Beam deviation of large polar molecules in static electric fields: theory and experiment

A classical approach to calculate the energy and the orientation of symmetr ic top and linear molecules in high electric fields is proposed. This calcu lation is particularly well adapted to large molecules. It is used to simul ate the deviation of a molecular beam in an inhomogeneous electric field. W e give an example of experimental and calculated profiles of deviation for a transition metal-fullerene compound TiC60. This is the first direct measu rement of the permanent dipole of a large rigid molecule in the gas phase. (C) 2001 Elsevier Science B.V. All rights reserved.