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
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.3K
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.
2.3K

You might also read

Related Articles

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

Sort by
Same author

Association Between Systemic Immune-Inflammation Index and Sepsis-Induced Liver Injury in Adult Patients With Sepsis: A Retrospective Cohort Study.

Immunity, inflammation and disease·2026
Same author

Toward a Unified Mechanistic Understanding of Polymer Electrolytes for Advanced Solid-State Batteries.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Intelligent optimization algorithms-assisted design of quad-mode smart window based on GST and VO<sub>2</sub> for all-season thermal management.

Optics express·2026
Same author

Identification and external validation of a prognostic signature based on bone morphogenetic protein-related mRNAs for kidney renal clear cell carcinoma.

Discover oncology·2026
Same author

Hypervalent Iodine-Mediated Stereotactic Amidation Enables COF-to-COF Transformation for Supercapacitors.

Journal of the American Chemical Society·2026
Same author

When machines explain medicine: Nursing ethics and clinical communication.

Nursing ethics·2026

Related Experiment Video

Updated: Jun 1, 2025

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

8.3K

Optimizing photocatalysis via electron spin control.

Shaoxiong He1,2, Yanxi Chen2, Jingyun Fang2

  • 1Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore. z.lin@nus.edu.sg.

Chemical Society Reviews
|January 22, 2025
PubMed
Summary
This summary is machine-generated.

Electron spin control is revolutionizing solar photocatalysis by improving light absorption, charge separation, and reaction kinetics. This review details strategies and applications for enhanced photocatalytic performance.

More Related Videos

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
09:30

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Published on: June 28, 2017

9.6K
A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
08:30

A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation

Published on: October 6, 2022

2.1K

Related Experiment Videos

Last Updated: Jun 1, 2025

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

8.3K
Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
09:30

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Published on: June 28, 2017

9.6K
A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
08:30

A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation

Published on: October 6, 2022

2.1K

Area of Science:

  • Materials Science
  • Photocatalysis
  • Quantum Chemistry

Background:

  • Solar photocatalysis offers solutions for energy and environmental challenges but faces limitations in efficiency.
  • Electron spin control has emerged as a promising strategy to overcome these limitations in photocatalytic systems.
  • Optimizing light absorption, charge separation, and surface kinetics are key challenges addressed by spin control.

Purpose of the Study:

  • To provide a comprehensive review of electron spin control in photocatalysis.
  • To summarize fundamental principles, experimental techniques, and advanced manipulation strategies.
  • To highlight the impact of spin control on various photocatalytic applications and future research directions.

Main Methods:

  • Review of fundamental concepts of electron spin control in materials.
  • Summary of techniques for characterizing electron spin states in photocatalysts.
  • Analysis of advanced strategies: doping, defect engineering, magnetic fields, metal coordination, chiral-induced spin selectivity, and combined approaches.

Main Results:

  • Electron spin manipulation enhances light absorption via band tuning and promotes charge separation through spin polarization.
  • Improved surface reaction kinetics and product selectivity are achieved by strengthening surface interactions.
  • Demonstrated success in photocatalytic water splitting, CO2 reduction, pollutant degradation, and N2 fixation.

Conclusions:

  • Electron spin control is a powerful tool for significantly enhancing photocatalytic efficiency.
  • Further research into spin manipulation strategies will drive advancements in solar energy conversion and environmental remediation.
  • This review provides critical insights for future development of high-performance photocatalysts.