Piezochromic Behavior of 2,4,6-Triphenylpyrylium Tetrachloroferrate

Authors

Princess Canasa, University of Nevada Las Vegas
David King, University of Nevada Las Vegas
Petrika Cifligu, University of Nevada Las Vegas
Adrian F. Lua Sanchez, University of Nevada Las Vegas
Si L. Chen, University of Nevada Las Vegas
Haesook Han, University of Nevada Las VegasFollow
Trimaan Malik, University of Nevada Las Vegas
Brant Billinghurst, University of Saskatchewan
Jianbao Zhao, University of Saskatchewan
Changyong Park, Argonne National Laboratory
George R. Rossman, California Institute of Technology
Michael Pravica, University of Nevada, Las VegasFollow
Pradip K. Bhowmik, University of Nevada, Las VegasFollow
Egor Evlyukhin, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

4-26-2024

Publication Title

Small Science

Publisher

Wiley

First page number:

1

Last page number:

7

Abstract

In advanced photonics, there is a growing interest in piezochromic luminescent materials that exhibit multicolor switching, driven by their potential applications in optical recording, memory, and sensors. Here, the piezochromic behavior of 2,4,6-triphenylpyrylium tetrachloroferrate (Py-FeCl₄) under high pressures from 0 to 9 GPa is reported. The observed multicolor changing properties of Py-FeCl₄ (yellow–orange–red–maroon–black) are found to be fully reversible upon decompression to ambient conditions. The mechanism of Py-FeCl₄ piezochromism is investigated via Raman, infrared, and UV–vis spectroscopy combined with powder X-ray Diffraction. The absence of structural phase transitions as well as the abrupt shifts of bandgap values together with characteristic Raman and IR peaks within 0-9 GPa suggests that the Py-FeCl₄ multicoloring switching behavior is driven by an electron transfer between the inorganic FeCl₄⁻ anion and the organic pyrylium cation. The obtained results demonstrate that Py-FeCl₄ dye is a good candidate for developing high-pressure sensing technologies designed to function in extreme environments. Moreover, due to the inherent role of molecular-structure relationships in the pyrylium salt's photophysical properties, findings suggest the potential discovery of piezochromic behavior in other pyrylium compounds.

Keywords

diamond anvil cells; high pressures; piezochromic; pyrylium salts

Controlled Subject

Color; High pressure (Science)

Disciplines

Chemistry | Physics

File Format

pdf

File Size

200 KB

Language

English

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.

Repository Citation

Canasa, P., King, D., Cifligu, P., Lua Sanchez, A. F., Chen, S. L., Han, H., Malik, T., Billinghurst, B., Zhao, J., Park, C., Rossman, G. R., Pravica, M., Bhowmik, P. K., Evlyukhin, E. (2024). Piezochromic Behavior of 2,4,6-Triphenylpyrylium Tetrachloroferrate. Small Science 1-7. Wiley.
http://dx.doi.org/10.1002/smsc.202400106