140613-22-5Relevant academic research and scientific papers
Interfacial electron transfer dynamics of two newly synthesized catecholate bound RuII polypyridyl-based sensitizers on TiO2 nanoparticle surface - A femtosecond pump probe spectroscopic study
Banerjee, Tanmay,Rawalekar, Sachin,Das, Amitava,Ghosh, Hirendra N.
scheme or table, p. 4187 - 4197 (2011/12/05)
Two new catecholate-bound RuII-polypyridine based sensitizers, (2,2′-bipyridine){ethyl 3-(4-hydroxyphenyl)-2-[(4′-methyl-2, 2′-bipyridinyl-4-carbonyl)amino]propionate}{4-[2-(4′-methyl-2, 2′-bipyridinyl-4-yl)vinyl]benzene-1,2-diol)}ruthenium(II) hexafluorophosphate (5) and [(2,2′-bipyridine)-(4-2,2′-bipyridinyl- 4-yl-phenol)-(4-{2-(4′-methyl-2,2′-bipyridinyl-4-yl)vinyl}benzene-1, 2-diol)]ruthenium(II) hexafluorophosphate (6) with secondary electron-donating groups (tyrosine and phenol, respectively) were synthesized and characterized. Steady-state optical absorption and emission studies confirm strong coupling between the sensitizers and TiO2 nanoparticles. Femtosecond visible transient absorption spectroscopy has been employed to study interfacial electron transfer (IET) dynamics in the dye-nanoparticle systems to explore the influence of the secondary electron-donating groups on IET dynamics. Electron injection into the conduction band of nanoparticulate TiO2 has been confirmed by detection of the conduction band electrons in TiO2 ([e-]TiO2CB) and radical cation of the adsorbed dye (D·+) in real time monitored by transient absorption spectroscopy. A single exponential and pulse-width limited (2 and by the recovery of the ground state bleach. BET dynamics in dye-TiO2 systems for complexes 5 and 6 have been compared with those of [bis(2,2′-bpy)-(4-{2-(4′-methyl-2, 2′-bipyridinyl-4-yl)vinyl}benzene-1,2-diol)]ruthenium(II) hexafluorophosphate (7), which does not have a secondary electron-donating group.
Cyclization reactions of 3,4-diazaheptatrienyl metal compounds. Pyridines from an anionic analogue of the Fischer indole synthesis: Experiment and theory
Kleine, Tillmann,Froehlich, Roland,Wibbeling, Birgit,Wuerthwein, Ernst-Ulrich
, p. 4591 - 4599 (2011/07/30)
Unsymmetrical N,N′-bisalkylidene hydrazines 7a,b, 10a-c and 13, which are accessible in good to excellent yields from hydrazones 6, 9, and 12 and commercially available α,β-unsaturated carbonyl compounds, are converted into 3,4-diazaheptatrienyl anions 14
Synthesis of mono-substituted 2,2′-bipyridines
Cordaro, Joseph G.,McCusker, James K.,Bergman, Robert G.
, p. 1496 - 1497 (2007/10/03)
The rapid synthesis of 4-aryl-2,2′-bipyridines is described leading to some previously reported compounds in good yields in addition to some new functionalized bipyridines.
Derivatives of Tris(2,2'-bipyridine)ruthenium(II) with Pendant Pyridyl or Phenol Ligands
Hayes, Martin A.,Meckel, Claudia,Schatz, Erik,Ward, Michael D.
, p. 703 - 708 (2007/10/02)
Reaction of 2,2':4',4''-terpyridine or 4-(4-pyridyl)-2,2':4',4''-terpyridine with (bipy = 2,2'-bipyridine) and of 4-(p-methoxyphenyl)-2,2'-bipyridine with followed by demethylation of the anisole with BBr3, yields derivatives of Ru(bipy)3(2+) which contain externally directed pendant pyridyl or phenol groups capable of ligation to other metals.These complexes are proposed as 'building blocks' for photoactive polynuclear complexes containing the Ru(bipy)3(2+) chromophore.Methylation of the pendant pyridyl rings with methyl iodide generates electron-accepting groups covalently attached to the Ru(bipy)3(2+) core.
