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Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
Published on: August 19, 2013
A novel fluorescent vesicular sensor for saccharides based on boronic acid-diol interaction
Yujian Zhang1, Zhenfeng He, Guowen Li
1State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun, Jilin Province 130012, China.
Talanta
|March 2, 2010
Summary
A novel naphthalene-boronic acid amphiphile forms fluorescent vesicles. These vesicles show decreased fluorescence upon binding with saccharides, enabling potential use as a continuous monitoring sensor.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Analytical Chemistry
Background:
- Development of novel amphiphiles for sensing applications.
- Utilizing fluorescence properties of naphthalene derivatives.
- Investigating carbohydrate-responsive materials.
Purpose of the Study:
- Synthesize and characterize a novel naphthalene-boronic acid amphiphile (HNBA).
- Investigate the formation and properties of HNBA-based vesicles.
- Evaluate the fluorescence response of HNBA vesicles to saccharides for sensing applications.
Main Methods:
- Synthesis of 2-(hexadecyloxy)-naphthalene-6-boronic acid (HNBA).
- Scanning electron microscopy (SEM) for vesicle morphology.
- Differential scanning calorimetry (DSC) for phase transitions.
- Fluorescence spectroscopy to study saccharide binding.
Main Results:
- HNBA successfully formed bilayer vesicles in ethanol/water solutions.
- A crystal-to-liquid crystal transition was observed at 63.36°C via DSC.
- Vesicular fluorescence intensity at 348 nm decreased with increasing saccharide concentration.
- Saccharide binding affinity followed the order: fructose > galactose > maltose > glucose.
- Spectral changes were observed in response to urine samples.
Conclusions:
- HNBA vesicles exhibit sensitive fluorescence quenching upon saccharide binding.
- The observed spectral changes suggest potential for HNBA vesicles as carbohydrate sensors.
- HNBA vesicles may be applicable for continuous monitoring and implantable fluorescence sensing, including in biological samples like urine.
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