A tetraphenylethylene-based acylhydrazone gel for selective luminescence sensing

Area of Science:

• Supramolecular chemistry
• Materials science
• Analytical chemistry

Background:

• Dynamic covalent chemistry offers reversible bonding for self-assembly.
• Acylhydrazone bonds are dynamic covalent linkages suitable for constructing responsive materials.
• Aggregation-induced emission (AIE) is a photophysical phenomenon useful for sensitive detection.

Purpose of the Study:

• To develop a supramolecular gel based on dynamic covalent acylhydrazone bonds.
• To investigate the potential of this gel for selective ion detection.
• To explore the aggregation-induced emission properties for sensing applications.

Main Methods:

• Synthesis of a supramolecular gel using small molecules and acylhydrazone bonding.
• Characterization of the gel's self-assembly and properties.
• Spectroscopic analysis for selective detection of Cu²⁺ and CN^- ions.

Main Results:

• Successful assembly of a supramolecular gel via dynamic covalent acylhydrazone bonds.
• The gel exhibits aggregation-induced emission (AIE) properties.
• Selective and sensitive detection of Cu²⁺ ions followed by CN^- ions was achieved.

Conclusions:

• The developed supramolecular gel is effective for detecting Cu²⁺ and CN^- ions.
• The AIE property is crucial for the sensitive and selective sensing mechanism.
• This work presents a new platform for developing advanced chemosensors.