Related Experiment Video
Updated: Jun 1, 2026

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
Published on: February 11, 2016
A visible-light-driven transfer hydrogenation on CdS nanoparticles combined with iridium complexes
Jun Li1, Jinhui Yang, Fuyu Wen
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
This study introduces a novel visible-light-driven transfer hydrogenation method using cadmium sulfide (CdS) nanoparticles and iridium complexes. The process demonstrates high efficiency and selectivity for carbonyl and C=C compounds, with unique pH-dependent activity.
Area of Science:
- Photocatalysis
- Organometallic Chemistry
- Green Chemistry
Background:
- Transfer hydrogenation is a crucial organic transformation.
- Developing sustainable catalytic systems for hydrogenation is an ongoing challenge.
- Visible-light-driven catalysis offers an environmentally friendly alternative to traditional methods.
Purpose of the Study:
- To develop a visible-light-driven transfer hydrogenation system.
- To couple cadmium sulfide (CdS) nanoparticles with iridium complexes for enhanced catalytic performance.
- To investigate the catalytic activity, selectivity, and pH-dependent behavior of the developed system.
Main Methods:
- Synthesis and characterization of CdS nanoparticles.
- Preparation of iridium complexes.
- Coupling of CdS nanoparticles with iridium complexes.
- Visible-light-driven transfer hydrogenation reactions of carbonyl and C=C compounds.
- Evaluation of catalytic activity, selectivity, and influence of pH.
Main Results:
- The coupled CdS-iridium system effectively catalyzes visible-light-driven transfer hydrogenation.
- High catalytic activities and excellent selectivities were observed for both carbonyl and C=C compounds.
- A unique pH-dependent catalytic activity was identified, offering tunable reaction control.
- The system demonstrates robustness and reusability.
Conclusions:
- A novel and efficient visible-light-driven transfer hydrogenation protocol has been established.
- The synergistic combination of CdS nanoparticles and iridium complexes provides a powerful catalytic platform.
- The pH-dependent activity opens new avenues for controlling hydrogenation reactions using sustainable light energy.
Related Concept Videos
Reduction of Alkenes: 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 surface of...
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
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...
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

