Solvatochromic correlations and ground- and excited-state dipole moments of curcuminoid dyes.
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.
Párkányi
Cyril
C
Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Road, P.O. Box 3091, Boca Raton, FL 33431-0991, USA. parkanyi@fau.edu
Stem-Beren
Michelle R
MR
Martínez
Omar R
OR
Aaron
Jean-Jacques
JJ
Bulaceanu-MacNair
Mihaela
M
Arrieta
Antonio F
AF
D004396:Coloring Agents / Q000737:chemistry*; D003474:Curcumin / Q000737:chemistry*; D004563:Electrochemistry; D012997:Solvents; D013053:Spectrophotometry
D004396:Coloring Agents; D012997:Solvents; D003474:Curcumin