Cd[B2(SO4)4] and H2[B2(SO4)4] – a phyllosilicate-analogous borosulfate and its homeotypic heteropolyacid. Issue 40 (26th September 2022)

• Record Type: Journal Article
• Authors: Hämmer, Matthias; Pasqualini, Leonard C.; Sebastian, Sean S.; Huppertz, Hubert; Höppe, Henning A.; Bruns, Jörn
• Is Part Of: Dalton transactions. Volume 51:Issue 40(2022)
• Page Start: 15458
• Page End: 15466
• Publication Date: 2022-09-26
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt02344j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The phyllosilicate-analoguous borosulfate H2 [B2 (SO4 )4 ] and its cadmium salt, Cd[B2 (SO4 )4 ], have been synthesized via various paths and analyzed thoroughly. The heteropolyacid is the second structurally determined acid within borosulfate chemistry. Abstract : Borosulfates consist of heteropolyanionic networks of corner-shared (SO4 )- and (BO4 )-tetrahedra charge compensated by metal or non-metal cations. The anionic substructures differ significantly, depending on the different branching of the silicate-analogous borosulfate building blocks. However, only one acid has been characterized by single crystal X-ray diffraction so far. Herein, we present H2 [B2 (SO4 )4 ] as the first phyllosilicate analogue representative, together with the homeotypic representative Cd[B2 (SO4 )4 ]. The latter can be considered the cadmium salt of the former. Their crystal structures and crystallographic relationship are elucidated. For H2 [B2 (SO4 )4 ], the bonding situation is examined using Hirshfeld-surface analysis. Further, the optical and thermal properties of Cd[B2 (SO4 )4 ] are investigated by FTIR and UV-Vis spectroscopy, thermogravimetry, as well as temperature-programmed powder X-ray diffraction.