Progress toward Solid State Synthesis by Design.

Area of Science:

• Solid State Chemistry
• Materials Science

Background:

• Human history is marked by material ages (stone, bronze, iron) and currently the silicon age, driven by transistor technology.
• Advancing technology necessitates the discovery of new materials with enhanced properties.
• Solid state chemistry focuses on discovering new materials and phenomena, with a shift towards "materials by design".

Purpose of the Study:

• To review common synthesis techniques for metastable materials.
• To break down the underlying chemistry of these syntheses into fundamental reaction mechanisms.
• To identify driving parameters and future directions in materials discovery.

Main Methods:

• Review of common synthesis techniques for metastable materials.
• Analysis of reaction kinetics and thermodynamics governing material formation.
• Identification of driving parameters: Le Chatelier's principle, thermo-kinetic coupling, and activation energy manipulation.
• Exploration of supercritical fluids as novel reaction environments.

Main Results:

• Most metastable material syntheses can be understood through three key driving parameters.
• Several materials are identified whose syntheses are explained by one or a combination of these parameters.
• Supercritical fluids offer unique solvation properties for new material synthesis by tuning fluid density.

Conclusions:

• A deep understanding of reaction kinetics and thermodynamics is crucial for the synthesis of stable and metastable solids.
• Materials discovery is transitioning from serendipity to rational design.
• Future materials synthesis requires collaboration between synthetic chemists and computational chemists for "synthetic harmony".