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Hydrostatic Pressure-Induced Spectral Variation of Reichardt’s Dye: A Polarity/Pressure Dual Indicator

Lookup NU author(s): Dr Julien EngORCiD, Professor Thomas Penfold

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This is the final published version of an article that has been published in its final definitive form by American Chemical Society, 2020.

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Abstract

The famous solvatochromic Reichardt’s dye was applied to quantify hydrostatic pressure in media. The UV/vis spectra of the dye in various organic solvents are shifted bathochromically or hypsochromically at the shorter- or longer-wavelength band, respectively, upon hydrostatic pressurization. The E_T value, determined by an absorption maximum, in ethyl acetate increases from 38.5 kcal mol^–1 at 0.1 MPa to 39.2 kcal mol^–1 at 300 MPa, which is mostly equal to the one in chloroform at 0.1 MPa. These spectroscopic origins were supported by the time-dependent density functional theory (TD-DFT) calculations. The concept and approach proposed in this paper, i.e., a dual indicator, should attract the attention of a broad spectrum in multidisciplinary science.

Publication metadata

Author(s): Miyagawa A, Eng J, Okada T, Inoue Y, Penfold TJ, Fukuhara G

Publication type: Article

Publication status: Published

Journal: ACS Omega

Year: 2020

Volume: 5

Issue: 1

Pages: 897-903

Print publication date: 14/01/2020

Online publication date: 26/12/2019

Acceptance date: 10/12/2019

Date deposited: 29/12/2019

ISSN (electronic): 2470-1343

Publisher: American Chemical Society

URL: https://doi.org/10.1021/acsomega.9b03880

DOI: 10.1021/acsomega.9b03880

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