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Blue-emitting thermoreversible oligourethane gelators with aggregation-induced emission properties

Jiang, Nan; Zhu, Dongxia; Su, Zhongmin; Bryce, Martin R.

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Authors

Nan Jiang

Dongxia Zhu

Zhongmin Su



Abstract

Blue-emitting gels are scarce, especially oligomeric/polymeric systems. Here, a series of 4,4′-sulfonyldiphenol (SDP) based oligourethane derivatives (OUs), namely OUHDI, OUHMDI and OUTDI based on 1,6-hexamethylene diisocyanate, 4,4′-methylenebis(cyclohexyl isocyanate) and 2,4-diisocyanatotoluene, respectively, were rationally designed and obtained by simple procedures. The new oligomers all display aggregation-induced blue fluorescence and upon gelation they achieve enhanced bright deep-blue emission as a result of interchain hydrogen bonding and oxygen cluster interactions. The OUs show spontaneous thermoreversible gelation in solvents which possess hydrogen-bond receptor units (C[double bond, length as m-dash]O or S[double bond, length as m-dash]O) which facilitate self-assembly of the OU chains into nanotubes. The oligourethane gels (OUGs) possess excellent ability for resisting external stress while at the same time exhibiting a distinct viscous flow state. The results illustrate that heteroatomic non-conjugated oligomers with advantageous hydrogen bonding interactions and oxygen clusters provide an efficient route to photoluminescent blue-emitting gels. The thermoreversible OUGs with excellent mechanical properties have been exploited to make sticky coatings, transparent films and a blue fluorescent molded shape using simple fabrication processes.

Citation

Jiang, N., Zhu, D., Su, Z., & Bryce, M. R. (2020). Blue-emitting thermoreversible oligourethane gelators with aggregation-induced emission properties. Journal of Materials Chemistry C Materials for optical and electronic devices, 8(15), 5137-5142. https://doi.org/10.1039/d0tc00757a

Journal Article Type Article
Acceptance Date Mar 11, 2020
Online Publication Date Mar 20, 2020
Publication Date Apr 21, 2020
Deposit Date Mar 18, 2020
Publicly Available Date Mar 11, 2021
Journal Journal of Materials Chemistry C Materials for optical and electronic devices
Print ISSN 2050-7526
Electronic ISSN 2050-7534
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 8
Issue 15
Pages 5137-5142
DOI https://doi.org/10.1039/d0tc00757a

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