title: Solvatochromic correlations and ground- and excited-state dipole moments of curcuminoid dyes.
abstract: Experimental dipole moments of curcumin (1) and of its parent compound dicinnamoylmethane (2) were determined in dioxane and benzene, respectively. Theoretical dipole moments were calculated using a combination of the PPP method (pi-moment) and a vector sum of the sigma-bond moments (sigma-moment) as well as by the ZINDO/1 method. Solvatochromic correlations were used to obtain the experimental first excited singlet-state dipole moments. The experimental electronic absorption spectra were compared with the calculated transitions.
authors.affiliation: Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Road, P.O. Box 3091, Boca Raton, FL 33431-0991, USA. parkanyi@fau.edu
authors.forename: Cyril
authors.initials: C
authors.lastname: Párkányi
authors.forename: Michelle R
authors.initials: MR
authors.lastname: Stem-Beren
authors.forename: Omar R
authors.initials: OR
authors.lastname: Martínez
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Aaron
authors.forename: Mihaela
authors.initials: M
authors.lastname: Bulaceanu-MacNair
authors.forename: Antonio F
authors.initials: AF
authors.lastname: Arrieta
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D003474:Curcumin / Q000737:chemistry*; D004563:Electrochemistry; D012997:Solvents; D013053:Spectrophotometry
chemical_list: D004396:Coloring Agents; D012997:Solvents; D003474:Curcumin