Synthesis of CoFe Prussian blue analogue/poly vinylidene fluoride nanocomposite material with improved thermal stability and ferroelectric properties

Prussian blue analogues (PBAs) have recently been synthesized in the form of various heterostructures such as core-shell nanoparticles, layered thin films, and nanosized metal/PBAs for their multifunctional properties. However, herein, we report the synthesis of a nanocomposite CoFe Prussian blue an...

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Bibliographic Details
Published in:New journal of chemistry 2018, Vol.42 (6), p.4567-4578
Main Authors: Bhatt, Pramod, Meena, Sher Singh, Mukadam, M. D, Mandal, Balaji P, Chauhan, A. K, Yusuf, S. M
Format: Article
Language:English
Subjects:
Analogs
Beta phase
Chemical industry
Chemical synthesis
Composite materials
Cyanides
Dipole interactions
Dipoles
Electric polarization
Ferroelectric materials
Ferroelectricity
Fluorides
Heterostructures
Nanocomposites
Pigments
Polyvinylidene fluorides
Thermal stability
Thin films
Vinylidene fluoride
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Summary:Prussian blue analogues (PBAs) have recently been synthesized in the form of various heterostructures such as core-shell nanoparticles, layered thin films, and nanosized metal/PBAs for their multifunctional properties. However, herein, we report the synthesis of a nanocomposite CoFe Prussian blue analogue (CoFePBA) molecular magnet with a polyvinylidene fluoride (PVDF) polymer. The cyanide (CN) group of CoFePBAs interacts with the CF 2 dipole of PVDF to integrate PBAs uniformly into a PVDF matrix. Interestingly, the composite material exhibits a spontaneous polarization which is mainly due to the formation of the β phase of PVDF. However, the value of electric polarization is observed to be higher (∼0.04 μC cm −2 ) than the spontaneous electric polarization (∼0.02 μC cm −2 ) of the bare PVDF. The higher value of electric polarization is attributed to the enhanced dipole-dipole interactions between the fluoride atoms of PVDF and the cyanide (-C&z.tbd;N-) ligand of CoFePBAs. Inclusion of PVDF in CoFePBAs not only helps in improving ferroelectricity, but also improves the thermal stability of the CoFePBAs (up to ∼158 °C), in contrast to the bare CoFePBAs, which are stable only up to ∼65 °C. Synthesis of a nanocomposite CoFe Prussian blue analogue (CoFePBA) molecular magnet with a polyvinylidene fluoride (PVDF) polymer show improved thermal stability and ferroelectric properties.
ISSN:1144-0546
1369-9261
DOI:10.1039/c8nj00451j