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Research on Chemical Intermediates

, Volume 31, Issue 7–8, pp 649–659 | Cite as

Excitation energy transfer efficiency of dipole–dipole interaction in a dye pair in polymer medium

  • Umakanta Tripathy
  • Prem B Bisht
  • Krishna K Pandey
Article

Excitation energy transfer efficiency (η) of dipole–dipole interaction has been studied in the dye pair 3,3′-dimethyloxacarbocyanine iodide (DMOCI) (donor) to o-(6-diethylamino-3diethylimino-3H-xanthen-9-yl) benzoic acid (Rhodamine B, RB) (acceptor) in polyvinyl alcohol (PVA) thin films by steady-state and ps time-resolved fluorescence spectroscopy. In the presence of the acceptor the fluorescence intensity of the donor decreases, while that of the acceptor increases as a function of the added acceptor concentration. Time-resolved study of the donor at various acceptor concentrations suggest that the non-radiative energy transfer mechanism as proposed by Förster is responsible for the observed behaviour along with some modifications at very low acceptor concentrations. Modified η values have been simulated and compared with those obtained experimentally. It is found that the value of η increases with acceptor concentration.

ENERGY TRANSFER EFFICIENCY TIME-CORRELATED SINGLE PHOTON COUNTING 3,3PRIME-DIMETHYLOXACARBOCYANINE IODIDE RHODAMINE B 

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© VSP 2005

Authors and Affiliations

  • Umakanta Tripathy
  • Prem B Bisht
  • Krishna K Pandey

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