Triarylamine-Based Wholly Aromatic Polyimide with Simultaneously Unprecedented Photoluminescence Efficiency and High Glass-Transition Temperature
Journal
Advanced Optical Materials
Journal Volume
10
Journal Issue
3
Date Issued
2022
Author(s)
Shao Y.-J
Abstract
The weak photoluminescence (PL) of wholly aromatic polyimide (Ar-PI) is generally associated with the strong charge-transfer complex effect in both solution and solid states. Research has focused on structural designs promoting the PL behavior, but Ar-PI PL remains a challenge in the solid state. Herein, a twisted conformation is incorporated into a triphenylamine-based polyimide backbone to obtain a series of Ar-PIs with extremely high PL quantum efficiency (ΦPL) in solution and even film states. PI3M-4M exhibits the highest ΦPL of up to 61% in the film state, which is considerably superior to the values for reported Ar-PIs. PI3M-4M is also the first Ar-PI to simultaneously demonstrate an unprecedented ΦPL with a remarkable glass-transition temperature Tg of 470?°C. ? 2021 Wiley-VCH GmbH.
Subjects
photoluminescence
quantum efficiency
triarylamine
twisted conformation
wholly aromatic polyimide
Aromatic compounds
Aromatization
Charge transfer
Efficiency
Glass
Glass transition
Photoluminescence
Polyimides
Quantum theory
Temperature
Aromatic polyimides
Complex effects
Film state
High-glass transition temperatures
Photoluminescence efficiency
Polyimide backbones
Triarylamines
Triphenylamines
Twisted conformation
Wholly aromatic polyimide
Quantum efficiency
Type
journal article