New luminescent extended linear dimer based on meso-tetrafluorenylporphyrins

A series of porphyrin monomers bearing four n-butyl substituted fluorenyl donor groups is presented; successively, intermediate compounds 1 (TMS protected), 2 (possessing an acetylene group) and corresponding zinc complex 3 have been synthesized. Starting from these building blocks, new extended Dimer, with in totally 9 fluorenyl groups, has been obtained and fully characterized. For the first time two highly luminescent tetrafluorenylporphyrin units (TFP) are connected to form a linear geometry and in addition, a rigid 2,7-fluorenyl linker was selected to connect these building blocks. The luminescence properties were compared with TFP monomer, dimer and trimer described earlier by our group. (C) 2017 Elsevier B.V. All rights reserved.