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

Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

69.1K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
69.1K
Aldehydes and Ketones with Water: Hydrate Formation01:20

Aldehydes and Ketones with Water: Hydrate Formation

5.2K
An oxygen-based nucleophile, like water, can undergo addition reactions with aldehydes and ketones. The reaction leads to the formation of hydrates, also referred to as 1,1-diols or geminal diols.
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
5.2K
Inductive Effects on Chemical Shift: Overview01:27

Inductive Effects on Chemical Shift: Overview

2.5K
The protons in unsubstituted alkanes are strongly shielded with chemical shifts below 1.8 ppm. Methine, methylene, and methyl protons appear at approximately 1.7, 1.2 and 0.7 ppm, while the proton signal from methane appears at 0.23 ppm. An electronegative substituent, such as chlorine, withdraws the electron density from the protons, increasing their chemical shift. Progressive substitution of the hydrogens in methane by chlorine shifts the proton signals increasingly downfield, to 3.05 ppm in...
2.5K

You might also read

Related Articles

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

Sort by
Same author

Topotactic ion exchange in β-pyrochlore oxide using 18-crown-6: structural incorporation of confined water in (H<sub>3</sub>O)Os<sub>2</sub>O<sub>6</sub>.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

The importance of sub-nanosecond relaxations on the ballistic impact resistance of cross-linked thermoset network polymers.

Soft matter·2026
Same author

Na<b><sup>+</sup></b> Solvation and Association in Na(SO<sub>3</sub>CF<sub>3</sub>)-Dimethoxyethane Electrolytes by Large-Angle X-Ray Scattering and DFT Calculations.

The journal of physical chemistry. B·2026
Same author

Probing anharmonic and heterogeneous carrier dynamics across sublattice melting in a minimal model superionic conductor.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Redox-Neutral Interstitial Hydride Incorporation in Ruddlesden-Popper Oxides.

Inorganic chemistry·2026
Same author

Synchrotron x-ray diffraction study of liquid and glassy toluene.

The Journal of chemical physics·2026

Related Experiment Video

Updated: Mar 18, 2026

Methane Hydrate Crystallization on Sessile Water Droplets
08:46

Methane Hydrate Crystallization on Sessile Water Droplets

Published on: May 26, 2021

2.9K

Structural and dynamic studies on vapor-deposited amorphous methane hydrate.

Menghan Zhang1, Hiroshi Akiba1, Iwao Matsuda1

  • 1Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.

The Journal of Chemical Physics
|March 16, 2026
PubMed
Summary

Amorphous methane hydrate (a-MH) exhibits hindered methane molecule rotation. Annealing improves cage structure and allows more spherical methane rotation, approaching structure I hydrate properties.

More Related Videos

Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample
09:46

Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample

Published on: March 21, 2016

9.3K
A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
08:01

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

Published on: August 18, 2022

3.6K

Related Experiment Videos

Last Updated: Mar 18, 2026

Methane Hydrate Crystallization on Sessile Water Droplets
08:46

Methane Hydrate Crystallization on Sessile Water Droplets

Published on: May 26, 2021

2.9K
Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample
09:46

Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample

Published on: March 21, 2016

9.3K
A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
08:01

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

Published on: August 18, 2022

3.6K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Chemistry

Background:

  • Methane hydrate is a potential energy resource.
  • Understanding methane molecule rotations in hydrates is crucial.
  • Amorphous methane hydrate (a-MH) presents unique structural and dynamic properties.

Purpose of the Study:

  • Investigate the local amorphous structure of a-MH.
  • Analyze the dynamics of guest methane molecules within the hydrate cages.
  • Determine the effects of annealing on a-MH structure and methane dynamics.

Main Methods:

  • Low-temperature vapor deposition at 7 K to form a-MH.
  • X-ray and neutron diffraction for structural analysis.
  • Quasi-elastic neutron scattering and adiabatic calorimetry for dynamic studies.

Main Results:

  • As-deposited a-MH shows disordered, distorted cages with hindered methane rotation.
  • Annealing at 120 K induces local hydrogen-bond ordering and more defined cages.
  • Methane molecule rotation becomes more spherical after annealing, resembling structure I hydrate.

Conclusions:

  • Annealing transforms the amorphous structure towards ordered cages, influencing guest molecule dynamics.
  • The rotational potential barrier for methane molecules is higher in as-deposited a-MH.
  • a-MH can be controllably modified to approach crystalline hydrate characteristics.