Campus Units

Chemistry

Document Type

Article

Publication Version

Published Version

Publication Date

2-5-2010

Journal or Book Title

Journal of Physical Chemistry B

Volume

114

Issue

8

First Page

2997

Last Page

3004

DOI

10.1021/jp9101527

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 ∼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 (≤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.

Comments

Reprinted (adapted) with permission from Journal of Physical Chemistry B 114 (2010): 2997, doi: 10.1021/jp9101527. Copyright 2010 American Chemical Society.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

Included in

Chemistry Commons

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