Room temperature synthesis and binding studies of solution-processable histamine-imprinted microspheres

Area of Science:

• Materials Science
• Analytical Chemistry
• Polymer Chemistry

Background:

• Accurate histamine quantification is crucial for food quality control and diagnosing medical conditions.
• Histamine detection methods require sensitive and selective recognition elements.
• Developing novel materials for histamine sensing remains an active area of research.

Purpose of the Study:

• To synthesize solution-processable histamine-imprinted microspheres using a room-temperature photochemical polymerization technique.
• To evaluate the binding capacity and selectivity of these imprinted polymers for histamine.
• To demonstrate the potential of these materials as recognition elements for optical-based histamine sensing.

Main Methods:

• Histamine-imprinted microspheres were synthesized via free radical photochemical polymerization at 30°C.
• Ethylene glycol dimethacrylate (EGDMA) was used as the crosslinker and methacrylic acid (MAA) as the monomer.
• Binding performance was analyzed using frontal analysis capillary electrophoresis (FACE) and Freundlich isotherm, with competitive binding studies against structural analogs.

Main Results:

• The study successfully synthesized processable histamine-imprinted microspheres.
• Higher selective binding capacity for histamine was observed in polymers with 80 wt% crosslinker (PCP-80) compared to 90 wt% (PCP-90).
• PCP-80 demonstrated superior selectivity for histamine over structural analogs compared to conventional thermal polymers (CTP-80).

Conclusions:

• Room-temperature photochemical polymerization is an effective method for readily obtaining histamine-selective imprinted polymers.
• The synthesized microspheres exhibit excellent selectivity and binding capacity for histamine.
• These materials hold significant potential for use as recognition elements in optical-based histamine sensing applications.