1.
Spectrochim Acta A Mol Biomol Spectrosc
; 60(8-9): 1805-10, 2004 Jul.
Artigo
em Inglês
| MEDLINE
| ID: mdl-15248953
RESUMO
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.