The use of mixed-metal single source precursors for the synthesis of complex metal oxides

Abstract

This Feature Article highlights the use of mixed-metal single source precursors to directly access useful complex metal oxide materials.

Investigations into the structure, reactivity, and AACVD of aluminium and gallium amidoenoate complexes

“…In recent decades, precursor design and synthesis has become increasingly important for the deposition of functional materials. [1][2][3][4] Specifically, the customization of precursors which deliver specific properties demanded by the deposition technique such as volatility or solubility have placed 'designer' precursors center-stage for a wide-range of material deposition techniques, including aerosol-assisted chemical vapor deposition (AACVD), [4][5][6][7][8] spin-coating, [9][10][11] or by ink deposition. [12][13][14] Recently, investigations into the structural parameters of metal-containing molecular precursors have been carried out in order to probe relationships between a precursor's molecular geometry (dictated by the bonding modes of the ligands bound to the metal) and their suitability for deposition.…”

Low Temperature Deposition of Highly Cyclable Porous Prussian Blue Cathode for Lithium‐Ion Microbattery

“…However, such techniques need expensive instrumentation, high vacuum and high temperature conditions, exotic organometallic precursors as starting reagents, etc. [14,15] This limits the spectrum of material engineering that can be performed on Si wafers or other low temperature polymer substrates for onchip energy storage systems. This is especially true for cathode materials, which need high temperature annealing treatments (≈300-800 °C) for better crystallinity and electrochemical performance, even if performed by state-of-theart ALD, sputtering techniques, or from conventional slurry coating.…”

Unusual Reactivity of Silicon Grease Towards Metal Alkoxides: Serendipity for Structural Chemistry

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] These molecular control of synthesized complexes offer the possibility of single-source precursor fabrication for target ternary and quaternary phase preparation. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Metal alkoxides are versatile precursors for oxide-ceramics largely due to their unique structural diversity, intrinsic propensity towards hydrolysis, presence of preformed strong MÀ O bonds and defined decomposition mechanism. [2,11,12] The preparation of mixedmetallic complexes with pre-defined metal ratio appropriate for the desired materials synthesis (e. g., [MgAl 2 (OR) 8 ] for MgAl 2 O 4 , R=tBu, iPr) [3] is often not a straightforward preparative task, and strongly influenced by different parameters like chosen ligands, reaction temperatures, solvents and combined metals.…”

“…In recent years, enormous efforts have been made in the construction of heterometallic alkoxides, which display the target material composition already at the molecular level [1–20] . These molecular control of synthesized complexes offer the possibility of single‐source precursor fabrication for target ternary and quaternary phase preparation [1–20] . Metal alkoxides are versatile precursors for oxide‐ceramics largely due to their unique structural diversity, intrinsic propensity towards hydrolysis, presence of preformed strong M−O bonds and defined decomposition mechanism [2,11,12] .…”