Carborane Bridged Ferrocenyl Conjugated Molecules: Synthesis, Structure, Electrochemistry and Photophysics Properties

The reaction between alkynyl bridged bisferrocenyl derivatives and decaborane affords the new symmetrical ferrocenyl substituted carboranes 8-11. All the new compounds have been identified and fully characterized by means of NMR and HRMS. The molecular structures of target compounds 8-11 were determined by single-crystal X-ray analysis. The electrochemistry studies of the ferrocenyl substituted carboranes are reported, suggesting that the considerable electronic communication between the two ferrocenyl in these symmetrical conjugated oligomers. The thermodynamic stability of the mixed-valent species increases in the order 11 < 8 < 10 < 9.