Title of article :
Excited states and electrochromism of radical cation of the carotenoid astaxanthin
Author/Authors :
Krawczyk، نويسنده , , Stanis?aw، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1998
Abstract :
Radical cations of the carotenoid astaxanthin were generated by chemical oxidation with Fe(Cl)3, and their absorption and electroabsorption (Stark) spectra at temperatures about 150 K were recorded in the spectral range from 5900 to 26000 cm−1 (380 to 1700 nm), covering two absorptive electronic transitions from D0 (ground) to D1 and D2 excited states. The changes in static polarizability are negative and equal −40±10 A3 for D0→D1 and −105±15 A3 for D0→D2, pointing that dominant contribution to polarizabilities results from the coupling of D1 and D2 with the ground state. An approximate localization of the next excited state with ground-state parity is estimated based on arguments from perturbation theory.
Journal title :
Chemical Physics Letters
Journal title :
Chemical Physics Letters