Freixa's Group » Quimica

Jul 31

by ZFreixa in People, Quimica 0 comments

Pablo Corral & Mikel Sanz defended their final projects.

On Tuesday 11th July Mikel Sanz and Pablo Corral defended their Final Degree Projects.

Feb 04

by ZFreixa in Meetings, Quimica, seminar 0 comments

Second CTQ2015-65268-C2 Workshop

On Friday 26th of January the second workshop on the progress of our Coordinated Project (CTQ2015-65268-C2) H2MET2015 was held in San Sebastián at UPV-EHU. All the researchers involved in the project presented their latest results. External researchers from the Department were also invited to contribute.

Dic 06

by ZFreixa in Quimica 0 comments

Experimental Evidence Supporting Related Mechanisms for Ru(II)-Catalyzed Dehydrocoupling and Hydrolysis of Amine-Boranes

Our last work on the mechanism of the hydrolytic decomposition of amine-boranes just published in ACS Catalysis. A family of ruthenium(II) half-sandwich complexes was tested for the hydrolytic decomposition of amine-boranes. The analysis of the catalytic results, together with a multilateral approach based on 1H, 11B NMR, and ESI-MS were used to propose a plausible and conceptually unified mechanism for both the hydrolysis and competitive dehydrogenation of amine-boranes. We propose the intermediacy of solvent-stabilized borenium cations during the catalytic cycle, evolving toward dehydrogenation products in distilled THF or releasing amine-hydroxyboranes in aqueous media. Both reaction pathways would liberate up to 1 equivalent of hydrogen through a metal-catalyzed process, but an out-of-cycle low-barrier hydrolysis of amine-hydroxyboranes would produce the 2 additional equivalents of hydrogen in aqueous solutions. Metal-catalyzed deuteration of (non hydrogen-productive) trisubstituted amine-boranes by using D2O as deuterium source was observed, and included as part of the mechanism proposal.

Nov 11

by ZFreixa in Cities, Meetings, Quimica, seminar, Zoraida 0 comments

Summer School on Catalysis, Quingao 2017

It was a real pleasure to teach at the Catalysis Summer School at the Quingdao University of Petroleum (China, summer 2017).

Feb 04

by ZFreixa in Meetings, People, Quimica, seminar, Sin categoría, Zoraida 0 comments tags: lectures, Meetings, seminars, UAB, Zoraida

Seminar at UAB

It was a nice day, meeting friends and colleagues. Thanks for the invitation!

Ene 21

by ZFreixa in Meetings, People, Quimica, Zoraida 0 comments tags: Meetings

First CTQ2015-65268-C2 Workshop

On Thrursday 12th of January the first workshop on the progress of our Coordinated Project (CTQ2015-65268-C2) H2MET2015 was held in San Sebastián at UPV-EHU. All the researchers involved in the project presented their latest results. External researchers from the Department were also invited to contribute.

Sep 17

by FreixaGroup in Metales, Quimica 0 comments

Our research line

The long-term goal of the research line that we pursue since is the development of light-tunable organometallic compounds, for a wide range of applications, being catalysis the central part of it. After some initial explorative years, nowadays we have a set of synthetic tools, and we are ready to incorporate azobenzene derivatives in a wide range of compounds. In these years we have synthesized more than 60 new azobenzene-appended organometallic complexes, and studied them for several applications: iridium(III) triscyclometalated for phosphors in OLEDs, and ruthenium(II) and iridium(III) half-sandwich complexes to be used as photoswitchable catalysts for hydrogen generation, or ruthenium(II) compounds as drugs for cancer therapy are the first examples we worked on. Expanding the range of compounds, and applications together with gaining a better understanding and control of their interaction with light is our daily task that should bring us through a path of amazing discoveries.

Sep 16

by FreixaGroup in Metales, Nature, Quimica, Sin categoría 0 comments

Ainara’s PhD Defence

Ainara Telleria defended her PhD on 22nd July 2016. She was awarded Doctor Cum Laude with International Mention.

Sep 25

by ZFreixa in Entrevista, Quimica, Sin categoría, Zoraida 0 comments tags: Entrevista, Investigación, Química, Universidad, Zoraida

En el mapa de la ciencia

Muchos no se conocen, pero cuando el fotógrafo les pide que hablen entre ellos para parecer más naturales no lo dudan ni un momento y comienzan a conversar como viejos amigos. Es como si tuvieran algo en común y ciertamente lo tienen, porque las ocho personas que se han citado en el centro Joxe Mari Korta para participar en una sesión fotográfica son investigadores. Faltan dos que no han podido acudir al encuentro por motivos de trabajo pero no por ello dejarán de salir en estas páginas. Son diez investigadores del más alto nivel que han venido a trabajar a Gipuzkoa atraídos por la fundación Ikerbasque y forman parte del grupo de 125 personas procedentes de veinte países que se han incorporado de forma permanente a las universidades y centros de investigación del País Vasco. Su aportación se puede medir de forma económica ya que, según la fundación, los científicos contratados por Ikerbasque han logrado un retorno para Euskadi de 17,5 millones de euros, lo que supone que por cada euro invertido por el Gobierno Vasco en esta entidad se obtienen dos euros. Es una aportación importante pero, sobre todo, estos diez investigadores que se dedican a ramas tan diversas […]