Bright green cellulose-based fluorescent probe toward Au³⁺ smartphone technology recognition and its visualization...

Area of Science:

• Materials Science
• Analytical Chemistry
• Environmental Science

Background:

• Gold ions (Au3+) are significant in various industrial applications but require sensitive detection methods.
• Existing detection probes often lack sustainability or possess limitations in sensitivity and selectivity.
• Developing eco-friendly and efficient fluorescent probes is crucial for environmental monitoring and chemical analysis.

Purpose of the Study:

• To design and synthesize a novel, sustainable fluorescent probe (MAC-2) for the detection of Au3+.
• To investigate the structural and optical properties of the synthesized probe.
• To evaluate the probe's sensitivity, selectivity, response time, and potential for practical applications.

Main Methods:

• Synthesis of MAC-2 using cellulose and benzothiazole derivatives.
• Structural characterization via SEM, XRD, FTIR, and 1H NMR.
• Optical property investigation and Au3+ detection experiments.
• Development of a smartphone-based detection system and fluorescent test strips.

Main Results:

• MAC-2 exhibited bright green fluorescence and significant quenching in the presence of Au3+.
• The probe demonstrated high sensitivity with a limit of detection (LOD) as low as 0.057 μM and a rapid response time of 1 minute.
• MAC-2 showed excellent specific recognition and anti-interference capabilities.
• Successful application in smartphone-based detection and fluorescent test strips for convenient Au3+ analysis.

Conclusions:

• Cellulose-based fluorescent probe MAC-2 offers a sustainable, sensitive, and selective method for Au3+ detection.
• The probe's properties and application in portable detection systems provide valuable insights for developing new analytical tools.
• This research promotes advancements in detecting metal ions and biomolecules using eco-friendly fluorescent probes.