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Engineering Cannabinoid Sensors through Solution-Based Screening of Phthalocyanines.
Zachary J Comeau1,2, Glenn A Facey2, Cory S Harris3
1Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt, Ottawa, Ontario K1N 6N5, Canada.
ACS Applied Materials & Interfaces
|October 30, 2020
Summary
Spectroelectrochemistry rapidly screens phthalocyanine materials for organic thin-film transistor (OTFT) sensors. This method predicts sensor performance for detecting cannabinoids, accelerating material selection and reducing development time.
Area of Science:
- Materials Science
- Analytical Chemistry
- Organic Electronics
Background:
- Organic thin-film transistors (OTFTs) show potential for sensing applications, including detecting small organic molecules like cannabinoids.
- Current fabrication and testing of OTFT sensors are resource-intensive, requiring specialized equipment and expertise.
- Phthalocyanine-based OTFTs are promising sensor candidates, but material optimization is challenging.
Purpose of the Study:
- To investigate spectroelectrochemistry as a rapid screening method for phthalocyanine-based sensor materials.
- To assess molecular interactions between various phthalocyanines and cannabinoids (THC, CBD).
- To correlate spectroelectrochemical data with OTFT performance for predicting sensor efficacy.
Main Methods:
- Spectroelectrochemistry was used to analyze interactions between metal-free and metal phthalocyanines (MPcs) with cannabinoids.
- Cannabinoid-sensitive chromophore (Fast Blue BB) was used in some experiments.
- Spectral changes in the Q band region were analyzed and compared with 2D-NMR data and OTFT performance.
Main Results:
- Spectroelectrochemical analysis revealed molecular interactions between phthalocyanines and cannabinoids.
- Changes in the Q band spectra correlated with OTFT sensor responses.
- The spectroelectrochemical method effectively predicted the performance of OTFTs for cannabinoid sensing.
Conclusions:
- Spectroelectrochemistry offers a rapid and efficient approach to screen potential phthalocyanine materials for OTFT-based small organic molecule sensing.
- This technique can significantly expedite the selection of optimal materials, reducing the burden of traditional sensor development.
- Phthalocyanine spectral changes provide valuable insights for designing effective OTFT sensors.
