Crystalline inorganic frameworks with 56-ring, 64-ring, and 72-ring channels

Area of Science:

• Materials Science
• Inorganic Chemistry
• Nanotechnology

Background:

• Zeolite-like structures with extra-large pores (>12-membered rings, 12R) are challenging to synthesize in crystalline forms.
• Current methods often yield either crystalline materials with smaller pores or noncrystalline materials with larger pores.

Purpose of the Study:

• To develop a synthetic strategy for creating crystalline porous inorganic frameworks with systematically tunable extra-large pores.
• To explore the potential of these materials for applications such as photoluminescence.

Main Methods:

• Integration of templating mechanisms for zeolites and mesoporous silica in a single synthetic system.
• Synthesis of gallium zincophosphite frameworks.
• Characterization of pore size and photoluminescent properties.

Main Results:

• Achieved systematic tuning of channel sizes in gallium zincophosphites from 24R to 72R.
• Demonstrated the creation of white-light photoluminescence via Mn(2+) doping.
• Materials exhibited low thermal stability and retained templating agents.

Conclusions:

• A viable design strategy for crystalline porous materials with tunable micro- and mesopores was established.
• The synthesized materials show potential for optoelectronic applications.
• Further research is needed to improve thermal stability.