Volume 61, Issue 1 e202112290
Research Article
Free to Read

Density-Dependent Emission Colors from a Conformation-Switching Chromophore in Polyurethanes

Dr. Junwei Wang

Dr. Junwei Wang

School of Materials Science and Engineering, Experimental Centre of Advanced Materials, Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081 China

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Rui Yan

Rui Yan

School of Materials Science and Engineering, Experimental Centre of Advanced Materials, Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081 China

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Yaofang Hu

Yaofang Hu

School of Materials Science and Engineering, Experimental Centre of Advanced Materials, Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081 China

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Guoshuai Du

Guoshuai Du

School of Aerospace Engineering, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, 100081 China

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Guanming Liao

Guanming Liao

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Huanzhi Yang

Huanzhi Yang

School of Materials Science and Engineering, Experimental Centre of Advanced Materials, Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081 China

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Prof. Dr. Yunjun Luo

Prof. Dr. Yunjun Luo

School of Materials Science and Engineering, Experimental Centre of Advanced Materials, Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081 China

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Prof. Dr. Xiaoyan Zheng

Corresponding Author

Prof. Dr. Xiaoyan Zheng

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Prof. Yabin Chen

Corresponding Author

Prof. Yabin Chen

School of Aerospace Engineering, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, 100081 China

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Prof. Dr. Suning Wang

Prof. Dr. Suning Wang

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Prof. Dr. Xiaoyu Li

Corresponding Author

Prof. Dr. Xiaoyu Li

School of Materials Science and Engineering, Experimental Centre of Advanced Materials, Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081 China

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First published: 03 November 2021
Citations: 23

In memory of Professor Sunning Wang

Graphical Abstract

Full-color emission is achieved from a single fluorescent component by incorporating it into polyurethane matrices. Facilitated by the chemical structure of polyurethanes, the emission color could be modulated from blue to red by simply tuning the density of the chromophores, via either synthetic or physical approaches.

Abstract

Achieving full-color emission from a single chromophore is not only highly desirable from practical considerations, but also greatly challenging for fundamental research. Herein, we demonstrated the density-dependent emission colors from a single boron-containing chromophore, from which multi-color fluorescent polyurethanes were prepared as well. Originating from its switchable molecular conformations, the emission color of the chromophore was found to be governed by the packing density and strongly influenced by hydrogen bonding interactions. The chromophore was incorporated into polyurethanes to achieve full-color emitting materials; the emission color was only dependent on the chromophore density and could be tuned via synthetic approach by controlling the compositions. The emission colors could also be modulated by physical approaches, including by swelling/deswelling process, compression under high pressure, and even blending the fluorescent polyurethane with non-emitting ones.

Conflict of interest

The authors declare no conflict of interest.

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