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Updated: Mar 17, 2026

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Efficient molecular ruthenium catalysts containing anionic ligands for water oxidation
Zhongkai Lu1, Yan Gao1, Hong Chen2
1State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian 116024, China. dr.gaoyan@dlut.edu.cn.
Two new ruthenium complexes were synthesized for water oxidation catalysis. Complex 1 demonstrated high activity and stability, with a RuIV-OH intermediate detected, advancing water oxidation mechanisms.
Area of Science:
- Coordination Chemistry
- Catalysis
- Green Chemistry
Background:
- Water oxidation is crucial for artificial photosynthesis and renewable energy.
- Developing efficient and stable homogeneous catalysts remains a significant challenge.
Purpose of the Study:
- To synthesize and characterize novel mononuclear ruthenium (Ru) complexes.
- To evaluate their catalytic activity and stability in water oxidation.
- To elucidate the mechanism of O-O bond formation.
Main Methods:
- Synthesis of RuII(bipa)(pic)3 and RuII(pbic)(pic)3 complexes.
- Characterization using NMR spectroscopy, mass spectrometry, and X-ray crystallography.
- Homogeneous water oxidation catalysis with mechanistic studies using high-resolution mass spectrometry.
Main Results:
- Successful synthesis and full characterization of two new Ru(II) complexes.
- Complex 1 exhibited high catalytic activity (TON = 2100, TOF = 0.21 s-1) and stability in water oxidation.
- Evidence for a RuIV-OH active intermediate and a water nucleophilic attack mechanism.
Conclusions:
- The novel Ru complexes are effective homogeneous catalysts for water oxidation.
- The study provides insights into the catalytic mechanism, identifying key intermediates.
- These findings contribute to the development of advanced catalysts for sustainable energy applications.
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