om7b00233_si_001.pdf (3.51 MB)
Platinum(II) Dihalide Complexes with 9‑Arsafluorenes: Effects of Ligand Modification on the Phosphorescent Properties
journal contribution
posted on 2017-06-27, 15:03 authored by Hiroaki Imoto, Hiroshi Sasaki, Susumu Tanaka, Takashi Yumura, Kensuke Naka9-Arsafluorenes, which can be easily
and safely synthesized, are
promising candidates as ligands for solid-state phosphorescent complexes
due to their rigidity and bulkiness. The methyl group of 9-methyl-9-arsafluorene
was readily converted to various substituents, and the platinum(II)
dihalide complexes with the obtained 9-arsafluorenes were synthesized.
The geometry of the platinum(II) dihalide complexes was dependent
on the induced substituent and the halogen. The trans isomers showed
intense phosphorescence, while no emission was observed in the cis
isomers. The mechanisms of the different emission behaviors were elucidated
by diffuse reflection spectra and theoretical calculations. Among
the emissive trans complexes, the substituent of the arsafluorene
and the halogen played a key role in the emission intensity.