Exploring countered anions effect on the luminescence behaviors of triphenylamine-based dipyridinium salts and poly(pyridinium salts)
Journal
Reactive and Functional Polymers
Journal Volume
217
Start Page
106481
ISSN
13815148
Date Issued
2025-12
Author(s)
Huang, Kai-Jhen
Shao, Yu-Jen
Lin, Chin-Hsuan
Lin, Peng-Yi
Kao, Yu-Ting
Lin, Yan-Ding
Chou, Pi-Tai
Abstract
Two series of acceptor-donor-acceptor (A−D−A) structural triphenylamine (TPA)-based dipyridinium salts, as well as the corresponding poly (pyridinium salts), have been strategically designed and synthesized in this work. Substantial intramolecular charge transfer (ICT) effects of dipyridinium salts with solvent- and counter anion-dependent emission features manifested in photoluminescence (PL) spectroscopy and confirmed by cyclic voltammetry and theoretical approaches. The PL quantum yields (ΦPL) of prepared dipyridinium salts could facilitate further enhancement in neat film by incorporating larger anions, including BF4−, ClO4−, and PF6−; among them, CN-BF4 achieved a ΦPL as high as 88 %. PH and PCN polymers were also successfully prepared with high molecular weight (Mw > 94 kDa) and characterized, revealing aggregation-induced emission (AIE) and aggregation-induced emission enhancement (AIEE) behaviors, in which PCN-BF4 demonstrates the greatest ΦPL of 22 % in the neat film.
Subjects
Anion effect
Dipyridinium salts
Intramolecular charge-transfer
Photoluminescence
Poly (pyridinium salt)
Triarylamine
SDGs
Publisher
Elsevier B.V.
Type
journal article