Pramod Bhatt (Bhabha Atomic Research Centre Mumbai, India) Hybrid Organic-Inorganic Low Dimensional Molecule Based Magnetic Materials for Energy Applications

Hybrid molecular materials show interesting physical properties that are important for various technological applications like in the field of optoelectronics, organic spintronics, gas and energy storage, ferroelectric, thermoelectric and waste management etc. For magnetic applications, these materials should have ordering temperature near or above room temperature, however most do not exhibit. Nevertheless, some of magnetic applications are in the state of exploration and realization of devices working at ambient conditions. Therefore, we have focused to enhance magnetic ordering temperature by adopting new synthesis strategies and by using different transition metals ions. I will present some of the recent experimental results on low dimensional magnetic properties of Prussian blue analogues and oxalate-based compounds. In addition, their multifunctional properties along with applications will be presented [1-5]. For example, the mixing of oxalate and phenanthroline ligands with metal ions at room temperature followed by hydrothermal treatment results in the formation of one–dimensional single chain molecular magnets which exhibit dielectric and ferroelectric behaviour. The observed electric dipole moment, essential for a ferroelectricity, has been understood quantitatively in terms of lattice distortions at two different lattice sites within the crystal structure. Further, in order to enhance the storage capacity of hydrogen, we have adopted new strategy based on synthesis of core–shell structure of Prussian blue analogue and could enhanced the hydrogen capacity (2.0 wt% at 123 K) as compared to bare–core as well as other previously reported compounds. Those compounds are also investigated for sustainable energy storage devices like batteries and supercapacitors. The research emphasizes that there is an immense scope of using such materials for possible technological applications in near future because of their multifunctional properties.

Cluster spin-glass state with magnetocaloric effect in open framework structure of the Prussian blue analog molecular magnet K2x/3Cu[Fe(CN)6]2/3 .nH2O
Pramod Bhatt, N Maiti, M D Mukadam, S S Meena, A Kumar, S M Yusuf
Physical Review B, Under Review (2023)

Electrochemical capacitance and cubic-rhombohedral phase transition of sodium intercalated ferrimagnetic manganese hexacyanoferrate based open framework material
Pramod Bhatt, M K Sharma, M D Mukadam, S S Meena, S M Yusuf
Sustainable Materials and Technologies 35, e00532 (2023)

Enhanced hydrogen adsorption in alkali metal-based copper hexacyanoferrate Prussian blue analogue nanocubes
Pramod Bhatt, S Banerjee, M D Mukadam, P Jha, M Navaneethan, S M Yusuf
Journal of Power Sources 542, 231816 (2022)

Octahedral Lattice Distortion-Driven Ferroelectricity and Canted Antiferromagnetism in Oxalate and Phenanthrolin Ligand-Based Chain Molecular Magnets [{Fe(Δ)Fe(Λ)}1–x{Cr(Δ)Cr(Λ)}x (ox)2(phen)2]n (x= 0, 0.1, and 0.5)
Pramod Bhatt, A Kumar, C Ritter, S M Yusuf

The Journal of Physical Chemistry C 124, 19228-19239 (2020)

Structural, electrochemical and catalytic activity of Prussian blue analogues embedded with functionalized carbon for solid state battery applications
S P S Shaikh, Pramod Bhatt, S M Yusuf, S N Bhange, S Bansod, A M Abdalla
International Journal of Hydrogen Energy 45, 15317 (2020)