Issue 45, 2015

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 MgII, ScIII, MnII, or EuIII. 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 EuIII in the homoleptic environment of borohydride anions.

Graphical abstract: Salts of highly fluorinated weakly coordinating anions as versatile precursors towards hydrogen storage materials

  • This article is part of the themed collection: Fluorine

Supplementary files

Article information

Article type
Paper
Submitted
28 mai 2015
Accepted
22 juil. 2015
First published
05 août 2015

Dalton Trans., 2015,44, 19469-19477

Author version available

Salts of highly fluorinated weakly coordinating anions as versatile precursors towards hydrogen storage materials

A. Starobrat, M. J. Tyszkiewicz, W. Wegner, D. Pancerz, P. A. Orłowski, P. J. Leszczyński, K. J. Fijalkowski, T. Jaroń and W. Grochala, Dalton Trans., 2015, 44, 19469 DOI: 10.1039/C5DT02005K

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