Abstract
A systematic study of the thermal decomposition of hybrid perovskites of formula [AH][M(HCOO)3] under inert atmosphere was performed by means of thermogravimetry and simultaneous infrared spectroscopy of the evolved gases. The influence of: (i) the metal ion of the [M(HCOO)3]- framework and (ii) the guest [AH]+ cation, in the composition of the final residue was evaluated. In this work, it has been demonstrated that these materials can be used as precursors of metal or metal-oxide compounds—obtained free of carbon—, and that the composition of the final residue is determined by the standard reduction potential of the metal cation of the framework.
Highlights
IntroductionIntroduction oxide materials is of interestHybrid perovskites are some of the most studied covalent frameworks due topolymers their interesting functional properties reported along the by lastmetal two Coordination are hybrid inorganic/organic structures formed decades.Amongthat them, of the formula ] (Figure1) or have atcation centers are compounds linked by organic ligands,[AH][M(HCOO)in the form of 3one-, two-, threedimensional crystallineguestmagnetic molecules weakly bonded to the tracted great interest duestructures.to their dielectric [18,19,20],[21,22], and multiferroic framework can be located inside the structure (see Figure 1, as an example). [23,24,25,26] properties. solids2020011
Afterwards, the framework collapses and the organic linkers are released as CO2 or converted into a carbon matrix. The research in this field has been focused on the use of porous coordination polymers thermally treated under inert conditions for the preparation of core-shell nanocomposites which consist in metal or metal oxide nanoparticles embedded in carbon porous nanostructures, respectively named M@C or MO@C [16,17]
For some applications, the carbon matrix can be more of a handicap than an asset. It is worth looking for different coordination polymers formed by ligands of variable length to evaluate the possibility of obtaining metal products free of carbon
Summary
Introduction oxide materials is of interestHybrid perovskites are some of the most studied covalent frameworks due topolymers their interesting functional properties reported along the by lastmetal two Coordination are hybrid inorganic/organic structures formed decades.Amongthat them, of the formula ] (Figure1) or have atcation centers are compounds linked by organic ligands,[AH][M(HCOO)in the form of 3one-, two-, threedimensional crystallineguestmagnetic molecules weakly bonded to the tracted great interest duestructures.to their dielectric [18,19,20],[21,22], and multiferroic framework can be located inside the structure (see Figure 1, as an example). [23,24,25,26] properties. solids2020011. Hybrid perovskites are some of the most studied covalent frameworks due topolymers their interesting functional properties reported along the by lastmetal two Coordination are hybrid inorganic/organic structures formed decades. 1) or have atcation centers are compounds linked by organic ligands,[AH][M(HCOO). In the form of 3one-, two-, threedimensional crystalline. Guestmagnetic molecules weakly bonded to the tracted great interest duestructures. To their dielectric [18,19,20],. [21,22], and multiferroic framework can be located inside the structure (see Figure 1, as an example). [23,24,25,26] properties.
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