The activation of carbon dioxide has been obtained in O-2/CO2 saturated ionic liquids, via electrochemically generated O-2(center dot-), at a less negative potential than the one of the direct cathodic reduction of CO2. This electrochemical activation has been applied to the C-N bond formation from amines and carbon dioxide in the synthesis of organic carbamates. A competitive reaction between electrogenerated superoxide ion and imidazolium cations yielding 2-imidazolones has been pointed out. This procedure allows to avoid the utilization of volatile and toxic organic solvents, supporting electrolytes and catalysts. (C) 2011 Elsevier Ltd. All rights reserved.
Carbon dioxide as carbon source: Activation via electrogenerated O-2(center dot-) in ionic liquids / Feroci, Marta; Chiarotto, Isabella; Monica, Orsini; Giovanni, Sotgiu; Inesi, Achille. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 56:16(2011), pp. 5823-5827. [10.1016/j.electacta.2011.04.067]
Carbon dioxide as carbon source: Activation via electrogenerated O-2(center dot-) in ionic liquids
FEROCI, Marta;CHIAROTTO, Isabella;INESI, ACHILLE
2011
Abstract
The activation of carbon dioxide has been obtained in O-2/CO2 saturated ionic liquids, via electrochemically generated O-2(center dot-), at a less negative potential than the one of the direct cathodic reduction of CO2. This electrochemical activation has been applied to the C-N bond formation from amines and carbon dioxide in the synthesis of organic carbamates. A competitive reaction between electrogenerated superoxide ion and imidazolium cations yielding 2-imidazolones has been pointed out. This procedure allows to avoid the utilization of volatile and toxic organic solvents, supporting electrolytes and catalysts. (C) 2011 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
