Synthesis of porphyrin dendrimers via Heck reaction and their photovoltaic properties

Porphyrins meso-substituted with p-phenylene vinylene (OPV) were synthesized. The porphyrin dendrimers obtained showed a strong dependence on the type of connection of the dendritic branches. In the instance of the all trans-conformation linkages, an H-type aggregate is obtained for the linear OPV and strongJ-aggregate for the ramified OPV. An adequate intramolecular energy transference stemming from the OPVs (donors) to the respective cores was observed. Furthermore, the number oligo(p-phenylene vinylene) (OPV) groups linked to the porphyrin system increase the energy transfer efficiency. This behavior also was observed in the photovoltaic studies. (C) 2017 Elsevier B.V. All rights reserved.