A New N-functionalized Pyrrole Derivative Bearing Ruthenium Tris(2,2'-bipyridine) Subunit

In recent years, nitrogen-based ruthenium complexes have become an important material for dye-sensitized solar cells and photo-catalytic H2O and CO2 reduction research and applications, thanks to their charge transfer feature from the metal to the ligand. The electronic and spectral properties of such materials can be easily modified by changing the substituents and ligands. In this study, a new ruthenium (II) complex with N-functionalized pyrrole derivative ([Ru(bpy)(2)(bpyCONHArPy)](+2) complex) was successfully synthesized and characterized. Its optical and electrochemical properties were studied by means of fluorescence, UV-vis spectrometry, FTIR spectroscopy and cyclic voltammetry. These results were compared with that of its components (4-(1H-pyrrol-1-yl) aniline, N-4,N-4 '-bis(4-(1H-pyrrol-1-yl)phenyl)-[2,2 '-bipyridine]-4,4 '-dicarboxamide and ligand [Ru(bpy)(3)](+2)). Related theoretical studies were also studied to find energy levels of complex. The present work is carried out to understand what chemical changes bring when combination of all the pieces of the puzzle into a chemical structure step by step.