ArticleThe journal of physical chemistry letters2021
Disentangling Nano- and Macroscopic Viscosities of Aqueous Polymer Solutions Using a Fluorescent Molecular Rotor.
Article in The journal of physical chemistry letters, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Article
- Molecular Rotors: Fluorescent Sensors for Microviscosity and Conformation of Biomolecules.Angewandte Chemie (International ed. in English) · 2024Review
- Visualization of the Sol-Gel Transition in Porous Networks Using Fluorescent Viscosity-Sensitive Probes.The journal of physical chemistry letters · 2024Article
- Article
- Sustainable natural chlorogenic acid as a functional molecular sensor toward viscosity detection in liquids.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2023Article
- Surface-Mediated Molecular Transport of a Lipophilic Fluorescent Probe in Polydisperse Oil-in-Water Emulsions.Langmuir : the ACS journal of surfaces and colloids · 2023Article
- Directly imaging emergence of phase separation in peroxidized lipid membranes.Communications chemistry · 2023Article
- Adsorption of a water-soluble molecular rotor fluorescent probe on hydrophobic surfaces.Scientific reports · 2022Article
Corrections and comments
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Authors and funding
5 authors.
Funding
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Abstract
The macroscopic viscosity of polymer solutions in general differs strongly from the viscosity at the nanometer scale, and the relation between the two can be complicated. To investigate this relation, we use a fluorescent molecular rotor that probes the local viscosity of its molecular environment. For a range of chain lengths and concentrations, the dependence of the fluorescence on the macroscopic viscosity is well described by the classical Förster-Hoffmann (FH) equation, but the value of the FH exponent depends on the polymer chain length. We show that all data can be collapsed onto a master curve by plotting the fluorescence versus polymer concentration, which we explain in terms of the characteristic mesh size of the polymer solution. Using known scaling laws for polymers then allows us to quantitatively explain the relation between the FH exponent and the polymer chain length, allowing us to link the nano- to the macroviscosity.
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Registered trials
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