Synthesis of heteroleptic Ru(II) complexes ligated with 1,3-dihydro-1,1,3,3-tetramethyl-7,8-diazacyclopenta[1]phenanthren-2-one and application in dye-sensitized solar cells

Synthesis and Characterization of Heteroleptic Ru(II) Complexes Based on 4,4′‐Bis((E)‐styryl)‐2,2′‐bipyridine as Ancillary Ligand and Application for Dye‐Sensitized Solar Cells

“…The synthesis of anchoring ligands 4,4′‐dicarboxy‐2,2′‐bipyridine (dcbpy), 4,4′‐bis(( E )‐carboxyvinyl)‐2,2′‐bipyridine (dcvbpy), 4,7‐dicarboxy‐1,10‐phenanthroline (dcphen), and 4,7‐bis(( E )‐carboxyvinyl)‐1,10‐phenanthroline (dcvphen) was recently reported ( Scheme ,b ). [ ][ ]…”

“…The solvents were dried using the standard method. 4,4′‐bis(( E )‐styryl)‐2,2′‐bipyridine (bsbpy), 4,4′‐dicarboxy‐2,2′‐bipyridine (dcbpy), 4,4′‐bis‐(( E )‐carboxyvinyl)‐2,2′‐bipyridine (dcvbpy), 4,7‐dicarboxy‐1,10‐phenanthroline (dcphen), and 4,7‐bis(( E )‐carboxyvinyl)‐1,10‐phenanthroline (dcvphen) were prepared according to the literature …”

“…We recently reported on two series of new heteroleptic ruthenium(II)complexes, i.e ., Ru[(L)(L’)(NCS) 2 ], HJ1 – HJ4 [Ru(L)(DTDP)(NCS) 2 ][TBA] and RS1 – RS6 [Ru(L)(dcvphen)(NCS) 2 ][TBA] x ( x = 1 – 2), (where DTDP = 1,3‐dihydro‐1,1,3,3‐tetramethyl‐7,8‐diazacyclopenta[1]phenanthren‐2‐one, dcvphen = 4,7‐bis(( E )‐carboxyvinyl)‐1,10‐phenanthroline, L = a functionalized bipyridine and phenanthroline). [ ][ ] We have engaged in ligand design with the aim to improve the photocurrent as a red‐shift of the metal‐to‐ligand charge transfer (MLCT), which is an extension of the π ‐conjugation of the ancillary ligand and/or the anchoring ligand. The power conversion efficiency ( η ) of HJ1 was 2.83%, which was comparable to that of N719 .…”

“…[ ][ ] We have engaged in ligand design with the aim to improve the photocurrent as a red‐shift of the metal‐to‐ligand charge transfer (MLCT), which is an extension of the π ‐conjugation of the ancillary ligand and/or the anchoring ligand. The power conversion efficiency ( η ) of HJ1 was 2.83%, which was comparable to that of N719 . In addition, heteroleptic dinuclear ruthenium(II) complexes bridged with 5‐(2‐[2,2′‐bipyridin]‐5‐ylethynyl)‐2,2′‐bipyridine ligand and ligated to ancillary α ‐diimine ligand was studied recently as an extension of the series …”

Synthesis and Study of the Physical and Photovoltaic Properties of Novel Heteroleptic Ruthenium(II) Complexes Ligated with Highly π-Conjugated Bipyridine Ancillary and Phenanthroline Anchoring Ligand for Dye-Sensitized Solar Cells

“…Consequently, a series of novel heteroleptic ruthenium(II) complexes and dinuclear ruthenium(II) complexes that exhibited satisfactory PCE were synthesized. A series of compounds were synthesized by varying the ancillary and/or anchoring ligands [15][16][17][18][19]. During the course of our study, we realized that anchoring ligands other than the bcbpy-or terpyridinetype ligands could be used for the fabrication of efficient DSSCs.…”