Abstract
Hybrid electrochromic materials are a very important class of compounds, because they enable new and/or better optical and electrochemical properties to be unfolded. This paper reports the synthesis of the new V2O5.1.26H2O([C3N2(C6H7N)3])0.07 using the combination of two traditional methods, melting quenching and sonochemistry. The new material was characterized by several methods in order to verify the physical and chemical characteristics and its possible use as an electrochromic electrode. The organic guest provokes an interlayer spacing decrease of the inorganic matrix and the electrostatic interaction between the oxo groups of the V2O5 matrix and the pyridinium rings of the organic guest demonstrate a strong interaction. The new hybrid nanostructure presented good reversibility and cyclability during 50 cycles, electrochromic efficiency of 22 cm2 C-1 (410 nm) and 96 % color retention after 50 cycles of color changing.
Highlights
Hybrid organic-inorganic materials have been used to develop new technologies based on the combination of organic and inorganic building blocks to generate multifunctional materials
At 700 nm the ∆optical density (OD) showed a little reduction of 4%
These results demonstrate a substantial improvement in cycling efficiency of the hybrid, and that the insertion of the TPI-Me2+ into the inorganic matrix resulted in an assembled hybrid structure which led to the stabilization of the electrochromic response
Summary
Hybrid organic-inorganic materials have been used to develop new technologies based on the combination of organic and inorganic building blocks to generate multifunctional materials. A common method of preparation of organic-inorganic hybrid materials is the intercalation of organic molecules into layered inorganic compounds as transition metals oxides.[1]. Different transition metal oxides are used as hybrid matrixes, for example: TiO2,6-11 Fe2O3,12,13 MnO2,14-16 WO3,17‐21 V2O5,2,22-24 and others. Vanadium pentoxide (V2O5) xerogel has a versatile lamellar structure that can intercalate a wide variety of inorganic and organic guest species.[25,26] Much effort has been made to produce new types of hybrid vanadium oxide/ organic due to their potential applications in different fields such as: secondary batteries, catalysis, supercapacitor, thermochromism and electrochromism.[27,28]
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