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Supramolecular Oligourethane Gel with Multicolor Luminescence Controlled by Mechanically Sensitive Hydrogen-Bonding

Jiang, Nan; Ruan, Shi-Hao; Liu, Xing-Man; Zhu, Dongxia; Li, Bing; Bryce, Martin R.

Supramolecular Oligourethane Gel with Multicolor Luminescence Controlled by Mechanically Sensitive Hydrogen-Bonding Thumbnail


Authors

Nan Jiang

Shi-Hao Ruan

Xing-Man Liu

Dongxia Zhu

Bing Li



Abstract

We report a new type of mechanically sensitive multicolor luminescent oligourethane gel (OUA-gel). The conformation of the oligomeric chains can be controlled by changing the strength of hydrogen bonds. The optical properties of the oligomers are highly dependent on the conformations which vary in response to mechanical stresses and phase transitions. The design relies on the introduction of a single mechanical chromophore, aurintricarboxylic acid, with propeller-like, spatially crowded, and highly twisted conformations, and the presence of three carboxyl groups, which provide multidirectional hydrogen-bonding opportunities. Introducing dimethylsulfoxide (DMSO) as an additional H-bond acceptor molecule leads to a viscous OUA-gel which exhibits multiemission colors because of changes in the chain conformation within the matrix, which are induced by different strengths of H bonds. The conformation can be adjusted by mechanical force or temperature, both of which influence the H-bonding. The multifunctional and multicolored mechanochromism of the OUA-gel has great promise in sensing applications. The results represent a substantial step toward understanding the mechanism of polychromism in soft materials and the molecular design of advanced smart materials.

Citation

Jiang, N., Ruan, S., Liu, X., Zhu, D., Li, B., & Bryce, M. R. (2020). Supramolecular Oligourethane Gel with Multicolor Luminescence Controlled by Mechanically Sensitive Hydrogen-Bonding. Chemistry of Materials, 32(13), 5776-5784. https://doi.org/10.1021/acs.chemmater.0c01620

Journal Article Type Article
Online Publication Date Jun 30, 2020
Publication Date Jul 14, 2020
Deposit Date Jul 3, 2020
Publicly Available Date Jul 3, 2020
Journal Chemistry of Materials
Print ISSN 0897-4756
Electronic ISSN 1520-5002
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 32
Issue 13
Pages 5776-5784
DOI https://doi.org/10.1021/acs.chemmater.0c01620
Public URL https://durham-repository.worktribe.com/output/1267511

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Advance online version This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.






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