Multiple yet switchable hydrogen-bonded organic frameworks with white-light emission

Yadong Shi, Shuodong Wang, Wei Tao, Jingjing Guo, Sheng Xie, Yanglan Ding, Guoyong Xu, Cheng Chen, Xiaoyu Sun, Zengming Zhang, Zikai He, Peifa Wei () and Ben Zhong Tang ()
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Yadong Shi: 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
Shuodong Wang: Hunan University
Wei Tao: 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
Jingjing Guo: South China University of Technology
Sheng Xie: Hunan University
Yanglan Ding: 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
Guoyong Xu: 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
Cheng Chen: 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
Xiaoyu Sun: University of Science and Technology of China
Zengming Zhang: University of Science and Technology of China
Zikai He: Harbin Institute of Technology
Peifa Wei: 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
Ben Zhong Tang: Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract The development of new strategies to construct on-demand porous lattice frameworks from simple motifs is desirable. However, mitigating complexity while combing multiplicity and reversibility in the porous architectures is a challenging task. Herein, based on the synergy of dynamic intermolecular interactions and flexible molecular conformation of a simple cyano-modified tetraphenylethylene tecton, eleven kinetic-stable hydrogen-bonded organic frameworks (HOFs) with various shapes and two thermo-stable non-porous structures with rare perpendicular conformation are obtained. Multimode reversible structural transformations along with visible fluorescence output between porous and non-porous or between different porous forms is realized under different external stimuli. Furthermore, the collaborative of flexible framework and soft long-chain guests facilitate the relaxation from intrinsic blue emission to yellow emission in the excited state, which represents a strategy for generating white-light emission. The dynamic intermolecular interactions, facilitated by flexible molecular conformation and soft guests, diversifies the strategies of construction of versatile smart molecular frameworks.

Date: 2022
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DOI: 10.1038/s41467-022-29565-1

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