Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

1.7K
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.7K
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

1.3K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.3K
Molecules and Compounds02:38

Molecules and Compounds

68.7K
Atoms and Molecules
68.7K
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.8K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.8K
Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

401
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
401
Genetic Material01:20

Genetic Material

3.7K
Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.
3.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Diffusion and Adsorption of 2‑Methylpentane and 3‑Methylpentane in MFI-Type Zeolite Crystals.

The journal of physical chemistry. C, Nanomaterials and interfaces·2026
Same author

Diffusion anomaly in nanopores as a rich field for theorists and a challenge for experimentalists.

Nature communications·2024
Same author

Precise control over gas-transporting channels in zeolitic imidazolate framework glasses.

Nature materials·2023
Same author

Hydrocarbon Sorption in Flexible MOFs-Part II: Understanding Adsorption Kinetics.

Nanomaterials (Basel, Switzerland)·2023
Same author

From computer design to gas separation.

Nature materials·2020
Same author

Metal-Organic Framework Co-MOF-74-Based Host-Guest Composites for Resistive Gas Sensing.

ACS applied materials & interfaces·2019

Related Experiment Video

Updated: Feb 3, 2026

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies
13:02

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies

Published on: July 15, 2013

11.9K

NMR diffusometry with guest molecules in nanoporous materials.

Seungtaik Hwang1, Jörg Kärger1

  • 1Faculty of Physics and Earth Sciences, Leipzig University, Leipzig, Germany.

Magnetic Resonance Imaging
|October 17, 2018
PubMed
Summary

Pulsed field gradient NMR reveals new details about how molecules move in nanoporous materials. This technique helps understand transport enhancements and resistances within complex pore structures.

More Related Videos

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.6K
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

6.8K

Related Experiment Videos

Last Updated: Feb 3, 2026

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies
13:02

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies

Published on: July 15, 2013

11.9K
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.6K
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

6.8K

Area of Science:

  • Materials Science
  • Physical Chemistry
  • Chemical Engineering

Background:

  • Understanding molecular diffusion in nanoporous materials is crucial for various applications.
  • Traditional methods often struggle to differentiate complex mass transfer mechanisms.
  • Nanoporous materials exhibit intricate structures affecting transport properties.

Purpose of the Study:

  • To review the application of pulsed field gradient (PFG) NMR in studying molecular diffusion.
  • To highlight how PFG NMR provides novel insights into mass transfer in nanoporous systems.
  • To discuss the ability of PFG NMR to distinguish between different transport mechanisms.

Main Methods:

  • Application of pulsed field gradient (PFG) Nuclear Magnetic Resonance (NMR) spectroscopy.
  • Analysis of molecular diffusion in beds of nanoporous materials.
  • Characterization of mass transfer phenomena.

Main Results:

  • PFG NMR offers significant insights into molecular diffusion in nanoporous materials.
  • The technique effectively discriminates between various mass transfer mechanisms.
  • Sensitivity to transport enhancement in pore hierarchies and resistances on crystal surfaces/interiors was demonstrated.

Conclusions:

  • PFG NMR is a powerful tool for advancing the understanding of molecular diffusion in nanoporous media.
  • It provides a detailed view of transport phenomena beyond simple diffusion.
  • This technique enables the study of complex transport behaviors in materials science and chemical engineering.