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Structural Isomerism

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Related Experiment Video

Updated: Apr 20, 2026

A Polyaniline-based Sensor of Nucleic Acids

A Polyaniline-based Sensor of Nucleic Acids

Published on: November 1, 2016

Highly selective and sensitive trimethylamine gas sensor based on cobalt imidazolate framework material.

Er-Xia Chen¹, Hong-Ru Fu, Rui Lin

¹State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.

ACS Applied Materials & Interfaces

|November 25, 2014

Summary

This summary is machine-generated.

A novel cobalt imidazolate framework material ([Co(im)2]n) functions as a highly selective trimethylamine (TMA) gas sensor. This advancement offers a promising method for detecting fish and seafood freshness.

Keywords:

cobalt imidazolate framework gas sensor selectivity trimethylamine

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Area of Science:

Materials Science
Chemical Sensing
Analytical Chemistry

Background:

Trimethylamine (TMA) is a key indicator of fish and seafood spoilage.
Developing selective and sensitive sensors for TMA is crucial for food quality monitoring.
Cobalt-based metal-organic frameworks show potential for gas sensing applications.

Purpose of the Study:

To develop and evaluate a [Co(im)2]n-based gas sensor for trimethylamine (TMA) detection.
To assess the sensor's selectivity, response, and detection limits for TMA.
To explore the potential application of the sensor in monitoring food freshness.

Main Methods:

Fabrication of a [Co(im)2]n gas sensor using Ag-Pd interdigitated electrodes.
Gas sensing measurements were conducted at 75 °C.
Analysis of sensor performance, including selectivity, response, and detection limit.

Main Results:

The [Co(im)2]n sensor demonstrated excellent selectivity towards TMA.
A high gas response and a low detection limit of 2 ppm for TMA were achieved.
The sensor exhibited good performance at 75 °C.

Conclusions:

The [Co(im)2]n material is a promising candidate for a TMA gas sensor.
The sensor's performance is attributed to weak interactions between TMA and the [Co(im)2]n framework.
This sensor technology holds potential for practical applications in assessing fish and seafood freshness.