Manipulation of Molecular Aggregation States to Realize Polymorphism, AIE, MCL, and TADF in a Single Molecule

Multifunctional emitting materials are scarce and need to be further explored. Now, a newly anthraquinone derivative, 2‐(phenothiazine‐10‐yl)‐anthraquinone (PTZ‐AQ) was designed and synthesized and found to demonstrate polymorphism, multi‐color emission, aggregation‐induced emission (AIE), mechanoch...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie International Edition 2018-09, Vol.57 (38), p.12473-12477
Main Authors: Huang, Bin, Chen, Wen‐Cheng, Li, Zijing, Zhang, Jinfeng, Zhao, Weijun, Feng, Yan, Tang, Ben Zhong, Lee, Chun‐Sing
Format: Article
Language:English
Subjects:
Agglomeration
aggregation-induced emission
Anthraquinone
Emission
Fluorescence
mechanochromic luminescence
Mechanoluminescence
multicolor emission
Organic materials
Phenothiazine
Photoluminescence
Photons
Polymorphism
thermally activated delayed fluorescence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Multifunctional emitting materials are scarce and need to be further explored. Now, a newly anthraquinone derivative, 2‐(phenothiazine‐10‐yl)‐anthraquinone (PTZ‐AQ) was designed and synthesized and found to demonstrate polymorphism, multi‐color emission, aggregation‐induced emission (AIE), mechanochromic luminescence (MCL), and thermally activated delayed fluorescence (TADF) in its different solid forms. It is shown for the first time that TADF properties of a compound can be systematically tuned via its aggregation state. The optimized PTZ‐AQ crystal shows a small singlet–triplet energy splitting of 0.01 eV and exhibits red TADF with a photoluminescence quantum yield as high as 0.848. This study shows that the unique multiple functions can be integrated into one single compound through controlling the aggregation states, which provides a new strategy for the investigation and application of multifunctional organic materials. An anthraquinone derivative demonstrates polymorphism, aggregation‐induced emission (AIE), mechanochromic luminescence (MCL), and thermally activated delayed fluorescence (TADF) in its different solid forms. The optimized PTZ‐AQ crystal exhibits red TADF with a small singlet–triplet energy offset of 0.01 eV and with a high photoluminescence quantum yield of 0.848.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201806800