14162-95-9Relevant articles and documents
A high molar extinction coefficient mono-anthracenyl bipyridyl heteroleptic ruthenium(II) complex: Synthesis, photophysical and electrochemical properties
Adeloye, Adewale O.,Ajibade, Peter A.
, p. 4615 - 4631 (2011)
In our quest to develop good materials as photosensitizers for photovoltaic dye-sensitized solar cells (DSSCs), cis-dithiocyanato-4-(2,3-dimethylacrylic acid)-2,2'- bipyridyl-4-(9-anthracenyl-(2,3-dimethylacrylic)-2,2'-bipyridyl ruthenium(II) complex, a high molar extinction coefficient charge transfer sensitizer, was designed, synthesized and characterized by spectroscopy and electrochemical techniques. Earlier studies on heteroleptic ruthenium(II) complex analogues containing functionalized oligo-anthracenyl phenanthroline ligands have been reported and documented. Based on a general linear correlation between increase in the length of p-conjugation bond and the molar extinction coefficients, herein, we report the photophysical and electrochemical properties of a Ru(II) bipyridyl complex analogue with a single functionalized anthracenyl unit. Interestingly, the complex shows better broad and intense metal-to ligand charge transfer (MLCT) band absorption with higher molar extinction coefficient (δmax = 518 nm, σ = 44900 M-1cm-1), and appreciable photoluminescence spanning the visible region than those containing higher anthracenyl units. It was shown that molar absorption coefficient of the complexes may not be solely depended on the extended p-conjugation but are reduced by molecular aggregation in the molecules.
Synthesis and spectral properties of ruthenium(II) complexes based on 2,2′-bipyridines modified by a perylene chromophore
Kodama, Koichi,Kobayashi, Akinori,Hirose, Takuji
, p. 5514 - 5517 (2013)
Five new 2,2′-bipyridines functionalized with a perylene or a perylenediimide moiety were synthesized and the corresponding heteroleptic ruthenium(II) complexes ([Ru(bpy)2(L)](PF6)2; bpy = 2,2′-bipyridyl, L = perylene-substituted bpy ligand) were prepared. The UV-vis spectra of the ruthenium(II) complexes showed red-shifted and intense absorption bands derived from the conjugated structure of the new ligands.
Stereoselective and hierarchical self-assembly from nanotubular homochiral helical coordination polymers to supramolecular gels
He, Yabing,Bian, Zheng,Kang, Chuanqing,Gao, Lianxun
, p. 5695 - 5697 (2010)
A new binaphthylbisbipyridine-based ligand underwent diastereoselective self-assembly with silver(i) ions to form nanotubular homochiral helical coordination polymers, which further hierarchically self-assemble into nanofibers, capable of immobilizing organic solvents.
Click chemistry on a ruthenium polypyridine complex. An efficient and versatile synthetic route for the synthesis of photoactive modular assemblies
Baron, Aurelie,Herrero, Christian,Quaranta, Annamaria,Charlot, Marie-France,Leibl, Winfried,Vauzeilles, Boris,Aukauloo, Ally
, p. 5985 - 5987 (2012)
In this Communication, we present the synthesis and use of [Ru(bpy) 2(bpy-CCH)]2+, a versatile synthon for the construction of more sophisticated dyads by means of click chemistry. The resulting chromophore-acceptor or -donor complexes have been studied by flash photolysis and are shown to undergo efficient electron transfer to/from the chromophore. Additionally, the photophysical and chemical properties of the original chromophore remain intact, making it a very useful component for the preparation of visible-light-active dyads.
Conducting redox polymers: Investigations of polythiophene-Ru(bpy)3(n+) hybrid materials
Zhu, Sherry S.,Kingsborough, Richard P.,Swager, Timothy M.
