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

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.9K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.9K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.6K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.6K
Valence Bond Theory02:42

Valence Bond Theory

11.7K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.7K
Valence Bond Theory02:45

Valence Bond Theory

51.5K
Overview of Valence Bond Theory
51.5K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.6K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.6K
Colors and Magnetism03:02

Colors and Magnetism

14.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.6K

You might also read

Related Articles

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

Sort by
Same author

A transendocardial delivery and intracardiac ultrasound irradiation treatment catheter.

Drug delivery·2013
Same author

The MDS-UPDRS Part II (motor experiences of daily living) resulted useful for assessment of disability in Parkinson's disease.

Parkinsonism & related disorders·2013
Same author

C3orf58, a novel paracrine protein, stimulates cardiomyocyte cell-cycle progression through the PI3K-AKT-CDK7 pathway.

Circulation research·2013
Same author

Morphological weighted penalized least squares for background correction.

The Analyst·2013
Same author

[Management of Kasabach-Merritt syndrome by drug therapy and surgery].

Zhonghua zheng xing wai ke za zhi = Zhonghua zhengxing waike zazhi = Chinese journal of plastic surgery·2013
Same author

Chemical constituents of fine particulate air pollution and pulmonary function in healthy adults: the Healthy Volunteer Natural Relocation study.

Journal of hazardous materials·2013

Related Experiment Video

Updated: Mar 29, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

6.2K

Coherent transport through spin-crossover magnet Fe2 complexes.

Jing Huang1, Rong Xie2, Weiyi Wang3

  • 1School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China. jhuang@ustc.edu.cn and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China. liqun@ustc.edu.cn.

Nanoscale
|December 10, 2015
PubMed
Summary

Spin crossover (SCO) Fe2 complexes exhibit two-step spin transitions. The [HS-HS] configuration shows potential for molecular spintronics with spin-filtering and negative differential resistance effects.

More Related Videos

Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

10.2K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

Related Experiment Videos

Last Updated: Mar 29, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

6.2K
Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

10.2K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

Area of Science:

  • Molecular spintronics
  • Quantum chemistry
  • Materials science

Background:

  • Spin crossover (SCO) complexes are promising for molecular spintronics due to their magnetic bistability.
  • SCO complexes switch between high-spin (HS) and low-spin (LS) states.

Purpose of the Study:

  • Investigate electronic structures and transport properties of SCO Fe2 complexes.
  • Explore three spin-pair configurations: [LS-LS], [LS-HS], and [HS-HS].
  • Confirm theoretical models and experimental observations of spin transitions.

Main Methods:

  • Density functional theory (DFT) calculations.
  • Non-equilibrium Green's function (NEGF) technique.
  • Analysis of electronic structures and transport properties.

Main Results:

  • SCO Fe2 complexes exhibit two-step spin transitions triggered by external stimuli.
  • The [HS-HS] configuration displays a near-perfect spin-filtering effect.
  • Negative differential resistance (NDR) behavior is observed in the [HS-HS] configuration.
  • Spin-down electrons dominate current in [HS-HS] configuration.

Conclusions:

  • SCO Fe2 complexes demonstrate potential for molecular spintronic devices.
  • The observed spin-filtering and NDR effects highlight their utility.
  • Theoretical findings align with previous models and experiments.