338-70-5Relevant articles and documents
Electrochemical Reduction of Carbon Dioxide Using Iron-Sulfur Clusters as Catalyst Precursors
Nakazawa, Makoto,Mizobe, Yasushi,Matsumoto, Yoichi,Uchida, Yasuzo,Tezuka, Meguru,Hidai, Masanobu
, p. 809 - 814 (1986)
The potential-current relationships of DMF solutions of a series of iron-sulfur compounds have revealed that in the presence of clusters 2- (R=PhCH2 or But) and 3- (M=Mo or W) the electroreduction of CO2 proceeds at the potential shifted by about 0.7 and 0.5 V, respectively, to the positive direction compared to the potential at which CO2 is reduced without any catalyst.When controlled potential electrolysis of a DMF solution containing 2- was carried out under CO2 at -2.0 V vs.SCE, phenylacetate and formate were formed as the products resulting from CO2 reduction.The cubane structure of this cluster collapsed rapidly under these conditions.However, when excess amount of PhCH2SH was added to the catholyte, the cluster structure was preserved during a relatively long period of electrolysis, and the yield of phenylacetate increased but that of formate decreased compared with the reaction in the absence of free PhCH2SH.
Polymerization-induced enhancement of binding and binding-induced polymerization
Ortiz,Guichou,Chavanieu,Sánchez,Prado-Gotor
, p. 266 - 270 (2008/10/09)
We obtained the binding free energy of the complex [Co(C2O 4)3]3- to the peptide H-Lys-Gly-(Lys-Gly) 9-Lys-NH2, and to the monomers (aminoacids) forming the peptide, using the electron transfer reaction between [Ru(NH3) 5pz]2+ and [Co(C2O4) 3]3- as the probe. The polymerization of the monomers increases the negative free energy of binding and changes its character, non-cooperative for the monomers and anti-cooperative for the peptide. This increase in the negative free energy represents a driving force for the polymerization process that produces the peptide from the aminoacids (monomers) in such a way that the polymerization in the presence of the cobalt complex is more favourable, from a thermodynamic point of view, in 16.5 kJ/mol.
Ultrasonic Irradiation of p-Nitrophenol in Aqueous Solution
Kotronarou, A.,Mills, G.,Hoffmann, M. R.
, p. 3630 - 3638 (2007/10/02)
The kinetics and mechanism of the sonochemical reactions of p-nitrophenol have been investigated in oxygenated aqueous solutions.In the presence of ultrasound (20 kHz, 84 W) p-nitrophenol was degraded primarily by denitration to yield NO2-, NO3-, benzoquinone, hydroquinone, 4-nitrocatechol, formate, and oxalate.These reaction products and the kinetic observations are consistent with a model involving high-temperature reactions of p-nitrophenol in the interfacial region of cavitation bubbles.The main reaction pathway appears to be carbon-nitrogen bond cleavage.Reaction with hydroxyl radicals provides a secondary reaction channel.The average effective temperature of the interfacial region surrounding the cavitation bubbles was estimated to be T ca. 800 K.
