CALCULATION OF THE INTERACTION POTENTIAL FOR BICHROMOPHORIC HETERO-MOLECULAR CLUSTERS

An expression for the interaction potential between two anisotropic mo lecules is derived. This expression is suitable for describing the van der Waals interaction between two chromophores within a bichromophori c molecular cluster. For the anthracene-naphthalene and for the benzen e-biacetyl clusters the calculation predicts the existence of two isom ers, in agreement with experimental observations. The model is also su ccessfully applied to other clusters yielding better results than thos e obtained by alternative methods which do not take into account the a nisotropy of molecular polarizability.