 100% phosphorescent quantum yields for highly efficient organic light-emitting diodes》.Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published the findings.SDS of cas: 29682-15-3 The information in the text is summarized as follows:
A series of cyclometalated iridium (III) complexes, Ir-B-1, Ir-B-2, Ir-B-3, and Ir-B-4, were synthesized with the 2-phenylpyridine (ppy) type main ligand possessing a dimesitylboron group and the auxiliary ligand containing other main-group element units showing unique charge injection/transporting features. Their thermal stability, photophys. and electrochem. properties, and electroluminescent (EL) performances have been characterized. Time-dependent d. functional theory (TD-DFT) calculations were carried out to study the photophys. properties of these complexes. All these complexes can emit intense orange phosphorescence with extremely high quantum yields of nearly 100% measured in neat films at room temperature Moreover, the solution-processed organic light-emitting devices (OLEDs) using these complexes as orange emitters can show very high EL efficiencies with the maximum luminance efficiency (ηL) of 85.1 cd A-1, corresponding to a power efficiency (ηP) of 69.7 lm W-1 and an external quantum efficiency (ηext) of 28.1%. In the part of experimental materials, we found many familiar compounds, such as Methyl 5-bromopicolinate(cas: 29682-15-3SDS of cas: 29682-15-3)
Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.SDS of cas: 29682-15-3