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Renaissance of Organic Triboluminescent Materials

Mukherjee, Sanjoy and Thilagar, Pakkirisamy (2019) Renaissance of Organic Triboluminescent Materials. In: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 58 (24). pp. 7922-7932.

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Official URL: http:/dx.doi.org/10.1002/anie.201811542

Abstract

Solid-state luminescence of organic dyes is an elusive frontier, and understanding and designing solid-state stimuli-responsive materials is not trivial. ``Mechanoluminescence'' (ML) or ``triboluminescence'' (TL), which is associated with fracture or force-initiated luminescence from a material, is currently attracting new interest. Fracturing the surfaces of organic crystals ordered in noncentrosymmetric space groups can electronically excite the surface and neighboring molecules through piezo- or pyroelectric effects, and this can result in luminescence when the molecules relax back to their ground states. The combined duration of these two consecutive phenomena leads to force-generated luminescence or TL. Although TL has been known for a very long time, examples of TL-active materials are scarce, but are increasing as synthetic and characterization procedures develop. The question is now whether the relatively rare phenomenon of TL needs to be reevaluated to obtain a broader understanding of the subject.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to WILEY-V C H VERLAG GMBH
Keywords: crystal structure; fluorescence; phosphorescence; solid-state emission; triboluminescence
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 03 Dec 2019 09:55
Last Modified: 03 Dec 2019 09:55
URI: http://eprints.iisc.ac.in/id/eprint/63325

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