Rationally introduce multi-competitive binding interactions in supramolecular gels: a simple and efficient approach...

Area of Science:

• Supramolecular chemistry
• Chemical sensing
• Materials science

Background:

• Sensor arrays are crucial for multianalyte detection but often require complex synthesis of multiple receptors.
• Developing efficient and simple sensor arrays remains a significant challenge in analytical chemistry.

Purpose of the Study:

• To develop a facile method for fabricating a simple sensor array based on competitive binding in supramolecular gels.
• To create a sensor array utilizing a single synthesized receptor for multianalyte ion detection.

Main Methods:

• Fabrication of a supramolecular gel using a naphthylhydrazone-based organogelator.
• Incorporation of competitive binding interactions into the supramolecular gel to form a sensor array.
• Testing the sensor array's ability to detect various ions in aqueous solutions.

Main Results:

• A 22-member sensor array based on supramolecular gels was successfully created.
• The sensor array accurately identified 14 different ions (including F-, Cl-, Al3+, and Pb2+) in water.
• The array requires only one synthesized receptor, significantly reducing synthetic effort.
• Ion-responsive fluorescent supramolecular materials were also developed, suitable for security applications.

Conclusions:

• This work presents a novel and efficient method for designing simple sensor arrays using supramolecular gels.
• The developed approach simplifies the fabrication process and reduces the number of receptors needed.
• The resulting materials show potential for both ion detection and security display applications.