Related Experiment Video
Updated: Jun 4, 2026
07:13
Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
Published on: November 15, 2016
Electronic Transport in Porous Nanocrystals Enables Ultrasensitive Consistent Detection of Sulfur Dioxide under
Elissa O Shehayeb1, Joseph Y M Chan1, Giovanni Barcaro2
1Department of Chemistry, Burke Laboratory, Dartmouth College, Hanover, New Hampshire 03755, United States.
Journal of the American Chemical Society
|June 2, 2026
Summary
A novel metal-organic framework, DC-103, offers highly sensitive and stable detection of sulfur dioxide (SO2) gas. This robust sensor performs reliably across various humidity levels, crucial for environmental monitoring.
Area of Science:
- Materials Science
- Environmental Science
- Chemical Sensing
Background:
- Growing release of gaseous pollutants like sulfur dioxide (SO2) necessitates advanced monitoring.
- Existing conductive materials face challenges in sensitivity, selectivity, and stability, especially under fluctuating humidity.
Purpose of the Study:
- To develop a highly crystalline, conductive metal-organic framework (MOF) for reliable SO2 detection.
- To achieve high sensitivity, selectivity, and humidity resistance in a chemiresistive sensor.
Main Methods:
- Synthesis of a tetrapyrazinoporphyrazine (TPz)-based MOF (DC-103) with cobalt and copper components.
- Evaluation of DC-103's chemiresistive response to SO2 under varying humidity conditions.
- Spectroscopic and computational analyses to understand material-analyte interactions.
Main Results:
- DC-103 demonstrated rapid, robust, and humidity-resistant chemiresistive responses to SO2.
- Achieved a low limit of detection of 2.2 parts-per-billion (ppb) in air.
- Maintained consistent and reversible responses across 0-98% relative humidity, with excellent reusability.
Conclusions:
- DC-103 represents a superior MOF-based sensor for SO2 detection compared to existing technologies.
- The sensor shows significant potential for occupational safety and environmental monitoring due to its performance in diverse atmospheric conditions.
