6533b861fe1ef96bd12c4355
RESEARCH PRODUCT
Energy transfer to xanthene dyes in dansylated POPAM dendrimers
Jukka AumanenJouko Korppi-tommolasubject
XantheneEosinRelaxation (NMR)General Physics and AstronomyPhotochemistrychemistry.chemical_compoundchemistryDendrimerUltrafast laser spectroscopyRose bengalPhysical and Theoretical ChemistrySpectroscopyta116Excitationdescription
Abstract Excitation energy transfer (EET) in host–guest complexes of dansylated POPAM dendrimers and xanthene dyes have been studied by transient absorption spectroscopy. EET from dansyl periphery to guests: rose bengal, eosin, or fluorescein, showed non-exponential behaviour as a result of distribution of donor–acceptor distances. Time constants range from 100 fs to 8 ps, independent of the dye and the dendrimer generation. Experiments suggested that in dendrimers binding more than one guest, EET among the guests becomes effective. Guest–host and guest–guest interactions induce non-radiative relaxation channels making excitation decays of the guests clearly faster in complexes than in solution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-12-01 | Chemical Physics Letters |