Abstract
An extended formulation of the circular dichroism of helical chromophore aggregates is given by means of the self-consistent non-linear response theory. In this formulation the helix circular dichroism is expressed in closed form in terms of the chromophore's polarizability and hyperpolarizability and in terms of the retarded helical-lattice sum of interchromophoric dipole-dipole interactions. The effects of interchromophoric dynamic interactions upon the helix circular dichroism are then absorbed self-consistently into the polarizability and hyperpolarizability band shape matrices of the perturbed chromophore. The utility of this formulation is shown by a sample calculation of the polarizability and first-hyperpolarizability contribution effects upon the circular dichroism band shape of an oriented helix modelling the B-form conformation of polynucleotides.
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