title: [(O--N--N)PtX] complexes as a new class of light-emitting materials for electrophosphorescent devices.
abstract: The synthesis and photophysical properties of the robust Pt(II) emitters [(O--N--N)PtX] (HO--N--N = 6-(2-hydroxyphenyl)-2,2'-bipyridine and its derivatives; X = Cl, Br, I, or -CC-Ph) are reported. Yellow electroluminescent devices based on these materials display a low turn-on voltage (1 cd m(-2) at 4 V) and a high luminance (37000 cd m(-2)). Complex 2e, [(F(t)Bu2O--N--N)PtCl], has the highest thermal stability and gave the best OLED.
authors.affiliation: Department of Chemistry and the HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, China.
authors.forename: Chi-Chung
authors.initials: CC
authors.lastname: Kwok
authors.forename: Hugo M Y
authors.initials: HM
authors.lastname: Ngai
authors.forename: Siu-Chung
authors.initials: SC
authors.lastname: Chan
authors.forename: Iona H T
authors.initials: IH
authors.lastname: Sham
authors.forename: Chi-Ming
authors.initials: CM
authors.lastname: Che
authors.forename: Nianyong
authors.initials: N
authors.lastname: Zhu