Renaissance of Organic Triboluminescent Materials

Mukherjee, S and Thilagar, P (2019) Renaissance of Organic Triboluminescent Materials. In: Angewandte Chemie - International Edition .

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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. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Item Type:	Journal Article
Publication:	Angewandte Chemie - International Edition
Publisher:	Wiley-VCH Verlag
Additional Information:	Copyright for this article belongs to Wiley-VCH Verlag
Keywords:	Crystal structure; Fluorescence; Ground state; Molecules; Phosphorescence, Active material; Characterization procedures; Neighboring molecules; Noncentrosymmetric space groups; Organic crystal; Pyroelectric effect; Solid state emission; Stimuli-responsive materials, Triboluminescence
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	16 Apr 2019 06:44
Last Modified:	16 Apr 2019 06:44
URI:	http://eprints.iisc.ac.in/id/eprint/62110

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