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Glucose selective surface plasmon resonance-based bis-boronic acid sensor.

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Detecting saccharides like d-glucose is challenging. This study uses surface plasmon resonance with self-assembled monolayers to achieve selective d-glucose detection, showing higher affinity than other sugars.

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Area of Science:

  • Carbohydrate chemistry
  • Analytical chemistry
  • Biomolecular sensing

Background:

  • Saccharides are vital in biological processes but difficult to detect.
  • Accurate saccharide detection is crucial for understanding physiological and pathological states.

Purpose of the Study:

  • To develop a selective method for detecting d-glucose.
  • To investigate the use of surface plasmon resonance (SPR) with novel self-assembled monolayers (SAMs) for saccharide sensing.

Main Methods:

  • Fabrication of gold surfaces with SAMs from bis-boronic acid-thioctic acid.
  • Utilizing SPR to monitor the binding of saccharides to the SAMs.
  • Comparing the binding affinity of d-glucose against d-galactose, d-fructose, and d-mannose.

Main Results:

  • The developed SAMs selectively detected d-glucose.
  • SPR demonstrated a significantly higher affinity for d-glucose compared to other tested saccharides.
  • The well-defined intramolecular distance in the bis-boronic acid moiety is key to selectivity.

Conclusions:

  • This SPR-based approach offers a highly selective and sensitive method for d-glucose detection.
  • The novel SAMs provide a promising platform for carbohydrate-based biosensing applications.
  • Further research can explore broader applications in diagnostics and biochemical analysis.