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Dual-Mode Photonic Sensor Array for Detecting and Discriminating Hydrazine and Aliphatic Amines
Taihong Liu1, Lüjie Yang1, Wan Feng1
1Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
ACS Applied Materials & Interfaces
|February 8, 2020
Summary
New colorimetric sensors detect hazardous chemicals like hydrazine and amines using oligothiophene derivatives. This dual-mode sensor array offers visual detection and smartphone compatibility for real-time analysis.
Area of Science:
- Materials Science
- Analytical Chemistry
- Organic Chemistry
Background:
- Colorimetric chemosensors offer a simple and cost-effective method for detecting hazardous substances.
- Oligothiophene derivatives with push-pull electronic properties are promising for sensing applications.
Purpose of the Study:
- To design and investigate novel dicyanovinyl-substituted oligothiophene derivatives for sensing applications.
- To develop a dual-mode (colorimetric and fluorescent) sensor array for detecting aliphatic amines and hydrazine.
- To explore the potential of these sensors in real-time, visual detection of hazardous chemicals.
Main Methods:
- Synthesis and photophysical characterization of push-pull dicyanovinyl-substituted oligothiophene derivatives.
- Development of a sensor array using a dicyanovinyl-substituted oligothiophene derivative (NA-3T-CN) and a zinc porphyrin derivative (Zn-TPP).
- Dual-mode detection (colorimetric and fluorescent) and smartphone-enabled readout system for analyte quantification and discrimination.
Main Results:
- One derivative (NA-3T-CN) combined with Zn-TPP formed a sensor array for dual-mode detection of aliphatic amines and hydrazine.
- The sensor array demonstrated satisfactory optical response correlation with analyte concentration.
- A detection limit of 1.22 × 10⁻⁵ mol/L for hydrazine was achieved using fluorescence changes.
- TLC-supported sensor arrays allowed naked-eye detection of hydrazine down to 0.5 wt %.
- Smartphone-based RGB analysis provided satisfactory discrimination among hydrazine, aliphatic amines, and aromatic amines.
Conclusions:
- Push-pull oligothiophene derivatives serve as valuable models for understanding structure-property relationships.
- The developed sensor array shows significant potential for real-time, visual, and cost-effective detection of hazardous chemicals.
- This work highlights the versatility of oligothiophene-based materials in advanced sensing technologies.
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