期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 1265, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2022.133435
关键词
benzothiadiazole-based derivatives; bipolar molecules; color-tunable emission; structure-properties relationship; aggregation-induced emission
资金
- National Natural Science Foundation of China [21975054]
- Natural Science Foundation of Guangdong Province of China [2019A1515010925]
- Guang-dong Provincial Key Laboratory of Information Photonics Tech-nology [2020B121201011]
- Open Fund of Guangdong Provin-cial Key Laboratory of Luminescence from Molecular Aggregates [2019B030301003]
- China (South China University of Technology) [2018TP1017]
- Science and Technology Planning Project of Hu-nan Province
This article presents two D-A-D type benzothiadiazole-based molecules with color-tunable emission, but they exhibit ACQ characteristic due to the strong influence of molecular aggregation.
Inspired by the advantages of long-wavelength emission of organic luminescence materials, this article presents two D-A-D type benzothiadiazole-based molecules with color-tunable emission from yellow to red via a suitable choice of the donor groups (phenyl/thiophenyl units). The optimized molecular structures indicated that the benzothiadiazole units are almost lying in a co-planer configuration with the donor groups, which would trend to strengthen the intermolecular interaction, resulting in a reasonable red-shifted emission with slightly fluorescence quenching. Thus, although the typical aggregation-induced emission (AIE) unit tetraphenylethene was introduced into those molecular skeletons, both compounds still display ACQ characteristic, due to the molecular aggregation via the strengthen intramolecular interaction (such as pi- pi stacking) could overwhelm the AIE effect. Thus, the large pi-conjugated with planar molecular skeletons is not beneficial for constructing highly efficient AIE molecules. (c) 2022 Elsevier B.V. All rights reserved.
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