Determination of interfacial dielectric constant of AOT-based reverse micelle by probing magnetic field effect on pyrene-DMA exciplex luminescence

The effect of magnetic field on the luminescence of pyrene-DMA exciplex confined within the reverse micellar (RM) environment of various cavity sizes is reported. The field-modulated change in luminescence Δφ/φ) at various w values is strikingly similar to the Δφ/φ vs dielectric constant (ε) variation of solvent mixtures which suggests that e of the RM interface is primarily responsible for the variation of magnetic field effect (MFE). The interfacial dielectric constant at different w values may be evaluated on the basis of the above similarity