Journal
COLLOID AND POLYMER SCIENCE
Volume 291, Issue 10, Pages 2375-2384Publisher
SPRINGER
DOI: 10.1007/s00396-013-2986-x
Keywords
Alkyltriphenylphonium bromides; Aggregation behavior; Protic; Aprotic; Ionic liquid
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Funding
- National Basic Research Program [2009CB930101]
- National Natural Science Foundation of China [91127017]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120131130003]
- Shandong Provincial Natural Science Foundation, China [ZR2012BZ001]
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The aggregation behavior of alkyltriphenylphonium bromides, C (n) TPB (n = 12 and 14), has been investigated in two different room-temperature ionic liquids (ILs), the aprotic 1-butyl-3-metyllimidazolium tetrafluoroborate ([bmim][BF4]), and the protic ethylammonium nitrate (EAN). The critical micelle concentration was determined by the surface tension measurements. The calculated thermodynamic parameters based on surface tension measurements at various temperatures indicate that the micellization for C (n) TPB in both aprotic [bmim][BF4] and protic EAN is enthalpy-driven. But stronger solvophobic interactions presented between C (n) TPB and protic EAN than aprotic [bmim][BF4]. H-1 NMR spectra were further conducted to reveal that ethylammonium cation can insert into the micelle while imidazole cation only locates among the head groups of C (n) TPB.
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