Design and Characterization of a New Phenoxypyridine-Bipyridine-Based Tetradentate Pt(II) Complex Toward Stable Blue Phosphorescent Emitters.

ABSTRACT: Although various phosphorescent organic light-emitting diodes (PhOLEDs) have been developed, their lifetimes remain shorter than those of fluorescent OLEDs. In this study, a novel Pt(II) complex featuring a tetradentate ligand composed of bipyridine and phenoxypyridine, referred to as LL-O, was synthesized and fully characterized to evaluate its potential as a dopant for PhOLEDs. Geometry-optimized calculations indicate that LL-O adopts a distorted square-planar structure around the Pt(II) center. The complex displays bluish-green emission with maxima at 490 and 518 nm. However, it exhibits a low photoluminescence quantum yield (4%), primarily due to a dominant non-radiative decay rate that surpasses the radiative decay rate. Natural transition orbital analysis reveals that t

SUBMITTER: Lim DG 

PROVIDER: S-EPMC12844317 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature