Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Structure of Conjugated Dienes

Structure of Conjugated Dienes

Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...

Polymers

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...

Polymers

Polymers

Conjugated Proteins

Conjugated Proteins

Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...

Conjugated Proteins

Conjugated Proteins

Conjugation

Conjugation

Conjugation is a form of horizontal gene transfer that primarily occurs in bacteria and some archaea, promoting genetic diversity and adaptation. Bacteria can acquire resistance genes through conjugative plasmids, allowing them to survive antibiotic treatments that would otherwise be lethal. This process involves direct contact between cells through specialized structures such as the sex pilus and is mediated by conjugative plasmids, including the F (fertility) factor.Conjugation requires...

You might also read

Related Articles

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

Sort by

Same author

Photocatalyzed oxidative cleavage of alkenes using CO<sub>2</sub> as an oxygen donor.

Science (New York, N.Y.)·2026

Same author

Correlated Charge Transport in an Organic Coulomb Glass.

Advanced materials (Deerfield Beach, Fla.)·2026

Same author

A Vibronic Coupling Model to Study the Nonadiabatic Dynamics of Polyenes.

The journal of physical chemistry. A·2026

Same author

Confinement-induced ultrafast conductivity in 2D perovskites resolved by correlative terahertz-NIR spectroscopy.

The Journal of chemical physics·2026

Same author

Temperature-dependence of charge and exciton transport in one-dimensional systems subject to static and dynamic disorder.

The Journal of chemical physics·2026

Same author

Seawater to Sustainable Fuel: Sunlight-Driven Green Hydrogen Generation with an Atomically Dispersed Photocatalyst.

Journal of the American Chemical Society·2025

Same journal

Kinetic and Mechanistic Insights into H-Abstraction and Subsequent Isomerization and Decomposition of Monoglyme and Key Combustion Intermediates.

The journal of physical chemistry. A·2026

Same journal

First-Principles Analysis of Protonation-Induced Electronic Effects in Tetrakis(<i>p</i>-aminophenyl)porphyrin (TAPP).

The journal of physical chemistry. A·2026

Same journal

Exploring the Reactivity of the CH Radical toward Nitrous Oxide in the Context of the Interstellar Medium.

The journal of physical chemistry. A·2026

Same journal

Infrared Photodissociation Spectroscopy of Benzene-V<sup>+</sup>(CO)<sub>n</sub> "Piano Stool" Cations.

The journal of physical chemistry. A·2026

Same journal

Correction to "Solvent-Dependent Ultrafast Photochemical Dynamics of <i>N</i>-Methyl Oxindole Overcrowded Alkene Molecular Motors".

The journal of physical chemistry. A·2026

Same journal

Accelerating the Discovery of Superhalogens via Physics-Informed Graph Neural Networks.

The journal of physical chemistry. A·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 12, 2026

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Published on: January 28, 2016

Structural Information for Conjugated Polymers from Optical Modeling.

Max Marcus^1,2, Jonathan D Milward^1,3, Anna Köhler^4,5

¹Department of Chemistry, Physical & Theoretical Chemistry Laboratory , University of Oxford , Oxford , OX1 3QZ , U.K.

The Journal of Physical Chemistry. A

|March 23, 2018

Summary

This summary is machine-generated.

We simulated optical spectra of a conjugated polymer using a Frenkel-Holstein model. The model accurately reproduced vibronic spectra, suggesting strong electronic coupling along polymer chains is best described in the adiabatic limit.

More Related Videos

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

Published on: January 17, 2018

Related Experiment Videos

Last Updated: Feb 12, 2026

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Published on: January 28, 2016

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

Published on: January 17, 2018

Area of Science:

Computational chemistry
Polymer physics
Spectroscopy

Background:

Ladder-type poly(p-phenylene) derivatives (MeLPPP) are planar conjugated polymers.
These polymers exhibit low interchain interactions, simplifying theoretical modeling.
Understanding their optical spectra is crucial for material applications.

Purpose of the Study:

To simulate the optical spectra of MeLPPP using a theoretical model.
To investigate the role of electronic coupling along the polymer chain.
To determine the appropriate theoretical limit for describing these interactions.

Main Methods:

Utilized a Frenkel-Holstein model.
Modeled uncoupled polymer chains.
Employed the adiabatic limit approximation.
Simulated optical spectra and torsion angles.

Main Results:

The theoretical calculations accurately reproduced the experimental vibronic spectra of MeLPPP.
The model yielded reasonable torsion angles between adjacent phenyl rings.
The simulation successfully captured the polymer's optical properties.

Conclusions:

The Frenkel-Holstein model in the adiabatic limit is effective for simulating MeLPPP optical spectra.
Strong electronic coupling along the polymer chain is well-described by the adiabatic limit.
Interchain coupling is less significant than intrachain coupling for this system's optical properties.