Fig. 4: Chirgwin–Coulson structure weights of locally excited and charge transfer (CT) configurations.

Shown in the top panel are the two lowest singlet valence excited states and the bottom figures exhibit two charge transfer states as a function of inter-fragment distance (Å) between tetrafluoroethene (1) and ethene (2). The M06-2X density functional and cc-pVTZ basis set are used in MSDFT calculations, including four configuration state functions.