138715-82-9Relevant academic research and scientific papers
Cyclometalated organoruthenium complexes for application in dye-sensitized solar cells
Wadman, Sipke H.,Kroon, Jan M.,Bakker, Klaas,Havenith, Remco W. A.,Van Klink, Gerard P. M.,Van Koten, Gerard
, p. 1569 - 1579 (2010)
To investigate the viability of cyclometalation as a general tool in the design of new sensitizers for dye-sensitized solar cells, a series of (cyclometalated) ruthenium complexes was prepared. To this purpose we have prepared the carboxylate-functionalized 2,2′:6′,2′′- terpyridine (tpy)-based tridentate ligands 4′-ethoxycarbonyl-2,2′: 6′,2′′-terpyridine (EtO2C-N∧N ∧N, 5), methyl-3,5-di(2-pyridyl)benzoate (MeO2C-N ∧C(H)∧N, 6), 4-ethoxycarbonyl-6-phenyl-2,2′- bipyridine (EtO2C-C(H)∧N∧N, 7), and 4,4′-bis(methoxycarbonyl)-6-phenyl-2,2′-bipyridine ((EtO 2C)2-C(H)∧N∧N, 8), and the ruthenium complexes thereof, [Ru(EtO2C-tpy)(tpy)](PF 6)2, 1a, [Ru(MeO2C-N∧C ∧N)(tpy)](PF6), 2a, [Ru(EtO2C-C ∧N∧N)(tpy)](PF6), 3a, and [Ru((MeO 2C)2-C∧N∧N)(tpy)](PF 6)2, 4a. In this series, cyclometalation results in a red shift as well as in a broadening of the electronic absorption features and is accompanied by a cathodic shift in the RuII/RuIII redox process. The complexes are photostable in both the Ru(II) and the Ru(III) state. Deprotection of the esters and grafting onto TiO2 resulted in a small additional red shift of the absorption features. Incorporation of the free acids of the complexes into a standardized solar cell shows efficient sensitization for the complexes 3b and 4b, with the C,N,N′-bonding motif. The dicarboxylated complex 4b showed short circuit currents similar to those obtained for the benchmark compound N719. In contrast, for the free acid of 1a, with the N,N′,N′′-bonding motif, and for 2a, with the N,C,N′-bonding motif, low efficiencies were observed. To put these results into perspective, we have applied TD-DFT calculations. The optical assignments based on these calculations correlated well with the spectral changes observed during pKa determinations. The complexes with the C,N,N′-bonding motif possess an excited state associated with the cyclometalated ligand, allowing efficient charge injection, while the complex with the N,C,N′-bonding motif possesses a more isolated excited state located on the remote tpy ligand and, as a result, is not capable of efficient charge injection into the TiO2 conduction band. This shows that the covalent carbon-to-ruthenium bond can be utilized as a tool to shift the operational threshold of the individual sensitizer for dye-sensitized solar cells toward lower energy, as long as care is taken that the nature of the excited state is appropriate for electron injection.
Synthesis of novel ruthenium dyes with thiophene or thienothiophene substituted terpyridyl ligands and their characterization
Ahn, Jaeun,Lee, Ki Chang,Kim, Dajung,Lee, Chongchan,Lee, Sunae,Cho, Dae Won,Kyung, Sukhun,Im, Chan
, p. 45 - 51 (2013)
We synthesized new materials for dye-sensitized solar cell (DSSC) which is incorporating highly conjugated π-electron-donating groups, such as thiophene or thieno[3,2-b]thiophene. The synthesized dyes showed similar molar extinction coefficient compared t
An Isoreticular Series of Zinc(II) Metal-Organic Frameworks Derived from Terpyridylcarboxylate Ligands
Young, David C.,Yang, Hui,Telfer, Shane G.,Kruger, Paul E.
, p. 12224 - 12231 (2017)
An isoreticular family of seven microporous metal-organic frameworks of the general form [ZnL] have been synthesized, where L is a 4′-substituted 2,2′:6′,2″-terpyridine-4,4″-dicarboxylate ligand. Each framework adopts an interpenetrated zeolitic gismondine (gis-c) topology and possesses one-dimensional square channels with ca. 9.0 ? apertures running down the crystallographic c axis. Gas adsorption measurements with N2, H2, CH4, and CO2 confirm their permanent porosity. The ligand functional groups, which include phenyl, 2-tolyl, 4-chlorophenyl, 4-nitrophenyl, 2-thienyl, 3-thienyl, and 4-pyridyl, line the channel walls and tune the gas adsorption properties of these materials.
OXIME DERIVATIVES USEFUL AS INHIBITORS OF HISTONE DEMETHYLASE KDM4C
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Page/Page column 39, (2017/12/16)
The present invention relates to oxime derivatives (Formula I), wherein R1 and R2 are as defined in the specification, pharmaceutical compositions containing such compounds and to their use in therapy.
N1-PYRAZOLOSPIROKETONE ACETYL-COA CARBOXYLASE INHIBITORS
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Page/Page column 18, (2011/05/16)
The invention provides a compound of Formula (I) or a pharmaceutically acceptable salt of the compound, wherein R1, R2, R3 and R4 are as described herein; pharmaceutical compositions there-of; and the use thereof in treating diseases, conditions or disorders modulated by the inhibition of an acetyl- CoA carboxylase enzyme(s) in an animal
N2-PYRAZOLOSPIROKETONE ACETYL-COA CARBOXYLASE INHIBITORS
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Page/Page column 37; 38, (2011/06/16)
The invention provides a compound of Formula (I) or a pharmaceutically acceptable salt of said compound, wherein R1, R2, R3 and R4 are as described herein; pharmaceutical compositions thereof; and the use thereof in treating diseases, conditions or disorders modulated by the inhibition of an acetyl- CoA carboxylase enzyme(s) in an animal.
