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

Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

3.6K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
3.6K
Valence Bond Theory02:42

Valence Bond Theory

10.9K
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...
10.9K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.9K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.9K
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.5K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.5K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.4K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.4K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.3K
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,...
1.3K

You might also read

Related Articles

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

Sort by
Same author

Translocation of Ti<sub>2</sub>CO<sub>2</sub> MXene monolayer through the cell membranes.

RSC advances·2024
Same author

Ultrafast switching in spin field-effect transistors based on borophene nanoribbons.

Physical chemistry chemical physics : PCCP·2024
Same author

Transition metal dichalcogenide coated gold nanoshells for highly effective photothermal therapy.

Physical chemistry chemical physics : PCCP·2023
Same author

Graphene coated gold nanoparticles: an emerging class of nanoagents for photothermal therapy applications.

Physical chemistry chemical physics : PCCP·2019

Related Experiment Video

Updated: Dec 25, 2025

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

11.9K

Topological spintronics in a polyacetylene molecule device.

M Ali M Keshtan1, Mahdi Esmaeilzadeh1

  • 1Department of physics, Iran University of Science and Technology, Narmak, Tehran 16844, Iran.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 27, 2020
PubMed
Summary
This summary is machine-generated.

This study reveals that trans polyacetylene molecules with specific bonding and an even monomer count exhibit topological properties. These molecules can function as perfect spin filters, with spin polarization controllable by electric fields.

Keywords:
Green’s function methodspintronicstopological materialstrans polyacetylene

More Related Videos

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.3K
Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

8.3K

Related Experiment Videos

Last Updated: Dec 25, 2025

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

11.9K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.3K
Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

8.3K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Chemistry

Background:

  • Topological properties in materials are crucial for advanced electronic applications.
  • Understanding spin-dependent electron transport is key to developing spintronic devices.
  • Polyacetylene molecules offer a tunable platform for exploring quantum phenomena.

Purpose of the Study:

  • To investigate the topological and spin-dependent electron transport properties of trans polyacetylene molecules.
  • To explore the influence of external fields on these properties.
  • To assess the potential of these molecules as spin filters.

Main Methods:

  • Utilizing the Su-Schrieffer-Heeger Hamiltonian.
  • Employing the Green's function method within the Landauer-Büttiker formalism.
  • Applying perpendicular exchange magnetic fields and perpendicular/transverse electric fields.

Main Results:

  • Identified topological properties in trans polyacetylene molecules with intracell single carbon-carbon bonding and an even number of monomers.
  • Demonstrated that these molecules possess edge states despite lacking chiral symmetry.
  • Showcased the induction and manipulation of spin polarization using magnetic and electric fields.
  • Confirmed the potential for creating a perfect spin filter device.

Conclusions:

  • Trans polyacetylene molecules with specific structural characteristics exhibit non-trivial topological properties.
  • External magnetic and electric fields effectively control spin polarization, enabling perfect spin filtering.
  • The developed system offers robust spin manipulation, paving the way for novel spintronic devices.