Issue 48, 2021
From the journal:

Chemical Science

An unexpected non-conjugated AIEgen with a discrete dimer for pure intermolecular through-space charge transfer emission†

Xiujie Jiang,‡a   Wei Tao,‡a   Cheng Chen,a   Guoyong Xu,a   Haoke Zhang ORCID logo *bcd  and  Peifa Wei ORCID logo *ad  

* Corresponding authors

a Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Anhui University, Hefei, China
E-mail: pfwei@ahu.edu.cn

b MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China

c ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
E-mail: zhanghaoke@zju.edu.cn

d Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, China

Abstract

Manipulation of the charge transfer in donor–acceptor-type molecules is essential for the design of controllable aggregate luminescent materials. Apart from the traditional through-bond charge transfer (TBCT) systems which suffer from complicated structural design, poor tunability and low quantum efficiency, through-space charge transfer (TSCT) has been proved as an alternative yet facile strategy in tuning photophysical processes. In this work, by simply changing nucleophilic reaction bases, a traditional conjugated acrylonitrile AP1 and an unexpected non-conjugated AP2 with a carboxamide-functionalized oxirane linker could be obtained. The long-range π–π stacking in conjugated AP1 results in mixed intramolecular TBCT plus intermolecular TSCT emission. However, facilitated by the steric hindrance effect of the big oxirane connector and the unique discrete dimer packing, non-conjugated AP2 exhibits pure and efficient intermolecular TSCT emission in both aggregate and crystalline states. The flexibility of the non-conjugated character further leads to better reversible stimuli-responsiveness to mechanical force for AP2 than for the rigid AP1.

Graphical abstract: An unexpected non-conjugated AIEgen with a discrete dimer for pure intermolecular through-space charge transfer emission

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Article information

DOI
https://doi.org/10.1039/D1SC05426K
Article type
Edge Article
Submitted
03 Oct 2021
Accepted
21 Nov 2021
First published
22 Nov 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2021,12, 15928-15934

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An unexpected non-conjugated AIEgen with a discrete dimer for pure intermolecular through-space charge transfer emission

X. Jiang, W. Tao, C. Chen, G. Xu, H. Zhang and P. Wei, Chem. Sci., 2021, 12, 15928 DOI: 10.1039/D1SC05426K

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