Polyoxoplatinates as covalently dynamic electron sponges and molecular electronics materials

Area of Science:

• Inorganic Chemistry
• Materials Science
• Computational Chemistry

Background:

• Dynamic covalent chemistry (covalent dynamics) enables adaptive molecular assemblies in organic systems.
• Covalent dynamics is crucial for designing self-healing materials, sensors, and actuators.
• Inorganic systems offer unique opportunities for exploring dynamic covalent chemistry principles.

Purpose of the Study:

• To investigate the structural, electronic, and transport properties of a platinum-based polyoxometalate (POM).
• To demonstrate the manifestation of dynamic covalent chemistry in fully inorganic systems.
• To explore the potential of POMs in electronic applications, particularly concerning electron conduction and spin polarization.

Main Methods:

• Density Functional Theory (DFT) calculations were employed.
• Structural, electronic, and transport properties of the [Pt12O8(SO4)12]4- POM and its derivatives were simulated.
• Simulations of an Au/POM/Au junction were performed to analyze electron conduction.

Main Results:

• The Pt-based POM exhibits six redox-responsive {O-Pt-Pt-O} moieties with potential for storing up to twelve electrons.
• Electron conduction in the Au/POM/Au junction is highly dependent on the POM's redox state but less sensitive to its rotational orientation.
• The POM demonstrates promising spin-polarized current behavior, tunable via bias and gate voltages.

Conclusions:

• The study exemplifies inorganic dynamic covalent chemistry through the redox-responsive Pt-based POM.
• The POM's tunable electron conduction and spin-polarized properties suggest its potential for advanced electronic devices.
• This research opens avenues for designing novel inorganic materials based on dynamic covalent principles.