Solvent polarity effects on the conformational equilibrium of N-1-naphthylamides
作者:Jaan Leis、Karel D. Klika、Mati Karelson
DOI:10.1016/s0040-4020(98)00379-2
日期:1998.6
N-alkyl-N-1-naphthylformamides has been measured in a series of solvents using NMR spectroscopy. A linear relationship was found between the free energy of the conformationalequilibrium, ΔG0, and the relative dielectric permittivity of the solvent. The comparison of NMR data with quantum-chemically calculated SCRF heats of equilibria reveals that the solvent effect is a combination of both the electrostatic and
Mesure des barrieres d'interconversion entre les deux conformeres enantiomeres de torsion par spectrometre RMN 1 H et 13 C. On montre que les substituants electrodonneurs et electroattracteurs en position 4 augmentent et diminuent respectivement la barriere d'interconversion des napthyl-1 amines tertiaires
Mesure des barrieres d'interconversion entre les deux Conformeres enantiomeres de torsion par spectrometer RMN 1 H et 13 C. On montre que les substituantselectrodonneurs etelectroattracteurs en position 4 Augmentent et diminuent各自la barriere d'interconversion desnathyl-1aires
[EN] NEW ORGANIC COMPOUNDS FOR ELECTROLUMINESCENCE AND ORGANIC ELECTROLUMINESCENT DEVICES USING THE SAME<br/>[FR] NOUVEAUX COMPOSES ORGANIQUES POUR L'ELECTROLUMINESCENCE ET DISPOSITIFS ELECTROLUMINESCENTS ORGANIQUES DANS LESQUELS ILS SONT UTILISES
申请人:LG CHEMICAL LTD
公开号:WO2003095445A1
公开(公告)日:2003-11-20
Disclosed is a novel group of compounds having a general structure of anthracene body substituted with at least one thiophenyl group, which can be further substituted with various substituent groups. These new compounds are generally compatible with organic electroluminescence. Also disclosed are organic electroluminescent devices and method of making the same. The organic electroluminescent devices include at least one of the compounds in various layers thereof. Organic electroluminescent devices employing the new compounds in their light-emitting layers show outstanding stability.
Zinc-promoted, iridium catalyzed reductive alkylation of primary amines with aliphatic ketones in aqueous medium
作者:Renato A. da Silva、Lothar W. Bieber
DOI:10.1016/j.tetlet.2009.11.107
日期:2010.1
The reductive alkylation of primary aromatic and aliphaticamines with aliphatic ketones has been achieved in aqueous acidic medium using commercially available, non-activated zinc dust catalyzed by a very small quantity of iridium bromide. Anilines react well in aqueous formic acid, whereas monoalkylamines require 1,4-dioxane as a co-solvent and sulfuric acid as the proton source. A plausible mechanism
one-electron reduction of DNA bases. Photoinduced excesselectrontransfer in the AN-tethered DNA duplexes has been examined using gel electrophoresis, but the apparent electron-transfer efficiencies were almost the same for both of the cAN- and the mAN-tethered DNA. The marginal effect of cyclopropyl substitution on the efficiency of charge separation suggests that charge recombination in the contact radical