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

Polymers02:34

Polymers

40.6K
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...
40.6K
Polymers02:34

Polymers

23.2K
23.2K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

3.7K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.7K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

3.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
3.8K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

3.2K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
3.2K
Polymers: Defining Molecular Weight01:01

Polymers: Defining Molecular Weight

3.8K
Unlike small molecules with definite molecular weights, polymers are a mixture of individual polymer chains of varying lengths, each with a unique molecular weight.  So, the molecular weight of a polymer is expressed as an average value based on the average size of the polymer chains. The two most common forms of averages used for polymers are the number average molecular weight and weight average molecular weight.
The number average molecular weight (Mn) is the summation of the number...
3.8K

You might also read

Related Articles

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

Sort by
Same author

Tuning the Mechanical Properties of Crosslinked Copolymers via Sequence and Solvent-Selective Swelling for Vat Photopolymerization.

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

Tailoring Molecular Architectures for Intramolecular Charge Separation of the Multiexciton State Generated by Singlet Fission.

Journal of the American Chemical Society·2026
Same author

Tuning Quintet Multiexciton Sublevel Selection via Bridge Resonance in Singlet Fission.

The journal of physical chemistry letters·2026
Same author

Advancing nanomaterials research in the legacy of Louis Brus.

The Journal of chemical physics·2026
Same author

Controlling triplet-pair formation in acene-bridged trimers through locally excited-charge-transfer state mixing.

Chemical science·2026
Same author

Prediction of rheological properties via structure elucidation of solvated hydrogels.

Nature materials·2026
Same journal

Linker Engineering toward NIR-II Metal-Organic Framework with Maximal Emission beyond 1000 nm for Inflammatory Bowel Disease Imaging.

Journal of the American Chemical Society·2026
Same journal

Observing Kinetic Selectivity in Anthracene Photodimerization through Selective Quenching by Excited States of Proximate Rare Earth Cations.

Journal of the American Chemical Society·2026
Same journal

Sequence-Dependent Folding of Recognition-Encoded Melamine Oligomers.

Journal of the American Chemical Society·2026
Same journal

Large Thermo- and Mechanosalient Actuation via Cooperative Twist Elasticity-Induced Packing Motif Conversion.

Journal of the American Chemical Society·2026
Same journal

Discovery and Biosynthesis of Lanthipeptides Featuring an Azepinoindole Scaffold by Radical <i>S</i>-Adenosylmethionine Enzyme-Catalyzed C-C Bond Formation.

Journal of the American Chemical Society·2026
Same journal

Enantiopurity-Controlled Magnetism in a Two-Dimensional Organic-Inorganic Material.

Journal of the American Chemical Society·2026
See all related articles

Related Experiment Video

Updated: Jan 24, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.9K

Persistent Multiexcitons from Polymers with Pendent Pentacenes.

Lauren M Yablon1, Samuel N Sanders1, Hua Li2

  • 1Department of Chemistry , Columbia University , New York , New York 10027 , United States.

Journal of the American Chemical Society
|May 24, 2019
PubMed
Summary
This summary is machine-generated.

This study explores singlet fission in polymer chains, achieving efficient exciton multiplication via through-space interactions. These novel pentacene polymers yield long-lived triplets, outperforming crystalline materials.

More Related Videos

Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials
07:12

Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials

Published on: September 13, 2024

3.0K
High-throughput Screening of Chemical Compounds to Elucidate Their Effects on Bacterial Persistence
07:25

High-throughput Screening of Chemical Compounds to Elucidate Their Effects on Bacterial Persistence

Published on: February 23, 2021

4.5K

Related Experiment Videos

Last Updated: Jan 24, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.9K
Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials
07:12

Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials

Published on: September 13, 2024

3.0K
High-throughput Screening of Chemical Compounds to Elucidate Their Effects on Bacterial Persistence
07:25

High-throughput Screening of Chemical Compounds to Elucidate Their Effects on Bacterial Persistence

Published on: February 23, 2021

4.5K

Area of Science:

  • Organic Photovoltaics
  • Materials Science
  • Photochemistry

Background:

  • Singlet fission (SF) is a crucial exciton multiplication process in organic materials, converting one singlet exciton into two triplet excitons.
  • Traditional SF studies focus on crystalline films or isolated molecular dimers.
  • An intermediate regime involving through-space interactions in polymer chains remains less explored.

Purpose of the Study:

  • To investigate singlet fission and triplet pair recombination in isolated polymer chains with through-space interactions.
  • To explore how appending pentacene chromophores to a polynorbornene backbone influences SF efficiency and triplet dynamics.
  • To determine if these polymer systems can yield free triplets with extended lifetimes.

Main Methods:

  • Synthesis of polymers with pendent pentacene units attached to a polynorbornene backbone.
  • Spectroscopic investigation of photophysical processes, including singlet fission and triplet-triplet annihilation.
  • Analysis of molecular dynamics and their influence on SF and triplet recombination kinetics.
  • Measurement of triplet exciton lifetimes in both solution and thin-film states.

Main Results:

  • Macromolecules with pendent pentacenes exhibit efficient singlet fission mediated by through-space π-π interactions.
  • Triplet-triplet recombination was identified as a geminate process, with recombination rates dependent on polymer molecular weight.
  • The synthesized pendent pentacene polymers demonstrated superior free triplet lifetimes compared to conventional crystalline chromophores.

Conclusions:

  • Pendent pentacene polymers offer a promising platform for harnessing through-space interactions to achieve efficient singlet fission.
  • These polymers provide a viable route to generate long-lived triplet excitons, surpassing the performance of crystalline analogues.
  • The findings open new avenues for designing advanced organic materials for energy conversion applications.