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

Carbocations02:10

Carbocations

Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Introduction to Electrophilic Addition Reactions of Alkenes02:24

Introduction to Electrophilic Addition Reactions of Alkenes

The double bond in a simple, unconjugated alkene is a region of high electron density that can act as a weak base or a nucleophile. The filled π orbital (HOMO) of the double bond can interact with the empty LUMO of an electrophile. A bonding interaction occurs when the electrophile attacks between the two carbons; the electrophile then accepts a pair of electrons from the π bond and undergoes addition across the double bond, yielding a single product.
Addition and elimination reactions can be...
Conjugate Addition (1,4-Addition) vs Direct Addition (1,2-Addition)01:27

Conjugate Addition (1,4-Addition) vs Direct Addition (1,2-Addition)

α,β-Unsaturated carbonyl compounds with two electrophilic sites, the carbonyl carbon, and the β carbon, are susceptible to nucleophilic attack via two modes: conjugate or 1,4-addition and direct or 1,2-addition.
Conjugate addition results in a thermodynamically stable product. The reaction retains the stronger C=O bond at the expense of the weaker C=C π bond. The process is slow as the β carbon is less electrophilic than the carbonyl carbon.
Direct addition products are formed faster owing to...
Valence Bond Theory02:45

Valence Bond Theory

Overview of Valence Bond Theory
Conjugate Addition to α,β-Unsaturated Carbonyl Compounds01:09

Conjugate Addition to α,β-Unsaturated Carbonyl Compounds

α,β-Unsaturated carbonyl compounds are molecules bearing a carbonyl and alkene functionality in conjugation with each other. The conjugation in the molecule leads to three resonance structures. The hybrid form exhibits two probable electrophilic sites: the carbonyl carbon and the β carbon.

You might also read

Related Articles

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

Sort by
Same author

Integrated computational modeling of chalcone-based inhibitors targeting carbonic anhydrase I and II: 3D-QSAR, molecular docking, and dynamics simulations.

Journal of computer-aided molecular design·2026
Same author

Magnetic properties of molecules on surfaces studied with scanning probe methods.

National science review·2026
Same author

Cooperative Rotation and Spin State Switching of Molecules in Artificial Arrays.

The journal of physical chemistry letters·2026
Same author

High Resolution Ultrasound for the Assessment of Melasma: Experience With 1064 nm Q-Switched Nd:YAG Laser.

Cureus·2026
Same author

Magnetic Excitations of Isolated and Interconnected Complexes on a Superconductor.

Nano letters·2025
Same author

Cloning-Free Genome Editing by CRISPR/T7RNAP/Cas9 in Trypanosoma cruzi.

Methods in molecular biology (Clifton, N.J.)·2025
Same journal

Intrinsic Superconducting Gap in Bilayer KCa<sub>2</sub>Fe<sub>4</sub>As<sub>4</sub>F<sub>2</sub> and Decoupled Monolayer FeAs.

Nano letters·2026
Same journal

Programmable Hydrogen-Assisted Chemical Vapor Deposition Growth and Bipolar Transport in Two-Dimensional MoO<sub>2</sub> Nanoflakes.

Nano letters·2026
Same journal

A Curvature-Modulated Strategy for Single-Atom Catalysts toward Reciprocal Regulation in Li-S Batteries.

Nano letters·2026
Same journal

Vacuum Pyrolysis Engineered CoSb/C Scaffold for Sodium Metal Anodes with Sodiophilic and Superionic Interphase.

Nano letters·2026
Same journal

Hexagonal SiGe Quantum Dots in Nanowires.

Nano letters·2026
Same journal

Monolithic Axial InGaAs Quantum Dot Emitters in GaAs-Based Nanowires via Sb-Mediated Facet Engineering.

Nano letters·2026
See all related articles

Related Experiment Video

Updated: May 31, 2026

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

Charge injection through single and double carbon bonds.

Guillaume Schull1, Yannick J Dappe, César González

  • 1Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS- Université de Strasbourg ), 67034 Strasbourg, France. guillaume.schull@ipcms.u-strasbg.fr

Nano Letters
|July 19, 2011
PubMed
Summary
This summary is machine-generated.

Scanning tunneling microscopy revealed how the contact point on C(60) fullerene molecules affects electron transfer efficiency. This finding depends on the specific carbon-carbon bond order contacted by the scanning probe.

More Related Videos

Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source
06:26

Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source

Published on: August 17, 2018

Covalent Labeling with Diethylpyrocarbonate for Studying Protein Higher-Order Structure by Mass Spectrometry
10:36

Covalent Labeling with Diethylpyrocarbonate for Studying Protein Higher-Order Structure by Mass Spectrometry

Published on: June 15, 2021

Related Experiment Videos

Last Updated: May 31, 2026

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source
06:26

Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source

Published on: August 17, 2018

Covalent Labeling with Diethylpyrocarbonate for Studying Protein Higher-Order Structure by Mass Spectrometry
10:36

Covalent Labeling with Diethylpyrocarbonate for Studying Protein Higher-Order Structure by Mass Spectrometry

Published on: June 15, 2021

Area of Science:

  • * Condensed matter physics
  • * Nanotechnology
  • * Surface science

Background:

  • * Understanding charge transport at the single-molecule level is crucial for molecular electronics.
  • * Fullerene molecules, like C(60), are promising building blocks for nanoscale devices due to their unique electronic properties.
  • * The precise atomic arrangement at the interface between a probe and a molecule significantly influences electronic measurements.

Purpose of the Study:

  • * To investigate the relationship between the contact geometry on C(60) molecules and charge injection efficiency.
  • * To determine how the local electronic structure, specifically the carbon-carbon bond order, affects contact conductance.
  • * To correlate experimental measurements with theoretical predictions for charge transport in molecular junctions.

Main Methods:

  • * Employed scanning tunneling microscopy (STM) to probe the contact conductance of individual, oriented C(60) molecules.
  • * Systematically varied the lateral position of the STM tip to make contact with different regions of the fullerene cage.
  • * Utilized first-principles calculations to model the electronic structure and simulate charge injection processes.

Main Results:

  • * Demonstrated that contact conductance varies significantly with the lateral position of the scanning tunneling microscope tip on the C(60) molecule.
  • * Identified a direct correlation between the efficiency of charge injection and the order of the contacted carbon-carbon bond.
  • * Theoretical calculations confirmed the experimental observations, attributing variations to the local electronic density of states.

Conclusions:

  • * The contact point on a C(60) molecule critically influences charge injection efficiency, highlighting the importance of interface control in molecular electronics.
  • * The electronic properties of fullerene molecules are sensitive to the local atomic structure, specifically the bond order at the contact site.
  • * This study provides fundamental insights into charge transport mechanisms at the molecule-surface interface, paving the way for tailored molecular electronic devices.