Abstract
Absorption spectra of methylene violet Bernthsen (MVB) are reported, obtained in normal alcohols, methanol through 1-octanol, and at different temperatures, 15 °C to 75 °C. Two distinct absorption intensities are apparent. The 565 nm intensity increases relative to the 598 nm intensity as alcohol chain length increases. For each solvent, increasing temperature causes similar intensity ratio effects. Computational spectra of MVB in methanol indicates a decrease in hydrogen-bonding as temperature increases with a corresponding loss of intensity in the low energy peak consistent with the experimental observations. Hydrogen-bonding is indicated as playing a role in the alcoholic solvent effects.
| Original language | English |
|---|---|
| Article number | 141167 |
| Journal | Chemical Physics Letters |
| Volume | 841 |
| DOIs | |
| State | Published - Apr 16 2024 |
Funding
The authors wish to thank the University of South Carolina Aiken and the Department of Chemistry and Physics for their financial, laboratory, and administrative support. MF acknowledges the Aiken Partnership for providing financial support in the form of an Endowed Chair in the Sciences from an anonymous source. The authors would like to acknowledge the high-performance computing resources provided by the Research Computing Program under the Division of Information Technology at the University of South Carolina. These funding sources played no role in this work other than those listed. Two authors, JR and AK, acknowledge the Magellan Scholars program sponsored by the University of South Carolina System for its support of their undergraduate research. We also thank several research students who, during their undergraduate careers, explored other solute and solvent systems. They are Patrick Shaw, Alyssa Gadsden, Brittany N. Smith, Jordan N. Ziegler, and Hillary Stewart. The authors wish to thank the University of South Carolina Aiken and the Department of Chemistry and Physics for their financial, laboratory, and administrative support. MF acknowledges the Aiken Partnership for providing financial support in the form of an Endowed Chair in the Sciences from an anonymous source. The authors would like to acknowledge the high-performance computing resources provided by the Research Computing Program under the Division of Information Technology at the University of South Carolina. These funding sources played no role in this work other than those listed. Two authors, JR and AK, acknowledge the Magellan Scholars program sponsored by the University of South Carolina System for its support of their undergraduate research. We also thank several research students who, during their undergraduate careers, explored other solute and solvent systems. They are Patrick Shaw, Alyssa Gadsden, Brittany N. Smith, Jordan N. Ziegler, and Hillary Stewart.
| Funders | Funder number |
|---|---|
| Division of Information Technology | |
| University of South Carolina System | |
| University of South Carolina |
Keywords
- Absorption Spectroscopy
- Computational Spectroscopy
- Methylene Violet Bernthsen
- Solvent Dependence
- Temperature Dependence