17666-89-6Relevant academic research and scientific papers
Preparation and catalytic application of Pd loaded titanate nanotube: Highly selective α alkylation of ketones with alcohols
Jang, Jum Suk,Kwon, Min Serk,Kim, Hyun Gyu,Park, Jae Wook,Lee, Jae Sung
experimental part, p. 1617 - 1621 (2012/07/14)
The titanate nanotube (TNT) was hydrothermally synthesized in 10 M NaOH aqueous solution at 150 °C for 72 h. Titanate nanotube with high surface area (292 m2/g) is a good candidate as a support for catalytic reaction or organic synthesis. Palladium nanoparticles with an average size of ca. 3 nm were well dispersed onto the surface of TNT nanotubes. Palladium loaded catalyst with high surface area shows a highly efficient a alkylation of ketones with primary alcohols.
Matched spin probes for the study of the overall motion of model lubricants
Britton,Fawthrop,Gillies,Sutcliffe,Wu,Smirnov
, p. 493 - 501 (2007/10/03)
For ESR studies of molecular rotation in liquids, it is desirable to match the spin probe as closely as possible to the solvent molecules. In this work the solvents were model lubricants whose overall motion has been characterized from carbon-13 NMR relaxation measurements. Two compounds were studied, the approximately cylindrical molecule 5-(n-octyl)naphthalene (ON) (a model low-traction fluid) and the approximately spherical molecule dicyclohexy-3,4-furan dicarboxylate (DCFDC) (a model high-traction fluid). For these two compounds the matched spin probes 5-(n-octyl)-1,1,13,3-tetrakis(trideuteriomethyl)isoindolin-2-yloxyl (OTMIOD) and 4,5-bis(cyclohexyloxycarbonyl)-1,3,2-dithiazol-2-yl (BCCD), respectively, were prepared. ESR measurements were made on OTMIOD in ON and in toluene at two frequencies, namely 9 GHz (X band) and 94 GHz (W band), and the importance of making the high-frequency measurements was demonstrated for evaluation of the anisotropy parameters. The results are different for the two solvents, thus proving the necessity for matching the spin probe to the solvent. BCCD was shown to be tumbling isotropically in DCFDC. Activation energies were derived for the overall motions from the ESR and NMR measurements. These activation energies were compared with those for the viscosities of the solvents. The viscosities of both ON and DCFDC were measured over a wide temperature range using an ESR method.
