Complete carbon, fluorine and proton NMR assignments have been established, and through space interactions observed for 1o (Figure ) support this - interaction between the pyrene as well as TD-DFT calculations (vide infra). For 1o, 1 H- F-correlation experiments gave clear signals of through space interactions between protons located on the thiophenes and fluorine of the bridge (Figure ). The protons of methyl groups at the 4-or 2-position of the thiophene ring (4Me or 2Me) show through space interaction with the fluorine 7a (F7a) or 7b (F7b) respectively, thus indicating a blocked configuration of the thiophene group around the C6-C3 bound. The proton H4' of the second thiophene group shows through space correlations with both F9a (weak)