How critical micelle temperature influences rotational diffusion of hydrophobic probes solubilized in aqueous triblock copolymer solutions
Article Abstract:
Rotational diffusion of two structurally similar hydrophobic probes, 2,5-dimethyl-1,4-dioxo-3,6-diphenylpyrrolo-[3,4-c]pyrrole (DMDPP) and 1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DPP), are examined in aqueous solutions of poly(ethylene oxide)(sub 20)-poly(propylene oxide)(sub 70)-poly(ethylene oxide3)(sub 20) triblock copolymer as a function of temperature. It is observed that, below cmt, the anisotropy decays can be adequately described by single-exponential functions with one time constant each for DMDPP and DPP.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Rotational diffusion of hydrophobic probes in Brij-35 micelles: Effect of temperature on micellar internal environment
Article Abstract:
Rotational diffusion of two structurally similar hydrophobic probes, 2,5-dimethyl-1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DMDPP) and 1,4-dioxo-3,6-diphenylpyrrolo[3,4-c] pyrrole (DPP) in nonionic Brij-35 micelles as a function of temperature to explore the micellar internal environment is studied. Results show that the anisotrophy decays of both the probes are described by biexponential functions with two time constants.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
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Does the onset of water droplet formation alter the microenvironment of the hydrophobic probes solubilized in nonionic reverse micelles?
Article Abstract:
The steady-state and time-resolved fluorescence depolarization methods are used to measure the rotational diffusion of the probes in the surfactant Triton X-100 (TX-100)/benzene-hexane reverse micelles. The result obtained from these measurements implies that the respective microenvironments experienced by the probes remain the same with the onset of water droplet formation.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
User Contributions:
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