Proceedings 2019, 41, 25; doi:10.3390/ecsoc-23-06490 www.mdpi.com/journal/proceedings Extended Abstract BODIPY (meso-phenyl-meso) Dimer as Photovoltaic Material † Leonardo F. K. Santos, António Aguiar and Abílio J. F. N. Sobral * The Chemistry Department, Faculty of Sciences and Technology, University of Coimbra, 3004-531 Coimbra, Portugal; leokleman@gmail.com (L.F.K.S.); antonioluis_aguiar@hotmail.com (A.A.) * Correspondence: asobral@ci.uc.pt † Presented at the 23rd International Electronic Conference on Synthetic Organic Chemistry, 15 November–15 December 2019; Available Online: https://sciforum.net/conference/ecsoc-23. Published: 14 November 2019 Keywords: BODIPY; synthesis; organic chemistry Derivatives of boron-dipyrromethene (BODIPY) constitute an important class of chromophores. The BODIPY dyes can be applied in an extensive variety of applications, such as cellular imaging, photodynamic therapy, drug-delivery or organic photovoltaics [1–4]. BODIPYs are also excellent compounds to be applied as electron-donor materials in organic photovoltaic cells as they have a strong absorption in the visible spectra region, a photochemical and chemical stability, good solubility and a general suitable HOMO/LUMO frontier orbital energy levels (Figure 1). Following our work on the use of BODIPYs as photovoltaic materials [5], in this communication we present the synthesis and characterization of a meso-meso BODIPY dimer. This BODIPY dimer has all the main properties to work efficiently as electron-donor material since it exhibits strong absorbance in the visible spectrum, good solubility and suitable HOMO and LUMO energy orbitals to work as donor material in the bulky heterojunction BODIPY/PCBM layer, based solar cells. LUMO HOMO Figure 1. Boron-dipyrromethene (BODIPY) (meso-phenyl-meso) dimer and its frontier molecular orbitals. Acknowledgements: The authors thank the ChemMat PhD program from the Fundação para a Ciência e Tecnologia (FCT, MEC, Portugal) for their general financial support (PD/BD/113702/2015) and to Centro de Química (UID/QUI/00313/2013) of University of Coimbra.