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Related Concept Videos

Cycloalkanes02:28

Cycloalkanes

Cycloalkanes are saturated cyclic hydrocarbons with carbon atoms arranged in the form of rings. They have two fewer hydrogen atoms than the corresponding acyclic alkane; therefore, their general formula is CnH2n. The structural formulas of cycloalkanes are simplified using the line-angle representation. The regular polygons are used to represent the cycloalkane rings, with each side representing a carbon-carbon bond.
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
Stability of Substituted Cyclohexanes02:30

Stability of Substituted Cyclohexanes

This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...

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Related Experiment Video

Updated: May 9, 2026

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes
09:28

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Published on: January 10, 2017

Robust cyclohexanone selective chemiresistors based on single-walled carbon nanotubes.

Kelvin M Frazier1, Timothy M Swager

  • 1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Analytical Chemistry
|July 27, 2013
PubMed
Summary

A new gas sensor using functionalized single-walled carbon nanotubes (SWCNTs) can detect cyclohexanone, a key explosive component. This robust sensor offers fast, selective, and sensitive detection for enhanced safety applications.

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Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Published on: July 22, 2013

Area of Science:

  • Materials Science
  • Chemical Sensors
  • Nanotechnology

Background:

  • Single-walled carbon nanotubes (SWCNTs) offer unique electronic properties for sensor applications.
  • Selective detection of cyclohexanone is crucial for explosive detection and safety.
  • Existing chemiresistors often lack robustness against environmental factors like humidity and heat.

Purpose of the Study:

  • To develop a highly robust and sensitive gas sensor for selective cyclohexanone detection.
  • To investigate the functionalization of SWCNTs for enhanced gas sensing capabilities.
  • To explore the mechanism of cyclohexanone binding and sensor response.

Main Methods:

  • Noncovalent functionalization of SWCNTs using a trifunctional selector via cofacial π-π interactions.
  • Fabrication of SWCNT-based chemiresistors.
  • Gas sensing measurements to evaluate response, selectivity, and robustness to cyclohexanone.

Main Results:

  • The trifunctional selector enabled selective binding of cyclohexanone through hydrogen bonding.
  • SWCNT-based chemiresistors demonstrated reversible and reproducible responses within 30 seconds to 10 ppm cyclohexanone.
  • The sensor exhibited an average theoretical limit of detection (LOD) of 5 ppm for cyclohexanone.

Conclusions:

  • Functionalized SWCNTs provide a robust platform for highly sensitive and selective cyclohexanone detection.
  • The trifunctional selector enhances sensor performance and stability against humidity and heat.
  • This technology holds promise for advanced explosive detection systems.