Robust Zeolitic Tetrazole Framework for Electrocatalytic Dopamine Detection with High Selectivity

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Zeolitic frameworks offer tunable properties for various applications.
• Zeolitic imidazole framework-8 (ZIF-8) is a well-studied material with a sodalite topology.
• Developing new frameworks with enhanced stability and functionality is crucial.

Purpose of the Study:

• To synthesize and characterize a novel zeolitic tetrazolate framework (ZTF-8).
• To investigate the stability and structural properties of ZTF-8.
• To explore the potential of ZTF-8 for electrochemical sensing applications, specifically dopamine detection.

Main Methods:

• Solvent-free, heat-assisted mechanochemical synthesis of ZTF-8 from zinc acetate and 5-methyl tetrazole.
• Structural characterization and stability testing in acidic and basic aqueous solutions.
• Electrochemical detection of dopamine using ZTF-8, including sensitivity, selectivity, and DFT studies.

Main Results:

• ZTF-8 was successfully synthesized with a sodalite (SOD) topology, similar to ZIF-8 but with uncoordinated N-heteroatom sites.
• ZTF-8 exhibited exceptional stability in aqueous acid and base solutions for 60 days.
• Direct electrochemical detection of dopamine was achieved with high sensitivity and selectivity over interferents.
• DFT calculations confirmed stronger dopamine binding in ZTF-8 compared to ZIF-8.

Conclusions:

• ZTF-8 is a novel, highly stable zeolitic material with potential for electrochemical sensing.
• The uncoordinated N-heteroatom sites and stability facilitate efficient dopamine oxidation and detection.
• ZTF-8 offers a promising platform for sensitive and selective dopamine detection at neutral pH without post-synthetic modification.