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

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.8K

You might also read

Related Articles

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

Sort by
Same author

Molecularly Precise Triangular Termination of Kagome Covalent Organic Framework Crystals Enabled by Side-Chain Engineering.

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

Combinatorial Design of Benzodithiophene-Benzothiadiazole Building Blocks for Ultralarge Pore Optoelectronically Tunable Covalent Organic Frameworks.

Journal of the American Chemical Society·2026
Same author

Tuning Redox Behavior of Pyrene-Benzothiadiazole/TTF-Based Covalent Organic Framework Electrodes in Dual-Ion Batteries.

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

Photoactive Thiophene-Enriched Tetrathienonaphthalene-Based Covalent Organic Frameworks.

Small (Weinheim an der Bergstrasse, Germany)·2025
Same author

Redox-Active Microporous Covalent Organic Frameworks for Additive-Free Supercapacitors.

Small science·2025
Same author

Surface Charge Modulation in Covalent Organic Frameworks for Controlled Pt-Photodeposition and Enhanced Photocatalytic Hydrogen Evolution.

Small (Weinheim an der Bergstrasse, Germany)·2025

Related Experiment Video

Updated: Jun 17, 2025

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

7.7K

Tunable Isometric Donor-Acceptor Wurster-Type Covalent Organic Framework Photocathodes.

Roman Guntermann1, David Helminger1, Laura Frey1

  • 1Department of Chemistry and Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität (LMU), Butenandtstraße 11 (E), 81377, Munich, Germany.

Angewandte Chemie (International Ed. in English)
|August 13, 2024
PubMed
Summary

We synthesized photoactive Wurster-type covalent organic frameworks (COFs) with tunable optical properties. These advanced COFs show potential for efficient photoelectrochemical water splitting applications.

Keywords:
covalent organic frameworksdonor-acceptor systemsoptical propertiesphotoelectrochemical water splittingthin films

More Related Videos

Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds
11:44

Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds

Published on: October 18, 2018

26.5K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

2.3K

Related Experiment Videos

Last Updated: Jun 17, 2025

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

7.7K
Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds
11:44

Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds

Published on: October 18, 2018

26.5K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

2.3K

Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Covalent organic frameworks (COFs) are versatile materials with ordered structures, high porosity, and tunable functionalities.
  • Photoactive COFs are crucial for energy conversion applications like water splitting.

Purpose of the Study:

  • To synthesize and characterize a series of isostructural, photoactive Wurster-type COFs.
  • To investigate the effect of varying acceptor strengths in donor-acceptor-donor (D-A-D) Wurster building blocks on COF properties.
  • To evaluate the performance of these COFs in photoelectrochemical (PEC) water splitting.

Main Methods:

  • Synthesis of D-A-D Wurster building blocks with varying heteroaromatic acceptors.
  • Integration of building blocks into 2D COF scaffolds.
  • Characterization using X-ray diffraction, photoluminescence spectroscopy, and PEC measurements.
  • Fabrication of homogeneous and oriented thin films.

Main Results:

  • Achieved highly crystalline, isostructural COFs with uniform morphologies.
  • Demonstrated tunable red-shift in film emission exceeding 100 nm.
  • Observed doubled current density in PEC water splitting for the COF with the strongest acceptor unit (8.1 μA cm⁻² at 0.2 VRHE).

Conclusions:

  • Wurster D-A-D COFs offer a promising platform for tuning optical properties and enhancing PEC water splitting performance.
  • The study highlights the structure-property relationships in COFs for energy applications.
  • Further exploration of chemical functionality for improved reactivity and properties is warranted.