Spectroscopic investigation of peridinin analogues having different pi-electron conjugated chain lengths: exploring the nature of the intramolecular charge transfer state.

ABSTRACT: The lifetime of the lowest excited singlet (S(1)) state of peridinin and many other carbonyl-containing carotenoids and polyenes has been reported to depend on the polarity of the solvent. This effect has been attributed to the presence of an intramolecular charge transfer (ICT) state in the manifold of excited states for these molecules. The nature of this ICT state has yet to be elucidated. In the present work, steady-state and ultrafast time-resolved optical spectroscopy have been performed on peridinin and three synthetic analogues, C(33)-peridinin, C(35)-peridinin, and C(39)-peridinin, which have different numbers of conjugated carbon-carbon double bonds. Otherwise, the molecules are structurally similar in that they possess the same functional groups. The trends in the positions of t

SUBMITTER: Niedzwiedzki DM 

PROVIDER: S-EPMC2763307 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature