Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Photochemical Electrocyclic Reactions: Stereochemistry

Photochemical Electrocyclic Reactions: Stereochemistry

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

The Photochemical Reaction Center

The Photochemical Reaction Center

Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...

Photosystem II

Photosystem II

The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...

Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism

Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism

Birch reduction uses solvated electrons as reducing agents. The reaction converts benzene to 1,4-cyclohexadiene. The reaction proceeds by the transfer of a single electron to the ring to form a benzene radical anion. This anion is highly basic—it abstracts a proton from the alcohol to form a cyclohexadienyl radical. Another single electron transfer gives the cyclohexadienyl anion. A proton transfer from the alcohol forms 1,4-cyclohexadiene. Since this reduction occurs via radical anion...

Photosystem I

Photosystem I

Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...

Cycloaddition Reactions: MO Requirements for Photochemical Activation

Cycloaddition Reactions: MO Requirements for Photochemical Activation

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.

You might also read

Related Articles

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

Sort by

Same author

Introducing an insulating alumina layer into a molecular photocathode to improve CO<sub>2</sub> reduction activity.

Chemical communications (Cambridge, England)·2026

Same author

Nickel(II) driven activity enhancement of a donor-acceptor porous organic polymer for selective photoreduction of carbon dioxide.

Chemical communications (Cambridge, England)·2026

Same author

Photocatalytic CO<sub>2</sub> reduction using a diazabenzacenaphthenium photosensitizer and a Mn catalyst.

Chemical science·2026

Same author

Efficient and Selective Photocatalytic Conversion of Low-Concentration CO<sub>2</sub> to CO Using Mn-Complex Catalysts.

Journal of the American Chemical Society·2025

Same author

Importance of Selective Quenching of the Triplet Excited State of Thermally Activated Delayed Fluorescence (TADF) Photosensitizers in Redox-Photosensitized Reactions: Case Studies on Photocatalytic CO<sub>2</sub> Reduction.

Journal of the American Chemical Society·2025

Same author

Development of a Highly Durable Photocatalytic CO<sub>2</sub> Reduction Using a Mn-Complex Catalyst: Application of Selective Photosplitting of a Mn(0)-Mn(0) Bond.

Journal of the American Chemical Society·2025

Same journal

Hydrogen-Bond-Directed Assembly of Polyanionic Cluster [Mo<sub>2</sub>O<sub>5</sub>(IO<sub>3</sub>)<sub>4</sub>]<sup>2-</sup> for Nonlinear Optical Crystal Design.

Inorganic chemistry·2026

Same journal

Synthesis and Reactivity of Boron Triflate and Bistriflimide Complexes Bearing Two <i>ortho</i>-Carboranes.

Inorganic chemistry·2026

Same journal

Switchable Fluorescence of a Three-Dimensional Coordination Polymer Based on Reversible Single-Crystal to Single-Crystal Photoreaction.

Inorganic chemistry·2026

Same journal

8-Aminoquinoline Pendant Ligand-Driven Proton Shuttling in Copper Electrocatalysis for Enhanced Proton Reduction into Hydrogen Gas.

Inorganic chemistry·2026

Same journal

Observation of Structural and Electronic Transitions in Bimetallic Chalcogenide of Copper Tantalum Trisulfide via Pressure Engineering.

Inorganic chemistry·2026

Same journal

Theoretical Structure Prediction and High-Pressure Synthesis of a Layered Sodium Silicide Zintl Phase: Na<sub>2</sub>Si<sub>3</sub>.

Inorganic chemistry·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 28, 2026

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

Photochemical CO₂ Reduction Using a Ir(III)-Rh(III) Supramolecular Photocatalyst.

Nandini M Gotgi¹, Jayachandran Kaippully², Fazalurahman Kuttassery²

¹Department of Chemistry, St Joseph's University, 36 Lalbagh Road, Bengaluru, Karnataka 560027, India.

Inorganic Chemistry

|February 25, 2026

Summary

This summary is machine-generated.

A new supramolecular photocatalyst (Ir-Rh) efficiently converts carbon dioxide (CO2) into formic acid. This advanced catalyst demonstrates high selectivity, offering a promising avenue for sustainable CO2 utilization.

More Related Videos

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

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

Published on: October 5, 2019

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

Related Experiment Videos

Last Updated: Feb 28, 2026

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

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

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

Published on: October 5, 2019

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

Area of Science:

Supramolecular chemistry
Photocatalysis
CO2 conversion

Background:

Photocatalytic CO2 conversion is of significant interest for sustainable chemistry.
Development of efficient and selective photocatalysts is crucial.

Purpose of the Study:

To develop a novel supramolecular photocatalyst for CO2 reduction.
To investigate the photocatalytic activity and mechanism of the developed catalyst.

Main Methods:

Synthesis and characterization of a new Ir(III)-Rh(III) supramolecular photocatalyst (Ir-Rh).
Photophysical and electrochemical studies of the complexes.
Evaluation of photocatalytic CO2 reduction using 1-benzyl-1,4-dihydronicotinamide (BNAH) as electron donor.

Main Results:

The Ir-Rh supramolecular photocatalyst efficiently converted CO2 to formic acid with high selectivity (>90%).
The supramolecular system outperformed a combination of individual mononuclear complexes.
Mechanism explored via in situ UV-vis absorption and electrochemical studies.

Conclusions:

The developed Ir-Rh supramolecular photocatalyst is highly effective for selective CO2 reduction to formic acid.
The supramolecular architecture enhances photocatalytic performance compared to mononuclear counterparts.
This work provides insights into the mechanism of photocatalytic CO2 reduction.