Fluorescence spectroscopy of uniaxially organized molecular media. State-dependent fluorophore-matrix aligning interactions

A description of time-resolved polarized fluorescence spectroscopy on the fluorophores incorporated into uniaxially organized molecular media and undergoing different ground- and excited-state aligning interactions, is discussed. The excited-state aligning-potential-restricted rotational diffusion model is considered. From the solution of the motion equation the time-evolution of even and odd higher-rank molecular order parameters can be recovered. This enables more precise reconstruction of the angular distribution of fluorophores aligned in electric field, adsorbed at the solid(liquid)/air surfaces and at the solid(liquid)/liquid interfaces and also aligned in membranes, liquid crystals and Langmuir–Blodgett films.