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

UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.

You might also read

Related Articles

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

Sort by
Same author

Multicomponent Micelles with Boosted Stability of Iminoboronates.

Biomacromolecules·2026
Same author

Polyphenol-based nanoparticles enhancing doxycycline efficacy for acne therapy.

Journal of materials chemistry. B·2026
Same author

Bioadhesive polydopamine-vitamin A derivative hydrogels reprogram the wound microenvironment for scarless wound healing and hair follicle regeneration.

Materials horizons·2026
Same author

A Degradable Macromolecular Antioxidant for Efficient Arthritis Treatment.

Biomacromolecules·2025
Same author

An Orthogonally Functionalizable Tetrazine Building Block for Dual-Conjugated Bioorthogonal Probes.

Organic letters·2025
Same author

Disulfide-Functionalized Covalent Organic Frameworks as Nanocarriers Realizing Programmed Cellular Internalization and Drug Release.

ACS applied materials & interfaces·2025
Same journal

Polymer fatigue: mechanism, mechanics and design.

Materials horizons·2026
Same journal

Bioinspired ultra-fast dissolving core-sheath beaded-structured nanofibrous membranes <i>via</i> one-step emulsion electrospinning for skin moisturization.

Materials horizons·2026
Same journal

A synergistic bio-electro-topological strategy based on an MXene/silk fibroin hydrogel and electrical stimulation for diabetic wound healing.

Materials horizons·2026
Same journal

Relativistic spin-momentum locking in ferromagnets.

Materials horizons·2026
Same journal

Monolithic additive manufacturing of a fluid-structure coupled architected cellular mechanical system for rate-adaptive enhanced energy dissipation.

Materials horizons·2026
Same journal

Decoupling parameters of adhesion from viscoelasticity in the human perception of stickiness <i>via</i> shear-stiffening elastomers.

Materials horizons·2026
See all related articles

Related Experiment Video

Updated: May 7, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

12.6K

UV absorption enhanced polydopamine coating.

Zhen Yang1, Huijie Liu2, Junyi Zhao3

  • 1Department of Radiology, Huaxi MR Research Center, Functional and Molecular Imaging Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, China. haoxingwu@scu.edu.cn.

Materials Horizons
|March 5, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to improve UV protection in polydopamine (PDA) coatings. By adding thiol-heterocycle derivatives, these coatings offer better UV absorption and visible light transparency for diverse applications.

More Related Videos

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

9.9K
Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles
07:58

Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles

Published on: November 14, 2018

8.2K

Related Experiment Videos

Last Updated: May 7, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

12.6K
A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

9.9K
Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles
07:58

Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles

Published on: November 14, 2018

8.2K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Mussel-inspired polydopamine (PDA) coatings are versatile materials with applications in biomedicine, energy, detection, and UV protection.
  • PDA coatings exhibit promising UV-shielding properties, but current tuning methods (e.g., thickness adjustment) have limitations.
  • Existing methods for enhancing UV shielding in PDA coatings can negatively impact color and visible light transmittance.

Purpose of the Study:

  • To develop a facile and modular approach for enhancing the UV absorption of PDA coatings.
  • To improve UV absorption while simultaneously reducing visible light absorption in PDA coatings.
  • To demonstrate the tunability of UV absorption by modifying the incorporated thiol-heterocycle derivatives.

Main Methods:

  • Incorporation of thiol-heterocycle (TH) derivatives into PDA coatings via pre- and post-modification strategies.
  • Investigating the effect of TH derivatives on the formation of conjugated structures within PDA.
  • Systematically altering the ring type (benzene or pyridine) and substituents (methoxyl or hydrogen) on the TH derivatives.

Main Results:

  • The proposed strategies effectively impeded conjugated structure formation in PDA, leading to enhanced UV absorption.
  • UV absorption of PDA coatings was significantly improved while visible light absorption was reduced.
  • The UV absorption of PDA coatings could be precisely regulated by modifying the TH derivatives' chemical structure.

Conclusions:

  • A novel and effective method for enhancing UV absorption in PDA coatings using TH derivatives was established.
  • These modified PDA coatings offer improved UV protection with better visible light transparency.
  • The developed PDA coatings show potential for applications in UV protection, antibacterial activity, wound healing, and dye degradation.