Novel carbonyl iron–bismuth clusters – synthesis, structure, CO2 insertion and potential as molecular precursors for BiFeO3

Carbon monoxide insertion at a heavy p-block element: unprecedented formation of a cationic bismuth carbamoyl

“…8 In an alternative strategy without any E–E multiple bonding, the hypervalent bismuth compound Bi(C 6 H 4 CH 2 ) 2 N t Bu(OMe) with one polar Bi–O bond has been shown to undergo reversible CO 2 fixation under mild reaction conditions (Scheme 1c). 9,10…”

Cyclopentadienyl Dicarbonyl Iron‐Bismuth Compounds – Synthesis, Structure, and Reactivity

“…Complexes with a bismuth‐transition metal bond have gained significant attention over the last years mainly because of interesting bonding situations but also as precursors for heterometallic oxides 1–3. Among these type of heterometallic bismuth complexes those with iron4–13 have been intensely investigated but other metals such as rhenium,14 ruthenium,15 molybdenum,16–18 manganese,19 tungsten,20,21 and gold22 have also attracted recent interest. Some of these complexes offer potential as single source precursors, but the choice of the ligands is still a challenge with regard to the problem of carbon contamination in the final product.…”

Sintering and microstuctural characterization of W6+, Nb5+ and Ti4+ iron-substituted BiFeO3

“…This high leakage current is mainly attributed to the presence of secondary phases, namely the Bi-rich sillenite type Bi 25 FeO 39 phase and the Fe-rich mullite type Bi 2 Fe 4 O 9 phase, and to defects in the crystal structure, such as oxygen vacancies originated by the reduction of Fe 3+ to Fe 2+ [3,4]. Many attempts are being done in order to obtain pure BiFeO 3 using methods such as chemical synthesis (including co-precipitation [5], sol-gel [6], polymerizable complex methods [7] and hydrothermal or solvothermal synthesis [8,9]) mechanical activated synthesis [10], micro-wave assisted synthesis [11,12] or rapid-sintering [13]. However, up to date, the obtaining of bismuth ferrite as a pure-single phase product still represents a major challenge.…”