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American Chemical Society, Crystal Growth and Design, 2(13), p. 460-464, 2013

DOI: 10.1021/cg301656x

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Polymorphism-Triggered Reversible Thermochromic Fluorescence of a simple 1,8-Naphthyridine

Journal article published in 2013 by Antonio Fernández Mato, Marcos D. García, Carlos Peinador, José M. Quintela, Manuel Sánchez Andújar ORCID, Breogán Pato Doldán ORCID, M. Antonia Señarís Rodríguez, M. Antonia Señarís Rodríguez ORCID, Daniel Tordera, Henk J. Bolink
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This paper is available in a repository.

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Abstract

The fluorescent behavior in the solid state of a naphthyridine-based donor-acceptor heterocycle is presented. Synthesized as a crystalline blue-emissive solid (Pbca), the compound can easily be transformed in its P2(1)/c polymorphic form by heating. The latter material shows blue to cyan emission switching triggered by a reversible thermally induced phase transformation. This fact, the reversible acidochromism, and the strong anisotropic fluorescence of the compound in the solid state, account for the potential of 1,8-naphthyridines as simple and highly tunable organic compounds in materials science.