Sensing Viscosity Decoupling and Dynamic Heterogeneity in Tetrabutylammonium Bromide:Polyol Deep Eutectic Solvents.
- 1Michigan State University , Department of Chemistry, East Lansing, Michigan48824-1322, United States.
- 2University of Missouri-Columbia, Department of Chemistry, Columbia, Missouri65211, United States.
Abstract
We report the reorientation dynamics of the chromophores resorufin and perylene in tetrabutylammonium bromide (TBAB)-based deep eutectic solvent (DES) systems formed with ethylene glycol (EG), 1,3-propanediol (PD), and 1,4-butanediol (BD) across a series of constituent ratios for each DES system. The reorientation dynamics of both chromophores are largely independent of the bulk viscosity of the DESs, consistent with viscosity decoupling and dynamic heterogeneity. This behavior suggests that the characteristic domains sampled by the chromophores are larger than their hydrodynamic volumes. For the polar chromophore resorufin, the results provide evidence for relatively strong interactions with TBA+ in the TBAB:PD and TBAB:BD systems, but not in TBAB:EG, suggesting competitive interactions between hydrogen-bond-acceptor-rich domains and hydrogen-bond-donor-rich domains. TBAB-based DESs, therefore, differ from choline chloride-based DESs primarily because TBAB lacks the primary alcohol functionality present in choline chloride.
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BibTeX
@article{wendel2026sensing,
title = {{Sensing Viscosity Decoupling and Dynamic Heterogeneity in Tetrabutylammonium Bromide:Polyol Deep Eutectic Solvents.}},
author = {Andrew J Wendel and Gary A Baker and G J Blanchard},
journal = {The journal of physical chemistry. B},
year = {2026},
month = oct,
doi = {10.1021/acs.jpcb.6c03764},
url = {https://europepmc.org/article/MED/42916705},
note = {CC BY},
}
RIS
TY - JOUR
TI - Sensing Viscosity Decoupling and Dynamic Heterogeneity in Tetrabutylammonium Bromide:Polyol Deep Eutectic Solvents.
AU - Andrew J Wendel
AU - Gary A Baker
AU - G J Blanchard
PY - 2026
DA - 2026/10/01
JO - The journal of physical chemistry. B
DO - 10.1021/acs.jpcb.6c03764
UR - https://europepmc.org/article/MED/42916705
AB - We report the reorientation dynamics of the chromophores resorufin and perylene in tetrabutylammonium bromide (TBAB)-based deep eutectic solvent (DES) systems formed with ethylene glycol (EG), 1,3-propanediol (PD), and 1,4-butanediol (BD) across a series of constituent ratios for each DES system. The reorientation dynamics of both chromophores are largely independent of the bulk viscosity of the DESs, consistent with viscosity decoupling and dynamic heterogeneity. This behavior suggests that the characteristic domains sampled by the chromophores are larger than their hydrodynamic volumes. For the polar chromophore resorufin, the results provide evidence for relatively strong interactions with TBA+ in the TBAB:PD and TBAB:BD systems, but not in TBAB:EG, suggesting competitive interactions between hydrogen-bond-acceptor-rich domains and hydrogen-bond-donor-rich domains. TBAB-based DESs, therefore, differ from choline chloride-based DESs primarily because TBAB lacks the primary alcohol functionality present in choline chloride.
SN - 1520-6106
SN - 1520-5207
ER -