Two-Dimensional Electrically Conductive Metal-Organic Frameworks: Insights and Guidelines from Theory

Area of Science:

• Materials Science
• Chemistry
• Physics

Background:

• Two-dimensional (2D) metal-organic frameworks (MOFs) are emerging as multifunctional materials with electrical conductivity, permanent porosity, and high surface area.
• These properties make 2D MOFs promising for applications in batteries, semiconductors, and supercapacitors.
• Computational tools are crucial for understanding structure-property relationships but face challenges due to high computational costs.

Purpose of the Study:

• To map the structure-property-function relationships of electrically conductive (EC) MOFs.
• To present a comprehensive database of EC MOFs and discuss the application of machine learning (ML) for materials discovery.
• To highlight the role of material flexibility in electrical conductivity and introduce advanced simulation techniques.

Main Methods:

• Quantum mechanical calculations (e.g., DFT) to determine thermodynamic stability, electronic structure, and photochemical reactivity.
• Development and utilization of the EC-MOF Database, containing 1057 structures with calculated electronic properties.
• Application of machine learning (ML) techniques for high-throughput property predictions and molecular dynamics (MD) simulations using neural network potentials (NNPs).

Main Results:

• Detailed analysis of selected EC MOFs, including their stability, electronic structure, and reactivity.
• The EC-MOF Database provides a valuable resource for researchers, containing crystal structures and DFT-calculated electronic properties.
• ML models demonstrate high-throughput property prediction capabilities, and NNPs offer efficient alternatives to AIMD for simulating material flexibility and conductivity.

Conclusions:

• The study provides computationally-ready data and ML models to facilitate the design and synthesis of novel EC MOFs.
• Accessible theoretical insights and resources can accelerate the development of 2D EC MOFs for compact electronic devices.
• Further research leveraging these tools is expected to unlock the full potential of 2D EC MOFs in various technological applications.