Navarro-Huerta, Armando;
Juarez-Calixto, Antonio;
Sandoval-Salinas, Maria Eugenia;
Amador-Sanchez, Yoarhy A;
Rodriguez-Hernandez, Joelis;
Nunez-Pineda, Alejandra;
Rodriguez, Mario;
... Rodriguez-Molina, Braulio; + view all
(2024)
Mechanochromic hydrogen-bonded cocrystals with a salient effect upon heating.
Materials Chemistry Frontiers
, 8
(20)
pp. 3331-3343.
10.1039/d4qm00421c.
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Abstract
Herein, we report the characterization of two hydrogen-bonded cocrystals, termed AC-TFTA and AC-PFBA, with mechanofluorochromism upon grinding. The heating of single crystals of AC-TFTA promotes microscopic displacements due to a decarboxylation process, which was studied through calorimetry-based techniques, gas chromatography/mass spectrometry, and hot-stage microscopy. Using solid-state nuclear magnetic resonance (ssNMR), powder X-ray diffraction (PXRD), and UV-Vis/fluorescence spectroscopy, we demonstrated that AC-TFTA displays sharper photophysical changes than its analog AC-PFBA, attributable to differences in the energies of their non-covalent interactions. Furthermore, the reversibility of the amorphous phase in both cocrystals was explored. However, fatigue tests led us to conclude that AC-TFTA displays potential for application as an anticounterfeiting agent, in contrast with the more robust crystalline AC-PFBA. This work emphasizes the importance of cocrystallization in generating accessible and functional mechanofluorochromic materials.
| Type: | Article |
|---|---|
| Title: | Mechanochromic hydrogen-bonded cocrystals with a salient effect upon heating |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d4qm00421c |
| Publisher version: | https://doi.org/10.1039/d4qm00421c |
| Language: | English |
| Keywords: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10204494 |
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