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

NMR Spectroscopy: Chemical Shift Overview01:15

NMR Spectroscopy: Chemical Shift Overview

The position of the absorption signal of a sample is reported relative to the position of the signal of tetramethylsilane (TMS), which is added as an internal reference while recording spectra. The difference between the absorption frequencies of the sample and TMS (in Hz) is divided by the spectrometer operating frequency (in MHz) to obtain a dimensionless quantity called the chemical shift. It is reported on the δ (delta) scale and expressed in parts per million.
For instance, the proton...
Chemical Shift: Internal References and Solvent Effects01:17

Chemical Shift: Internal References and Solvent Effects

In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
Inductive Effects on Chemical Shift: Overview01:27

Inductive Effects on Chemical Shift: Overview

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...

You might also read

Related Articles

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

Sort by
Same author

Icing in the Cake: Water in Nanoscopic Confinement by Cellulose.

The journal of physical chemistry. B·2025
Same author

Controlled green heterogenous functionalization of cellulose via strategic reaction system design.

Carbohydrate polymers·2025
Same author

Decoupling rheology from particle concentration by charge modulation: Aqueous graphene-clay dispersions.

Journal of colloid and interface science·2023
Same author

Fully Bio-Based Ionic Liquids for Green Chemical Modification of Cellulose in the Activated-State.

ChemSusChem·2023
Same author

Fast Depolymerization of PET Bottle Mediated by Microwave Pre-Treatment and An Engineered PETase.

ChemSusChem·2023
Same author

Fast Depolymerization of PET Bottle Mediated by Microwave Pre-Treatment and An Engineered PETase.

ChemSusChem·2023

Related Experiment Video

Updated: May 16, 2026

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue
07:48

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue

Published on: September 30, 2022

Constant-time chemical-shift selective imaging.

Marianne Giesecke1, Sergey V Dvinskikh, István Furó

  • 1Division of Applied Physical Chemistry, Industrial NMR Centre, Department of Chemistry, KTH Royal Institute of Technology, Stockholm, Sweden.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|December 4, 2012
PubMed
Summary

We show that chemical-shift-selective constant-time imaging (CTI) is achievable by adding selective saturation to existing imaging sequences. This method was validated using lithium-7 CTI imaging in a battery model.

More Related Videos

Pure Shift Nuclear Magnetic Resonance: a New Tool for Plant Metabolomics
13:16

Pure Shift Nuclear Magnetic Resonance: a New Tool for Plant Metabolomics

Published on: July 31, 2021

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy (ATOM)
07:19

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy (ATOM)

Published on: June 28, 2017

Related Experiment Videos

Last Updated: May 16, 2026

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue
07:48

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue

Published on: September 30, 2022

Pure Shift Nuclear Magnetic Resonance: a New Tool for Plant Metabolomics
13:16

Pure Shift Nuclear Magnetic Resonance: a New Tool for Plant Metabolomics

Published on: July 31, 2021

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy (ATOM)
07:19

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy (ATOM)

Published on: June 28, 2017

Area of Science:

  • Magnetic Resonance Imaging
  • Electrochemistry
  • Materials Science

Background:

  • Chemical-shift-selective imaging provides valuable information about material composition.
  • Constant-time imaging (CTI) techniques are crucial for quantitative MRI.
  • Current methods for CTI may be complex or limited in application.

Purpose of the Study:

  • To introduce a simplified approach for chemical-shift-selective constant-time imaging (CTI).
  • To demonstrate the efficacy of the proposed CTI method in a relevant electrochemical system.

Main Methods:

  • Implementation of selective saturation within a standard imaging pulse sequence.
  • Application of the modified sequence for lithium-7 (7Li) CTI.
  • Testing in a battery model comprising Li metal electrodes and Li salt electrolyte.

Main Results:

  • Successful demonstration of chemical-shift-selective CTI by incorporating selective saturation.
  • Acquisition of 7Li CTI images in a complex battery model.
  • Validation of the method's performance in a system with Li metal and dissolved Li salt.

Conclusions:

  • Selective saturation is an effective and simple way to achieve chemical-shift-selective CTI.
  • The proposed method is suitable for studying lithium-ion battery components.
  • This technique advances quantitative MRI for electrochemical applications.