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Cyanoborates
Author(s) -
Ignat'ev Nikolai V.,
Finze Maik
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900403
Subject(s) - chemistry , boron , ionic liquid , alkali metal , nucleophile , electrochemistry , supramolecular chemistry , alkyl , coordination complex , halogen , aryl , trifluoromethyl , ionic bonding , alkoxy group , inorganic chemistry , organic chemistry , metal , ion , molecule , catalysis , electrode
Cyanoborate chemistry has emerged to an important topic during the last two decades, beginning with two independent reports on the successful synthesis of the tetracyanoborate anion [B(CN) 4 ] – in 2000. A wealth of cyanoborate anions with different substituents in addition to CN group(s) bonded to boron, i.e . hydrogen, halogen, aryl, alkenyl, alkyl, perfluoroalkyl, and alkoxy, have been developed, which enable the tuning of properties of compounds and materials based on them. The readily accessible alkali metal cyanoborates are convenient starting materials for the preparation of cyanoborates with various organic, inorganic, and metal cations as well as cyanoborate coordination compounds. A focus has been on low‐viscosity room temperature cyanoborate‐ionic liquids that are of interest for various applications, especially for electrochemical devices such as dye sensitized solar cells (DSSC) and supercapacitors. Many other potential applications of these novel substances in chemistry and materials science have been studied. Furthermore, cyanoborates are promising starting compounds for the synthesis of other boron species, for example the weakly coordinating tetrakis(trifluoromethyl)borate anion [B(CF 3 ) 4 ] – and the boron‐centered nucleophile B(CN) 3 2– . In this review the syntheses, chemical and physicochemical properties, and selected applications of cyanoborates are presented and discussed.