title: Meso-substituted porphyrin derivatives via palladium-catalyzed amination showing wide range visible absorption: synthesis and photophysical studies.
abstract: In recent years, there has been a growing interest in the design and synthesis of chromophores, which absorb in a wide region of the visible spectrum, as these constitute promising candidates for use as sensitizers in various solar energy conversion schemes. In this work, a palladium-catalyzed coupling reaction was employed in the synthesis of molecular triads in which two porphyrin or boron dipyrrin (BDP) chromophores are linked to the meso positions of a central Zn porphyrin (PZn) ring via an amino group. In the resulting conjugates, which strongly absorb over most of the visible region, the electronic properties of the constituent chromophores are largely retained while detailed emission experiments reveal the energy transfer pathways that occur in each triad.
authors.affiliation: University of Crete, Department of Chemistry, Laboratory of Bioinorganic Chemistry, PO Box 2208, Voutes Campus, 71003, Heraklion, Greece.
authors.forename: Kalliopi
authors.initials: K
authors.lastname: Ladomenou
authors.forename: Theodore
authors.initials: T
authors.lastname: Lazarides
authors.forename: Manas K
authors.initials: MK
authors.lastname: Panda
authors.forename: Georgios
authors.initials: G
authors.lastname: Charalambidis
authors.forename: Dimitra
authors.initials: D
authors.lastname: Daphnomili
authors.forename: Athanassios G
authors.initials: AG
authors.lastname: Coutsolelos
mesh_terms: D000042:Absorption; D000586:Amination; D002384:Catalysis; D060326:Chemistry Techniques, Synthetic; D003116:Color; D004563:Electrochemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D010165:Palladium / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*
chemical_list: D011166:Porphyrins; D010165:Palladium