Revealing the internal heavy chalcogen atom effect on the photophysics of the dibenzo[a,j]phenazine-cored donor–acceptor–donor triad†
Nicolas Oliveira
Decarli, 
b
Leonardo Evaristo
de Sousa,
c
Norimitsu
Tohnai,
a
Satoshi
Minakata,
a
Piotr
de Silva,
*c
Przemyslaw
Data
*be
and
Youhei
Takeda
*a
b
Leonardo Evaristo
de Sousa,
c
Norimitsu
Tohnai,
a
Satoshi
Minakata,
a
Piotr
de Silva,
*c
Przemyslaw
Data
*be
and
Youhei
Takeda
*a
Abstract
A new twisted donor–acceptor–donor (D–A–D) multi-photofunctional organic molecule comprising phenoselenazine as the electron donor (Ds) and dibenzo[a,j]phenazine (DBPHZ) as the electron acceptor (A) has been developed. The developed selenium-incorporated D–A–D compound features multi-color polymorphism, distinct mechanochromic luminescence, chemically-stimulated luminochromism, thermally-activated delayed fluorescence, and room-temperature phosphorescence. The internal heavy atom effect on the photophysical properties of the D–A–D system has been investigated through a comparison with the physicochemical properties of a previously developed sulfur analogue and a tellurium analogue.
![Graphical abstract: Revealing the internal heavy chalcogen atom effect on the photophysics of the dibenzo[a,j]phenazine-cored donor–acceptor–donor triad](/en-ph/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D1TC02635F&imageInfo.ImageIdentifier.Year=2021)
- This article is part of the themed collection: 2021 Journal of Materials Chemistry C most popular articles
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