Self-Assembly Method for Synthesizing High-Dimensional EMOFs with High Stability and Laser Response.

Area of Science:

• Materials Science
• Chemistry
• Energetic Materials

Background:

• Energetic metal-organic frameworks (EMOFs) performance is influenced by dimensionality and solvent molecules.
• High-dimensional EMOFs generally offer superior stability and reduced sensitivity.
• Solvent removal can lead to structural collapse and decreased stability in EMOFs.

Purpose of the Study:

• To synthesize zero-dimensional (0D) and high-dimensional EMOFs using coordinated water and ethanol.
• To investigate the effect of dimensionality and solvent molecules on EMOF properties.
• To develop a green and efficient synthesis method for stable high-dimensional EMOFs.

Main Methods:

• Hydrothermal and self-assembly synthesis methods were employed.
• Synthesized zero-dimensional (0D) Co(AFTO)2·(H2O)2 (EMOF 1) and Ni(AFTO)2·(H2O)2 (EMOF 2).
• Synthesized high-dimensional [Co(AFTO)2]·EtOH (EMOF 3) and [Ni(AFTO)2] (EMOF 4) using AFTO ligand (5-(4-amino-furazan-3-yl)-1-hydroxytetrazole).

Main Results:

• EMOF 3 and EMOF 4 demonstrated excellent thermal stability.
• EMOF 3 and EMOF 4 exhibited low mechanical sensitivity.
• The self-assembly in ethanol is a simple, effective, and green technique for high-dimensional EMOFs.

Conclusions:

• High-dimensional EMOFs (3 and 4) possess remarkable stability and low sensitivity.
• The self-assembly method in ethanol is suitable for producing stable, high-dimensional EMOFs.
• EMOF 3 and EMOF 4 show potential as primary green laser explosives.