000064421 001__ 64421
000064421 005__ 20231127095530.0
000064421 0247_ $$2doi$$a10.1088/1742-6596/712/1/012052
000064421 0248_ $$2sideral$$a103710
000064421 037__ $$aART-2016-103710
000064421 041__ $$aeng
000064421 100__ $$0(orcid)0000-0002-9706-3272$$aBlasco, Javier$$uUniversidad de Zaragoza
000064421 245__ $$aLocal structure of Iridium organometallic catalysts covalently bonded to carbon nanotubes
000064421 260__ $$c2016
000064421 5060_ $$aAccess copy available to the general public$$fUnrestricted
000064421 5203_ $$aHybrid catalysts based on Iridium N-heterocyclic carbenes anchored to carbon nanotubes (CNT) have been studied by XAFS spectroscopy. Oxidation of CNT yields a large amount of functional groups, mainly hydroxyl groups at the walls and carboxylic groups at the tips, defects and edges. Different kinds of esterification reactions were performed to functionalize oxidized CNT with imidazolium salts. Then, the resulting products were reacted with an Ir organometallic compound to form hybrid catalysts efficient in hydrogen transfer processes. XANES spectroscopy agree with the presence of Ir(I) in these catalysts and the EXAFS spectra detected differences in the local structure of Ir atoms between the initial Ir organometallic compound and the Ir complexes anchored to the CNT. Our results confirm that the halide atom, present in the Ir precursor, was replaced by oxygen from -OH groups at the CNT wall in the first coordination shell of Ir. The lability of this group accounts for the good recyclability and the good efficiency shown by these hybrid catalysts.
000064421 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E07$$9info:eu-repo/grantAgreement/ES/DGA/E69$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2010-15221$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38213-C02-01
000064421 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000064421 592__ $$a0.24$$b2016
000064421 593__ $$aPhysics and Astronomy (miscellaneous)$$c2016$$dQ3
000064421 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000064421 700__ $$0(orcid)0000-0002-8021-8709$$aCuartero, Vera
000064421 700__ $$0(orcid)0000-0002-9029-1977$$aSubías, Gloria$$uUniversidad de Zaragoza
000064421 700__ $$0(orcid)0000-0002-0545-9107$$aJiménez, M. Victoria$$uUniversidad de Zaragoza
000064421 700__ $$0(orcid)0000-0002-3327-0918$$aPérez-Torrente, Jesús J.$$uUniversidad de Zaragoza
000064421 700__ $$0(orcid)0000-0001-7154-7239$$aOro, Luis A.$$uUniversidad de Zaragoza
000064421 700__ $$aBlanco, Matías
000064421 700__ $$aÄlvarez, Patricia
000064421 700__ $$aBlanco, Clara
000064421 700__ $$aMenéndez, rosa
000064421 7102_ $$12010$$2760$$aUniversidad de Zaragoza$$bDpto. Química Inorgánica$$cÁrea Química Inorgánica
000064421 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000064421 773__ $$g712, 012052 (2016), [5 pp.]$$pJ. Phys.: Conf. Ser.$$tJournal of Physics: Conference Series$$x1742-6588
000064421 8564_ $$s334906$$uhttps://zaguan.unizar.es/record/64421/files/texto_completo.pdf$$yVersión publicada
000064421 8564_ $$s100049$$uhttps://zaguan.unizar.es/record/64421/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000064421 909CO $$ooai:zaguan.unizar.es:64421$$particulos$$pdriver
000064421 951__ $$a2023-11-27-09:46:24
000064421 980__ $$aARTICLE