Éditeur(s) : HAL CCSD
Résumé : International audience
The corrosion rates in the presence of some indole derivates, namely, 9H-pyrido[3,4-b]indole (norharmane) and 1-methyl-9H-pyrido[3,4-b]indole (harmane), as inhibitors of C38 steel corrosion inhibitor in 1 M HCl solution, were measured by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques, in the range of temperatures from 25 to 55∘C. Results obtained revealed that the organic compounds investigated have inhibiting properties for all temperatures. The inhibition was assumed to occur via adsorption of the indole molecules on the metal surface. Adsorption of indole derivates was found to follow the Langmuir isotherm. The apparent activation energies, enthalpies, and entropies of the dissolution process and the free energies and enthalpies for the adsorption process were determined by potentiodynamic polarization and electrochemical impedance. The fundamental thermodynamic functions were used to collect important information about indole inhibitory behaviour.
international Journal of Corrosion

hal-01683120
https://hal.univ-antilles.fr/hal-01683120
DOI : 10.1155/2013/139798

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
ISSN: 0010-938X

hal-01683132
https://hal.univ-antilles.fr/hal-01683132
DOI : 10.1016/j.corsci.2014.12.005

Éditeur(s) : HAL CCSD
Résumé : 00000
International audience
Australian Journal of Chemistry - an International Journal for Chemical Science publishes research papers from all fields of chemical science.
Australian Journal of Chemistry

hal-01483154
https://hal.archives-ouvertes.fr/hal-01483154
DOI : 10.1071/CH16455

Éditeur(s) : HAL CCSD Elsevier
Résumé : 00000 ăWOS:000386415300011
International audience
Highly biologically active marine sesquiterpene ilimaquinone was selected for chemical modifications. Its biotransformation was investigated using a combinatorial approach as an original way to screen different strains of microorganisms. Mucor circinelloides ATCC 8541 was able to structurally modify ilimaquinone into three different compounds. A stereospecific epoxidation was observed and compared to chemical epoxidation. A hydroxylation of the decalin ring was also observed as well as an unexpected substitution on the quinone ring by ethanolamine. Compounds were evaluated against several cell lines. (C) 2016 Elsevier Ltd. All rights reserved.
ISSN: 0040-4039

hal-01483185
https://hal.archives-ouvertes.fr/hal-01483185
DOI : 10.1016/j.tetlet.2016.09.075