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Solvation Dynamics and Rotation of Coumarin 153 in Alkylphosphonium Ionic Liquids
Abstract
Solvation and rotational dynamics of coumarin 153 (C153) were measured in a series of phosphonium ionic liquids consisting of the trihexyl(tetradecyl)phosphonium cation and the anions Br -, Cl -, dicyanamide -, bis(trifluoromethylsulfonyl)imide -, and BF 4 - . None of these liquids display a prominent ultrafast solvation component comparable to the one observed in imidizalium ionic liquids. The solvation dynamics observed on the nanosecond time scale are also 5-fold slower than those in imidazolium liquids of comparable viscosities. Both rotation and solvation are highly nonexponential functions of time and can be represented by stretched-exponential decays with exponents near 0.5. Characteristic times of these processes track solvent viscosity. A number of similarities between the dynamics observed in these ionic liquids and supercooled glass-forming liquids are noted.
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Citations
Cited by
Room-Temperature Ionic Liquids: Solvents for Synthesis and Catalysis. 2
Hallett, J. P., & Welton, T. (2011) · Chemical Reviews · doi:10.1021/cr1003248 · Cited by 12,578
Understanding Ionic Liquids at the Molecular Level: Facts, Problems, and Controversies
Weingärtner, H. (2008) · Angewandte Chemie International Edition · doi:10.1002/anie.200604951 · Cited by 1,543
Ionic liquids: solvent properties and organic reactivity
Chiappe, C., & Pieraccini, D. (2005) · Journal of Physical Organic Chemistry · doi:10.1002/poc.863 · Cited by 1,169
Phosphonium-Based Ionic Liquids: An Overview
Fraser, K. J., & MacFarlane, D. R. (2009) · Australian Journal of Chemistry · doi:10.1071/ch08558 · Cited by 536
Wakai, C., Oleinikova, A., Ott, M., & Weingärtner, H. (2005) · The Journal of Physical Chemistry B · doi:10.1021/jp053946+ · Cited by 531
Metadata
- Authors
- Ito, N., Arzhantsev, S., Heitz, M., & Maroncelli, M.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-04-14
- Volume
- 108
- Issue
- 18
- Pages
- 5771-5777
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2050291589
- Cited by
- 226
- References
- 0
- FWCI
- 15.14
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ito, N., Arzhantsev, S., Heitz, M., & Maroncelli, M. (2004). Solvation Dynamics and Rotation of Coumarin 153 in Alkylphosphonium Ionic Liquids. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp0499575
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