Does Solvent Influence the Ground-state Tautomeric Population of Hypericin?¶

J. Wen; P. Chowdhury; D. B. Fulton; A. Datta; K. Das; A. H. Andreotti; J. W. Petrich

doi:10.1562/0031-8655(2003)077<0005:DSITGS>2.0.CO;2

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J. Wen,¹ P. Chowdhury,¹ D. B. Fulton,² A. Datta,¹ K. Das,¹ A. H. Andreotti,² J. W. Petrich^1,*

¹aDepartment of Chemistry, Iowa State University, Ames, IA
²bDepartment of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA

^**To whom correspondence should be addressed at: Department of Chemistry, Iowa State University, Ames, IA 50011, USA. Fax: 515-294-0105; jwp@iastate.edu

Abstract

Nuclear magnetic resonance measurements indicate that hypericin exists in the same “normal” tautomeric form irrespective of whether the solvent is dimethyl sulfoxide or tetrahydrofuran. This result is discussed in the context of previous experimental and theoretical work. It is concluded that solvent perturbations cannot induce tautomerization in hypericin.

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J. Wen, P. Chowdhury, D. B. Fulton, A. Datta, K. Das, A. H. Andreotti, and J. W. Petrich "Does Solvent Influence the Ground-state Tautomeric Population of Hypericin?," Photochemistry and Photobiology 77(1), 5-9, (1 January 2003). https://doi.org/10.1562/0031-8655(2003)077<0005:DSITGS>2.0.CO;2

Received: 21 May 2002; Accepted: 1 October 2002; Published: 1 January 2003

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