Metal Borohydrides beyond Groups I and II: A Review

This review consists of a compilation of synthesis methods and several properties of borohydrides beyond Groups I and II, i.e., transition metals, main group, lanthanides, and actinides. The reported properties include crystal structure, decomposition temperature, ionic conductivity, photoluminescence, etc., when available. The compiled properties reflect the rich chemistry and possible borohydrides' application in areas such as hydrogen storage, electronic devices that require an ionic conductor, catalysis, or photoluminescence. At the end of the review, two short but essential sections are included: a compilation of the decomposition temperature of all reported borohydrides versus the Pauling electronegativity of the cations, and a brief discussion of the possible reactions occurring during diborane emission, including some strategies to reduce this inconvenience, particularly for hydrogen storage purposes.

Automated summary

This review provides a compilation of synthesis methods and properties of borohydrides beyond Groups I and II. The properties include crystal structure, decomposition temperature, ionic conductivity, and photoluminescence, reflecting the rich chemistry and potential applications of borohydrides in various fields. The review also includes a comparison of decomposition temperature with cation electronegativity and a discussion of reactions during diborane emission, offering strategies to reduce inconveniences, particularly for hydrogen storage purposes.