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

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

1.0K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.0K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.0K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.0K
Molecular Spectroscopy: Absorption and Emission01:14

Molecular Spectroscopy: Absorption and Emission

1.9K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
1.9K
Nuclear Overhauser Enhancement (NOE)01:07

Nuclear Overhauser Enhancement (NOE)

645
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling.  This phenomenon, called the Nuclear Overhauser Enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring...
645

You might also read

Related Articles

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

Sort by
Same author

Spin-Flip Upconversion Luminescence and Tunable Downshifting Near-Infrared Emissions via 4d-4f Interaction in Doped Halide Perovskite.

Angewandte Chemie (International ed. in English)·2026
Same author

Profile of anatomy teachers of students in healthcare professions: a scoping review.

BMC medical education·2026
Same author

A Dysprosium Complex with Two Quasi-Degenerate Easy Axes.

Inorganic chemistry·2025
Same author

Enhanced red-light-driven hydrogen evolution by a diplatinum photocatalyst by the larger wavefunction leakage of iodide coordinated to the platinum center.

Chemical science·2025
Same author

Exploring a New Family of (Phosphinochalcogenoyl)Europocenes for Magneto-Optical Thermometry.

Angewandte Chemie (International ed. in English)·2025
Same author

Diogo Alves Gálico.

Angewandte Chemie (International ed. in English)·2025

Related Experiment Video

Updated: Jun 12, 2025

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

8.4K

Distortion Engineering: A Strategy to Modulate Molecular Upconversion with Molecular Cluster-Aggregates.

Diogo A Gálico1, Alexandros A Kitos1, Rayan Ramdani1

  • 1Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.

Journal of the American Chemical Society
|September 20, 2024
PubMed
Summary

Molecular engineering enhances molecular upconversion in molecular cluster aggregates (MCAs). Doping with cerium (CeIII) ions modifies the upconversion mechanism, improving performance in luminescent applications.

More Related Videos

Triplet Fusion Upconversion Nanocapsule Synthesis
08:36

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

2.4K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

2.3K

Related Experiment Videos

Last Updated: Jun 12, 2025

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

8.4K
Triplet Fusion Upconversion Nanocapsule Synthesis
08:36

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

2.4K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

2.3K

Area of Science:

  • Materials Chemistry
  • Supramolecular Chemistry
  • Photochemistry

Background:

  • Rational molecular engineering is crucial for tuning properties in molecular magnetism and luminescence.
  • Molecular cluster aggregates (MCAs) offer versatility through composition control and engineering.
  • Upconversion processes in MCAs are key for advanced optical applications.

Purpose of the Study:

  • To enhance molecular upconversion in MCAs using combined strategies of composition control and molecular engineering.
  • To investigate the effect of doping {GdErYb} MCAs with CeIII ions on upconversion properties.
  • To explore opto-structural correlations for improved upconverter performance.

Main Methods:

  • Synthesis of {GdErYb} MCAs doped with CeIII ions.
  • Characterization of structural modifications and optical properties.
  • Analysis of CeIII-mediated cross-relaxation and its impact on upconversion.

Main Results:

  • Replacement of GdIII with CeIII ions modified the upconversion mechanism via CeIII-mediated cross-relaxation.
  • Engineered metal site distortion due to CeIII doping relaxed selection rules.
  • Enhanced upconversion quantum yield and improved luminescent thermometry were observed.

Conclusions:

  • Combined molecular engineering and composition control effectively enhance molecular upconversion in MCAs.
  • CeIII doping provides a viable strategy to tune upconversion efficiency and luminescent thermometry.
  • The developed opto-structural correlations offer a pathway for designing next-generation molecular upconverters.