Significant Enhancement of Absorption and Luminescence Dissymmetry Factors in the Far‐Red Region: A Zinc(II) Homoleptic Helicate Formed by a Pair of Achiral Dipyrromethene Ligands
A homoleptic zinc(II) helicate organized by a pair of achiral dipyrrometheneligands through zinc(II) coordination was synthesized to evaluate the chiroptical properties. This zinc complex showed strong exciton‐coupled chiroptical responses from the helical configuration with a large absorption dissymmetry factor |gabs| (up to 0.20). More importantly, intense polarized luminescence in the far‐red region
作者:Wenhui Niu、Yubin Fu、Hartmut Komber、Ji Ma、Xinliang Feng、Yiyong Mai、Junzhi Liu
DOI:10.1021/acs.orglett.1c00232
日期:2021.3.19
this work, we describe the synthesis and characterization of three novel sulfur-doped nanographenes (NGs) (1–3) containing multiple subhelicenes, including carbo[4]helicenes, thieno[4]helicenes, carbo[5]helicenes, and thieno[5]helicenes. Density functional theory calculations reveal that the helicene substructures in 1–3 possess dihedral angles from 15° to 34°. The optical energy gaps of 1–3 are estimated
ELECTROLUMINESCENT COMPOUNDS WITH HIGH EFFICIENCY AND ORGANIC LIGHT-EMITTING DIODE USING THE SAME
申请人:Shin Hyo Nim
公开号:US20110152587A1
公开(公告)日:2011-06-23
The present invention relates to novel organic electroluminescent compounds and an organic light-emitting diode comprising the same. The organic electroluminescent compounds according to the present invention exhibit high luminous efficiency and excellent life property as a material, so that an OLED device having very good operation life can be prepared therefrom.