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

4.1K
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...
4.1K
Assembly of Cytoskeletal Filaments01:18

Assembly of Cytoskeletal Filaments

28.0K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
28.0K
Basicity of Heterocyclic Aromatic Amines01:25

Basicity of Heterocyclic Aromatic Amines

7.1K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
7.1K
Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

Five-Membered Heterocyclic Aromatic Compounds: Overview

5.9K
Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
5.9K
Structure of Amines01:19

Structure of Amines

3.4K
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are...
3.4K
Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

4.1K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
4.1K

You might also read

Related Articles

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

Sort by
Same author

Controlled assembly of two-dimensional porphyrin heterostructures toward directed energy transfer and charge separation.

Nature communications·2026
Same author

Recent progress on disorder-induced topological phases.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Fluorinated Ultralong-Acting Neuromuscular Blocking Agent with Improved Activity Profile and Biosafety for the Development of Blockade and Reversal Partner Drugs.

Journal of medicinal chemistry·2026
Same author

Perfluoroalkylated amphiphilic porphyrin nanomicelles for improved photodynamic therapy: anti-tumour efficacy through stability enhancement and O<sub>2</sub> enrichment.

Journal of materials chemistry. B·2026
Same author

Artificial Spherical Chromatophore Mimicking LH2 and LH1-RC for Highly Efficient Photocatalytic Hydrogen Production with Turnover Number >667,000.

Journal of the American Chemical Society·2026
Same author

The relationship between abnormalities in amygdala functional connectivity and emotion regulation difficulties in problematic smartphone users.

BMC psychology·2026

Related Experiment Video

Updated: Mar 1, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

8.3K

Polymeric Tubular Aromatic Amide Helices.

Dan-Wei Zhang1, Hui Wang1, Zhan-Ting Li1

  • 1Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai, 200433, China.

Macromolecular Rapid Communications
|June 2, 2017
PubMed
Summary
This summary is machine-generated.

Conjugated polymers can form dynamic helical structures through non-covalent forces. These unimacromolecular tubular architectures offer unique functions in molecular recognition and ion transport.

Keywords:
foldamerhelixmacromolecular tubesmolecular recognitionpolymers

More Related Videos

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

7.3K
Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

13.5K

Related Experiment Videos

Last Updated: Mar 1, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

8.3K
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

7.3K
Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

13.5K

Area of Science:

  • Polymer Chemistry
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Conjugated polymers are known for their electronic properties.
  • Non-covalent interactions play a crucial role in polymer self-assembly.
  • Helical conformations in polymers can lead to unique structural and functional properties.

Purpose of the Study:

  • To highlight recent advances in the formation and properties of helical conjugated polymers.
  • To explore the driving forces behind polymer helix formation.
  • To discuss the potential applications of these dynamic tubular architectures.

Main Methods:

  • Induction of helical conformations via intra- and/or intermolecular non-covalent forces.
  • Characterization of helices formed by aromatic amide, hydrazide, and urea polymers.
  • Analysis of factors influencing helix cavity and depth, such as degree of polymerization.

Main Results:

  • Aromatic amide, hydrazide, and urea polymers can form well-organized helical structures.
  • Driving forces include intramolecular hydrogen bonding, solvophobicity, and guest induction.
  • The degree of polymerization dictates the cavity and depth of the helices.
  • These helices represent a new class of unimacromolecular dynamic tubular architectures.

Conclusions:

  • Helical conjugated polymers offer a novel platform for dynamic tubular architectures.
  • These structures exhibit potential in molecular recognition, chirality transfer, and ion transport.
  • Further research into these materials could lead to advanced functional applications.