Dynamic light scattering from macromolecules with applications to polydisperse systems, part 1. Fluorescence correlation spectroscopy as a probe of molecular dynamics, part 2
Abstract
The autocorrelation function of the scattered electric field was calculated for a variety of systems. A quantum mechanical derivation of the scattering amplitudes, which generalized the wellknown KramersHeisenberg formula to an assembly of weakly interacting charges, is presented. The assumptions and approximations required to obtain the standard correlation function from this scattering amplitude in terms of molecular polarizabilities are examined in detail. A theory relating rotational Brownian motion to the time autocorrelation function of the intensity of radiation from a fluorescent system composed of spherical rotors is presented. The calculation shows three relaxation times, two associated with the natural decay of the fluorescence. The correlation function contains terms that relax independently of the fluorescence decay time, thus arbitrarily extending the time range over which rotational diffusion can be studied by fluorescence.
 Publication:

Ph.D. Thesis
 Pub Date:
 1976
 Bibcode:
 1976PhDT........16A
 Keywords:

 Dynamic Structural Analysis;
 Fluorescence;
 Light Scattering;
 Molecules;
 Brownian Movements;
 Electric Fields;
 Heisenberg Theory;
 Quantum Mechanics;
 Atomic and Molecular Physics