ArticleJournal of fluorescence2012
Intrinsic and extrinsic temperature-dependency of viscosity-sensitive fluorescent molecular rotors.
Article in Journal of fluorescence, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Crowder-specific modulation of hepatitis C virus NS3/4A protease activity and local structural dynamics.Protein science : a publication of the Protein Society · 2026Article
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- Sustainable assessment of ultrasound-assisted extraction of anthocyanins with bio-based solvents for upgrading grape pomace Cabernet Sauvignon derived from a winemaking process.Ultrasonics sonochemistry · 2025Article
- Synthesis of β-Pyridyl α-Amino Acids: Conformationally Sensitive Charge Transfer-Based Fluorophores.Organic letters · 2024Article
- Molecular rotors in haemoglobin and bovine serum albumin proteins.Journal of the Royal Society, Interface · 2022Article
- Disentangling Nano- and Macroscopic Viscosities of Aqueous Polymer Solutions Using a Fluorescent Molecular Rotor.The journal of physical chemistry letters · 2021Article
- A triazine-based BODIPY trimer as a molecular viscometer.Physical chemistry chemical physics : PCCP · 2016Article
- Unravelling the effect of temperature on viscosity-sensitive fluorescent molecular rotors.Chemical science · 2015Article
- Apparent shear sensitivity of molecular rotors in various solvents.Journal of fluorescence · 2015Article
- Fluorescence microscopy visualization of contacts between objects.Angewandte Chemie (International ed. in English) · 2015Article
- 2-Cyano-3-(2,3,6,7-tetra-hydro-1H,5H-benzo[ij]quinolizin-9-yl)prop-2-enoic acid dimethyl sulfoxide monosolvate.Acta crystallographica. Section E, Structure reports online · 2012Article
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4 authors.
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Abstract
Molecular rotors are a group of environment-sensitive fluorescent probes whose quantum yield depends on the ability to form twisted intramolecular charge-transfer (TICT) states. TICT formation is dominantly governed by the solvent's microviscosity, but polarity and the ability of the solvent to form hydrogen bonds play an additional role. The relationship between quantum yield ϕ(F) and viscosity η is widely accepted as a power-law, ϕ(F) = C · η(x). In this study, we isolated the direct influence of the temperature on the TICT formation rate by examining several molecular rotors in protic and aprotic solvents over a range of temperatures. Each solvent's viscosity was determined as a function of temperature and used in the above power-law to determine how the proportionality constant C varies with temperature. We found that the power-law relationship fully explains the variations of the measured steady-state intensity by temperature-induced variations of the solvent viscosity, and C can be assumed to be temperature-independent. The exponent x, however, was found to be significantly higher in aprotic solvents than in protic solvents. We conclude that the ability of the solvent to form hydrogen bonds has a major influence on the relationship between viscosity and quantum yield. To use molecular rotors for the quantitative determination of viscosity or microviscosity, the exponent x needs to be determined for each dye-solvent combination.
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