Antioxidant-substituted tetrapyrazinoporphyrazine as a fluorescent sensor for basic anions

Area of Science:

• Supramolecular chemistry
• Analytical chemistry
• Organic chemistry

Background:

• Antioxidant-substituted tetrapyrazinoporphyrazine derivatives are investigated for sensing applications.
• Fluoride anion detection remains a significant challenge in analytical chemistry.

Purpose of the Study:

• To develop a novel fluorescent sensor for the detection of fluoride anions.
• To elucidate the sensing mechanism of the tetrapyrazinoporphyrazine derivative.

Main Methods:

• Synthesis of tetrapyrazinoporphyrazine substituted with antioxidant 3,5-di-t-butyl-4-hydroxyphenyl groups.
• Investigation of the fluorescent properties of the synthesized compound in the presence of various anions.
• Comparative analysis with the precursor antioxidant-substituted 1,2-phthalonitrile.

Main Results:

• The tetrapyrazinoporphyrazine derivative exhibited a 'turn-on' fluorescence response to fluoride anions.
• The precursor 1,2-phthalonitrile showed a 'turn-off' fluorescence response.
• The phenolate-substituted 1,4-pyrazinyl moiety was identified as the origin of the observed fluorescence phenomenon.

Conclusions:

• The developed tetrapyrazinoporphyrazine derivative is a highly effective 'turn-on' fluorescent sensor for fluoride anions.
• The sensing mechanism involves the phenolate-substituted pyrazinyl moiety, offering insights into sensor design.
• This study provides a new platform for developing selective and sensitive fluorescent probes for anion detection.