Energy transfer between dye molecules investigated by steady state and time resolved spectroscopy
The kinetics of long range resonant energy transfer between photoexcited dye molecules (the donor) and unexcited dye molecules (the acceptor) has been studied with the goal to understand the fundamental processes behind long range resonant energy transfer, to search for the possible mechanisms during the energy transfer, and to find out the factors which parameters affect the energy transfer between the donor and acceptor molecules. A theoretical model based on the dipole-dipole interaction was established to explain the dynamics of energy transfer between the donor and acceptor dye molecules and fit the kinetic fluorescence profiles of donor and acceptor emission. The measurements by the techniques of steady state and time-resolved fluorescence spectroscopy were performed for the binary mixtures (A) Rhodamine 6G (the donor) and Oxazine 4 Perchlorate (the acceptor), and (B) Rhodamine B (the donor) and Nile Blue A Perchlorate (the acceptor). It is found that: 1 not only was the donor decay time short but also the acceptor risetime slowed in the mixed solution; 2 the relative decrease of donor quantum yield followed the increase of quantum yield of acceptor when the energy transfer is operative; 3 the decrease of donor decay time followed the increase of the risetime of the acceptor as the concentration of acceptor increased for a given concentration of donor at room temperature; and 4 the long range energy transfer rate increases as the concentration of acceptor and the energy deactivation efficiency increases as the diffusion coefficient increases.
- OSTI ID:
- 5035113
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DYE LASERS
LASER MATERIALS
ENERGY TRANSFER
BINARY MIXTURES
DECAY
EFFICIENCY
EXPERIMENTAL DATA
FLUORESCENCE
OPTICAL PUMPING
PERCHLORATES
RHODAMINES
AMINES
CARBOXYLIC ACIDS
CHLORINE COMPOUNDS
DATA
DISPERSIONS
DYES
HALOGEN COMPOUNDS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
LASERS
LIQUID LASERS
LUMINESCENCE
MATERIALS
MIXTURES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PUMPING
REAGENTS
420300* - Engineering- Lasers- (-1989)