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https://hdl.handle.net/2440/59976
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Type: | Journal article |
Title: | Excited-state intramolecular hydrogen atom transfer of curcumin in surfactant micelles |
Author: | Adhikary, R. Carlson, P. Kee, T. Petrich, J. |
Citation: | The Journal of Physical Chemistry B: Biophysical Chemistry, Biomaterials, Liquids, and Soft Matter, 2010; 114(8):2997-3004 |
Publisher: | Amer Chemical Soc |
Issue Date: | 2010 |
ISSN: | 1520-6106 1520-5207 |
Statement of Responsibility: | Ramkrishna Adhikary, Philip J. Carlson, Tak W. Kee and Jacob W. Petrich |
Abstract: | Femtosecond fluorescence upconversion experiments were performed on the naturally occurring medicinal pigment, curcumin, in anionic, cationic, and neutral micelles. In our studies, the micelles are composed of sodium dodecyl sulfate (SDS), dodecyl trimethyl ammonium bromide (DTAB), and triton X-100 (TX-100). We demonstrate that the excited-state kinetics of curcumin in micelles have a fast (3-8 ps) and slow (50-80 ps) component. While deuteration of curcumin has a negligible effect on the fast component, the slow component exhibits a pronounced isotope effect of approximately 1.6, indicating that micelle-captured curcumin undergoes excited-state intramolecular hydrogen atom transfer. Studies of solvation dynamics of curcumin in a 10 ps time window reveal a fast component (< or = 300 fs) followed by a 8, 6, and 3 ps component in the solvation correlation function for the TX-100, DTAB, and SDS micelles, respectively. |
Keywords: | Hydrogen Sodium Dodecyl Sulfate Octoxynol Curcumin Surface-Active Agents Spectrometry, Fluorescence Spectrophotometry, Ultraviolet Micelles Time Factors Quaternary Ammonium Compounds |
Rights: | Copyright © 2010 American Chemical Society |
DOI: | 10.1021/jp9101527 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1021/jp9101527 |
Appears in Collections: | Aurora harvest Environment Institute publications Physics publications |
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