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

2.4K
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
2.4K
Catalysis02:50

Catalysis

31.5K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
31.5K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

3.1K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
3.1K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.8K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.8K
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

51
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
51

You might also read

Related Articles

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

Sort by
Same author

Aggregation-Induced Emission Governed by Self-Assembly Pathways in NHC-Au(I) Carbazolate Complexes.

Inorganic chemistry·2026
Same author

Supramolecular dye polymers for aggregation-induced photocatalysis.

Nature chemistry·2026
Same author

Hidden Diradical: Conformational Switch for Solvatochromic NIR Emission With Unity Quantum Yield in Thiele's Hydrocarbon.

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

Modulating C <sub><b>2</b></sub> Selectivity in CO <sub><b>2</b></sub> Electroreduction through Molecular Surface Engineering of Copper Nanowires.

ACS applied energy materials·2025
Same author

Reinventing Chemiluminescence through Redox-Driven Self-Assembly.

Journal of the American Chemical Society·2025
Same author

Dynamic Reconfiguration of Pt(II) Supramolecular Assemblies via Ligand Exchange.

ACS applied materials & interfaces·2025
Same journal

Proton Transfer Shuttle Mediated Dormant-Active Balance for Accelerated and Controlled Polymerization of N-Carboxyanhydrides.

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

Chloride-Regulated Depolymerization of Aluminosilicate Networks for Fast Ion Transport Compliant Interfaces in Sustainable All-Solid-State Sodium Batteries.

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

Asymmetric Zn─N<sub>2</sub>O-Coordinated Hydrogen-Bonded Organic Frameworks for Electrochemical Hydrogen Peroxide Production and Wastewater Purification.

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

Photocatalytic Cascade Nitrogen Fixation for Selective Purification of Methane-Rich Coal-Bed Gas Over a Bimetallic MOF.

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

Scalable Art-Inspired Tessellated Covalent Organic Framework Membranes Enable Highly Selective Ion Separation.

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

Layered Copper-Anthraquinone Coordination Polymer Cathode Leveraging Dual-Redox Sites and Facilitated Ion Diffusion for High-Performance Lithium-Ion Batteries.

Angewandte Chemie (International ed. in English)·2026
See all related articles

Related Experiment Video

Updated: Mar 11, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

9.1K

Out-of-Equilibrium Supramolecular Assembly Sustained by Photocatalysis.

E Pelorosso1, M Scaccaglia1, A Fortunato1

  • 1Dipartimento Di Scienze Chimiche, Università degli Studi di Padova, Padova, Italy.

Angewandte Chemie (International Ed. in English)
|March 10, 2026
PubMed
Summary
This summary is machine-generated.

This study reveals a platinum(II) supramolecular system where catalytic activity is linked to a non-equilibrium state. Light sustains this active state, enabling photocatalytic hydrogen evolution, but it reverts to an inactive form without light.

More Related Videos

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.5K
Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis
10:26

Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis

Published on: October 26, 2015

8.3K

Related Experiment Videos

Last Updated: Mar 11, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

9.1K
Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.5K
Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis
10:26

Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis

Published on: October 26, 2015

8.3K

Area of Science:

  • Supramolecular Chemistry
  • Photocatalysis
  • Materials Science

Background:

  • Supramolecular structures can be stable or functional.
  • Understanding the relationship between structure, stability, and function is crucial.

Purpose of the Study:

  • To investigate a platinum(II) supramolecular system with light-driven catalytic activity.
  • To demonstrate how catalytic function can be confined to far-from-equilibrium assemblies.

Main Methods:

  • Synthesis and characterization of platinum(II) supramolecular complexes.
  • Spectroscopic analysis to identify emissive species (PtA and PtB).
  • Photocatalytic experiments for hydrogen evolution using aqueous ascorbate.

Main Results:

  • Two emissive species formed: kinetically trapped, orange-emissive PtA and stable, blue-emissive PtB.
  • Only PtA exhibited photocatalytic activity for hydrogen evolution.
  • Continuous irradiation maintained PtA in an active, out-of-equilibrium state, preventing conversion to inactive PtB.

Conclusions:

  • Catalytic activity is uniquely associated with the far-from-equilibrium aggregate (PtA).
  • Light energy input sustains the active state through photocatalytic turnover.
  • This system showcases energy dissipation-driven catalysis in non-equilibrium supramolecular assemblies.