, p. 2123 - 2131 (1999)
A series of thiophene-appended Ru(II)(bpy)3 derivatives, Ru(1)3, Ru(2)3, Ru(3)3, Ru(bpy)2(1), and Ru(bpy)2(2), and their resulting polymers have been synthesized and characterized. The bpy ligands 5,5'-bis (5-(2,2'-bithienyl))-2,2'-bipyridine, 1, 4,4'-bis (5-(2,2'-bithienyl))-2,2'- bipyridine, 2, and 4-(5-(2,2'-bithienyl))-2,2'-bipyridine, 3, all contain electrochemically polymerizable bithienyl moieties. The monomers Ru (2)3, Ru(3)3, Ru (bpy)2(1) and Ru(bpy)2(2) display spectroscopic features that are similar to the ligand-based and MLCT bands found for Ru(bpy)3. The cyclic voltammograms of all of these polymers display both metal-centered and thiophene-based electroactivity. High redox conductivity was found in poly(Ru(2)3) and poly(Ru(3)3) for both the thiophene-based oxidation and metal-based reduction processes. These results indicate that the polymers display charge localization for both the metal complexes as well as the tetrathienyl connecting units. The degree of interconnection (number of linkages) as well as the substitution pattern were found to control the conductivity of these polymers. The highest conductivity (3.3 x 10-3 S cm- 1) was found for poly(Ru(2)3), which is able to have up to 6 linkages with other ruthenium complexes as well as possessing a 4,4'-substitution pattern that allows effective orbital overlap of the conjugated polymer backbone with the ruthenium centers.
Synthesis, photophysical and electrochemical properties of a mixed bipyridyl-phenanthrolyl ligand Ru(II) heteroleptic complex having trans-2-Methyl-2-butenoic acid functionalities
Adeloye, Adewale O.
, p. 8353 - 8367 (2011)
In this work, two ligands: 4-(trans-2-Methyl-2-butenoic acid)-2,2'-bipyridine) (L1) and 5-(trans-2-methyl-2-butenoic acid)-1,10-phenanthroline (L2), with the corresponding mixed-ligand heteroleptic Ru(II) complex were synthesized and characterized by FT-IR, 1H-, 13C-NMR spectroscopy and elemental analysis. The influence of the mixed functionalized polypyridyl ruthenium(II) complex on the photophysical and electrochemical properties were investigated and compared to individual single-ligand homoleptic complexes. Interestingly, the mixed-ligand complex formulated as [RuL1L2(NCS)2] exhibits broad and intense metal-to-ligand charge transfer (MLCT) absorption with a high molar extinction coefficient (λmax = 514 nm, ε = 69,700 M -1 cm-1), better than those of individual single-ligand complexes, [Ru(L1)2(NCS)2] and [Ru(L2) 2(NCS)2], and a strong photoluminescence intensity ratio in the red region at λem = 686 nm. The electrochemical properties of the complex indicated that the redox processes are ligand-based.
Modular syntheses of star-shaped pyridine, bipyridine, and terpyridine derivatives by employing sonogashira reactions
Trawny, Daniel,Kunz, Valentin,Reissig, Hans-Ulrich
supporting information, p. 6295 - 6302 (2015/03/30)
A simple and flexible synthesis for a series of star-shaped pyridine, bipyridine, and terpyridine derivatives is reported by using a modular approach that combines the use of a ligand, spacer, and core unit. A fairly efficient method to prepare 4′-nonafloxy-functionalized terpyridine derivatives is described. The building blocks that contain the functionalized pyridine, bipyridine, or terpyridine derivatives were linked to different C3-symmetrical core units. In most cases, Sonogashira reactions were employed in the crucial final steps of the synthesis. A star-shaped dodecafluorinated compound was also prepared in a straightforward fashion. A simple procedure for the preparation of partially silylated 1,3,5-triethynylbenzene derivatives is presented, which provides an approach to C2-symmetrical star-shaped compounds that have only one terpyridine and two terphenyl units as "dummy" ligands. The absorption and emission spectra of the fully conjugated C3-symmetrical pyridine derivatives were systematically investigated, and fairly large Stokes shifts were observed.