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

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.8K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.8K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

13.9K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.9K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.2K
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
2.2K
Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule02:17

Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule

16.3K
If a set of reactants can yield multiple constitutional isomers, but one of the isomers is obtained as the major product, the reaction is said to be regioselective. In such reactions, bond formation or breaking is favored at one reaction site over others.
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
16.3K
Radical Anti-Markovnikov Addition to Alkenes: Overview01:25

Radical Anti-Markovnikov Addition to Alkenes: Overview

4.0K
The addition of hydrogen bromide to alkenes in the presence of hydroperoxides or peroxides proceeds via an anti-Markovnikov pathway and yields alkyl bromides.
4.0K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration02:34

Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration

9.5K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
9.5K

You might also read

Related Articles

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

Sort by
Same author

Bridging solar harvesting technologies using hydrogels towards sustainability.

Chemical Society reviews·2026
Same author

Intradermal Injections of 10% Glucose (Sihler G) for Scalp Hair Regrowth: A Randomized, Evaluator-Blinded Pilot Study.

Aesthetic plastic surgery·2026
Same author

Clinical outcomes of intravascular imaging-guided versus angiography-guided drug-coated balloon angioplasty for de novo coronary lesions.

International journal of cardiology·2026
Same author

Investigating degradation mechanisms in organic light-emitting diodes using operando electrically pumped spectroscopy.

Light, science & applications·2026
Same author

Redispersible nanoalum-adjuvanted hepatitis B vaccine microneedles with enhanced immunogenicity.

Drug delivery and translational research·2026
Same author

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

Advanced materials (Deerfield Beach, Fla.)·2026

Related Experiment Video

Updated: Jan 18, 2026

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
09:22

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications

Published on: July 25, 2025

681

Polarization-Selective Efficient Hydrogen Evolution Reactions via Chiral Photocatalysis.

Haeun Kang1,2,3, Dong-Il Won1,3,4, Hyung Joo Lee5

  • 1Department of Chemistry and Nanoscience, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, Seoul, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|January 16, 2026
PubMed
Summary

This study introduces a novel chiral plasmonic photocatalyst for enhanced solar hydrogen production. Chirality-matched light and catalyst pairs significantly boost hydrogen evolution rates by suppressing recombination and improving light absorption.

Keywords:
chiral photocatalystcircularly polarized lighthydrogen evolution reactionlight‐matter interaction

More Related Videos

Hydrogen Production and Utilization in a Membrane Reactor
10:00

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

3.1K
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

8.9K

Related Experiment Videos

Last Updated: Jan 18, 2026

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
09:22

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications

Published on: July 25, 2025

681
Hydrogen Production and Utilization in a Membrane Reactor
10:00

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

3.1K
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

8.9K

Area of Science:

  • Materials Science
  • Photocatalysis
  • Renewable Energy

Background:

  • Growing demand for sustainable energy drives research into efficient solar-driven hydrogen production.
  • Conventional semiconductors face challenges like electron-hole recombination and limited light absorption, necessitating innovative photocatalyst designs.
  • Advanced photocatalysts are crucial for improving the efficiency of the hydrogen evolution reaction (HER).

Purpose of the Study:

  • To develop a novel chirality-integrated plasmonic photocatalyst for enhanced solar-driven hydrogen production.
  • To investigate the effect of optical chirality on photocatalytic activity and electron-hole dynamics.
  • To establish a new paradigm in photocatalyst design by coupling chirality with light-matter interactions.

Main Methods:

  • Synthesis of R-Au/C3N4 and L-Au/C3N4 chiral photocatalysts using circularly polarized light (CPL)-guided growth of gold nanoparticles on g-C3N4.
  • Evaluation of hydrogen evolution rates under different CPL conditions (RCP and LCP) and comparison with achiral catalysts.
  • In-situ FTIR and time-resolved photoluminescence (TRPL) for analyzing reaction mechanisms and electron dynamics.
  • Ex-situ EXAFS measurements to assess the structural durability of the chiral catalyst.

Main Results:

  • R-Au/C3N4 under right-handed CPL (RCP) showed a 2.10-fold increase in hydrogen evolution rate compared to left-handed CPL (LCP).
  • The chiral photocatalyst demonstrated a 1.71-fold improvement over achiral counterparts under optimized CPL illumination.
  • Chirality-matched light-catalyst pairs effectively suppressed energy transfer, enriched excited electrons, and accelerated HER.
  • Chiral matching conditions enhanced the structural durability of the photocatalyst.

Conclusions:

  • Chirality-integrated plasmonic photocatalysts offer a promising strategy for efficient solar-to-hydrogen conversion.
  • The CPL-responsive platform establishes a new paradigm by leveraging chirality and light-matter interactions for photocatalyst design.
  • This approach effectively addresses electron-hole recombination and enhances light absorption for improved HER efficiency.