spectroscopic study of solvent effects on the electronic absorption spectra of flavone and 7-hydroxyflavone in neat and binary solvent mixtures光谱研究溶剂对黄酮的电子吸收光谱的影响和7-hydroxyflavone整洁和二进制溶剂混合物.pdfVIP

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spectroscopic study of solvent effects on the electronic absorption spectra of flavone and 7-hydroxyflavone in neat and binary solvent mixtures光谱研究溶剂对黄酮的电子吸收光谱的影响和7-hydroxyflavone整洁和二进制溶剂混合物.pdf

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spectroscopic study of solvent effects on the electronic absorption spectra of flavone and 7-hydroxyflavone in neat and binary solvent mixtures光谱研究溶剂对黄酮的电子吸收光谱的影响和7-hydroxyflavone整洁和二进制溶剂混合物

Int. J. Mol. Sci. 2011, 12, 8895-8912; doi:10.3390/ijm OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 /journal/ijms Article Spectroscopic Study of Solvent Effects on the Electronic Absorption Spectra of Flavone and 7-Hydroxyflavone in Neat and Binary Solvent Mixtures Matias I. Sancho 1,2, Maria C. Almandoz 1, Sonia E. Blanco 1,2 and Eduardo A. Castro 3,* 1 Physical Chemistry Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, San Luis National University, 5700 San Luis, Argentina; E-Mails: misancho@.ar (M.I.S.); mcalman@.ar (M.C.A.); sblanco@.ar (S.E.B.) 2 Multidisciplinary Institute of Biological Investigations (IMIBIO-SL) CONICET, 5700 San Luis, Argentina 3 INIFTA, Chemistry Department, Faculty of Exact Sciences, La Plata National University, 1900 Buenos Aires, Argentina * Author to whom correspondence should be addressed; E-Mail: eacast@; Tel.: +54-0221-4257430; Fax: +54-021-4254642. Received: 6 September 2011; in revised form: 5 November 2011 / Accepted: 14 November 2011 / Published: 5 December 2011 Abstract: The solvatochromic characteristics of flavone and 7-hydroxyflavone were investigated in neat and binary solvent mixtures. The spectral shifts of these solutes were correlated with the Kamlet and Taft parameters (α, β and π*) using linear solvation energy relationships. The multiparametric analysis indicates that both specific hydrogen bond donor ability and