Synthesis and spectroscopic properties of a new bipyridine-bipyrazoyl(pyridine)-thiocyanato-ruthenium(II) complex

Synthesis, Characterization, and Sensitizing Properties of Heteroleptic RuII Complexes Based on 2,6‐Bis(1‐pyrazolyl)pyr­idine and 2,2′‐Bipyridine‐4,4′‐dicarboxylic Acid Ligands

“…However, dye 2b is almost 40 % less efficient than the N719 ‐sensitized solar cell. As expected, the photovoltaic performance of the Ru–NCS dye 3 was higher than that of the Ru–Cl precursor 2a , and this can be attributed to a better tuning and stabilization of the t 2g orbitals of the thiocyanate complex 13a. We are currently examining the photovoltaic characteristics of all the above dyes in semi‐solid propylene carbonate‐based modified nanocomposite redox electrolytes prepared in our group.…”

“…Both complexes exhibited a broad and medium intensity absorption band at 1718 and 1717 cm –1 respectively which is assigned to the ν(C=O) stretching vibration. This band has a slightly higher frequency than that of [Ru(bdmpp)(dcbpyH 2 )Cl](PF 6 ) (1715 cm –1 )13b and [Ru(bdmpp)(dcbpyH 2 )(NCS)](PF 6 ) (1713 cm –1 ) respectively13a which may be attributed to the higher electron density at the Ru II center of complexes bearing the methyl‐substituted pyrazolyl‐pyridine ligand bdmpp. The bands at 1628 and 1627 cm –1 respectively, overlapping with the bpy bands3c,19 at 1609 and 1610 cm –1 , are tentatively assigned to the antisymmetric carboxylate vibration ν as (CO 2 – ) 22.…”

Solid-state sensitized solar cells, using [Ru(dcbpyH2)2Cl2]·2H2O as the dye and PEO/titania/I−/I3− as the redox electrolyte

“…However, we proceeded in the synthesis of the above complex in order to achieve later a coordination of the Ru(II) metal with better chromophore groups and thus to obtain better photovoltaic properties. That is, the total electrical output of the cell doubles, when the complex [Ru(II)(dcbpyH 2 )(bdmpp)Cl] + (PF 6 ) − [28] was used, and becomes about five times higher for a solar cell using a similar dye, where the Cl moiety has been replaced by the monodentate thiocyanato ligand [29]. Even more spectacular are the results (15 times improvement) when comparing with the N3 dye that showed an unmatched photovoltaic performance so far [30].…”

Synthesis, characterization and crystal structure of a novel thiocyanate–ruthenium(II) complex

“…One reason for the still increasing interest in this class of compounds is their potential applications as catalysts [4] and photochemical molecular devices [5,6]. In this context, the cis and trans-[RuCl 2 (dppb)(bipy)] complexes are active in the epoxidation of olefins and the cis-[Ru(bipy) 2 (NCS) 2 ] ruthenium-polipyridyl complex has been identified as a particularly efficient photosensitizer because of its broad range of visible light absorption.…”

“…Enormous progress has been made in the field of ruthenium complex chemistry with phosphines and bipyridines [1][2][3][4][5][6]. One reason for the still increasing interest in this class of compounds is their potential applications as catalysts [4] and photochemical molecular devices [5,6].…”