title: Salts of highly fluorinated weakly coordinating anions as versatile precursors towards hydrogen storage materials.
abstract: We report the most recent results related to application of a metathetic pathway towards mixed-metal borohydrides. The synthetic protocol utilizes highly-fluorinated weakly coordinating anion salts as precursors. We discuss the technicalities related to the use of fluorine-rich anions as well as the improvements which are still needed to deliver high-purity materials with potential applications for hydrogen storage. The applicability of the method is expanded beyond the previously described complex borohydrides of alkali metal Zn or Y, towards the systems containing Mg(II), Sc(III), Mn(II), or Eu(III). We have prepared for the first time [Ph4P]2[Mn(BH4)4] and [Me4N]2[Mg(BH4)4], solved their crystal structures from powder x-ray diffraction, and used selected organic metal borohydride derivatives as precursors towards mixed-metal borohydrides (K2Mn(BH4)4, Rb3Mg(BH4)5, etc.). We have also prepared [Ph4P][Eu(BH4)4], which is the first derivative of Eu(III) in the homoleptic environment of borohydride anions.
authors.affiliation: Faculty of Physics, University of Warsaw, Pasteura 5, 02093 Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Starobrat
authors.affiliation: Inter-faculty Studies in Mathematics and Natural Sciences, Żwirki i Wigury 93, 02089 Warsaw, Poland.
authors.forename: M J
authors.initials: MJ
authors.lastname: Tyszkiewicz
authors.affiliation: Faculty of Physics, University of Warsaw, Pasteura 5, 02093 Warsaw, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Wegner
authors.affiliation: Faculty of Physics, University of Warsaw, Pasteura 5, 02093 Warsaw, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Pancerz
authors.affiliation: Faculty of Physics, University of Warsaw, Pasteura 5, 02093 Warsaw, Poland.
authors.forename: P A
authors.initials: PA
authors.lastname: Orłowski
authors.affiliation: Centre of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02089 Warsaw, Poland. tjaron@uw.edu.pl w.grochala@cent.uw.edu.pl.
authors.forename: P J
authors.initials: PJ
authors.lastname: Leszczyński
authors.affiliation: Centre of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02089 Warsaw, Poland. tjaron@uw.edu.pl w.grochala@cent.uw.edu.pl.
authors.forename: K J
authors.initials: KJ
authors.lastname: Fijalkowski
authors.affiliation: Centre of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02089 Warsaw, Poland. tjaron@uw.edu.pl w.grochala@cent.uw.edu.pl.
authors.forename: T
authors.initials: T
authors.lastname: Jaroń
authors.affiliation: Centre of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02089 Warsaw, Poland. tjaron@uw.edu.pl w.grochala@cent.uw.edu.pl.
authors.forename: W
authors.initials: W
authors.lastname: Grochala