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Solid-State Fluorescent Materials Based on Coumarin Derivatives: Polymorphism, Stimuli-Responsive Emission, Self-Assembly and Optical Waveguides

Abstract

Solid-state fluorescent materials have attracted a surge of interests in recent years due to their wide applications in the field of photoelectric devices, memory storages and fluorescent probes. Compared to synthesis of new molecules, digging new properties from known molecules is a facile approch to obtain functionalized fluorescent materials. In this report, we systematically explored the solid-state photoluminescent properties and applications of 7-(diethylamino)coumarin-3-aldehyde (DCA) and 7-(diethylamino)coumarin-3-carboxylic acid (DCCA). Two fluorophores exhibited special concentration-dependent emission effect. They gave polymorphism dependent solid-state emission and single crystal analysis revealed that enhanced overlap between neighbouring molecules resulted in the red-shifted emission. The crystal-to-crystal transfromation has also been achieved for both DCA and DCCA by employing exteral thermal treatment. In addition, the solid powder of DCA and DCCA displayed fluorescent response to HCl and NH3 gas with high sensitivity. Furthermore, 1D micromaterials were assemblied for both fluorophores and DCA exhibited outstanding optical waveguide behavior.

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Publication details

The article was received on 28 Dec 2017, accepted on 05 Feb 2018 and first published on 06 Feb 2018


Article type: Research Article
DOI: 10.1039/C7QM00617A
Citation: Mater. Chem. Front., 2017, Accepted Manuscript
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    Solid-State Fluorescent Materials Based on Coumarin Derivatives: Polymorphism, Stimuli-Responsive Emission, Self-Assembly and Optical Waveguides

    R. R. Cui, Y. C. Lv, Y. S. Zhao, N. Zhao and N. Li, Mater. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QM00617A

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