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Data for Examining solvent effects on the ultrafast dynamics of catechol
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Turner, M. A. P., Hine, Nicholas, Stavros, Vasilios G. and Horbury, Michael D. (2019) Data for Examining solvent effects on the ultrafast dynamics of catechol. [Dataset]
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Official URL: https://doi.org/10.5281/zenodo.3241438
Abstract
We consider the effect of a polar, hydrogen bond accepting, solvent environment on the excited state decay of catechol following excitation to its first excited singlet state (S1). A comparison of Fourier transform infrared spectroscopy and explicit-solvent ab initio frequency prediction suggests that 5 mM catechol in acetonitrile is both nonaggregated and in its “closed” conformation, contrary to what has been previously proposed. Using ultrafast transient absorption spectroscopy, we then demonstrate the effects of aggregation on the photoexcited S1 lifetime: at 5 mM catechol (nonaggregated) in acetonitrile, the S1 lifetime is 713 ps. In contrast at 75 mM catechol in acetonitrile, the S1 lifetime increases to 1700 ps. We attribute this difference to aggregation effects on the excited-state landscape. This work has shown that explicit-solvent methodology is key when calculating the vibrational frequencies of molecules in a strongly interacting solvent. Combining this with highly complementary steady-state and transient absorption spectroscopy enables us to gain key dynamical insights into how a prominent eumelanin building block behaves when in polar, hydrogen bond accepting solvents both as a monomer and as an aggregated species.
Item Type: | Dataset | |||||||||||||||||||||
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Subjects: | Q Science > QD Chemistry Q Science > QP Physiology |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Science > Physics |
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Type of Data: | Experimental data | |||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Catechol, Catechol -- Synthesis, Catechol -- Deterioration, Fourier transform infrared spectroscopy | |||||||||||||||||||||
Publisher: | University of Warwick, Department of Physics | |||||||||||||||||||||
Official Date: | 7 June 2019 | |||||||||||||||||||||
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Status: | Not Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Media of Output (format): | .csv .xyz .out .nw | |||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||
Copyright Holders: | University of Warwick | |||||||||||||||||||||
Description: | Data record consists of four .csv data files, a readme file, and a zip archive containing the computational data files in .xyz , .out and .nw format. |
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