Design and characterization of novel pyridylbenzimidazole-based ruthenium(II) complexes, and their evaluation in singlet oxygen generation
Abstract
Six new ruthenium(II) polypyridyl complexes incorporating pyridinyl, quinolinyl, or isoquinolinyl-benzimidazole ligands were synthesized to investigate the influence of π-conjugated mono- and bis-chelating ligands on their photophysical and electrochemical properties, and compared to the frontrunner [Ru(bpy) ₃ ](PF ₆ ) ₂ . Their evaluation reveals that ligand π-extension modulates the ILCT and MLCT transitions, leading to red-shifted absorption and tunable excited-state redox potentials. The mononuclear complexes were further evaluated as visible-light photocatalysts through reactive oxygen species (ROS) generation and a model α-arylation reaction. These findings demonstrate that benzimidazole-based ligand engineering provides an effective strategy to tune the excited-state properties and photocatalytic behavior of ruthenium complexes.
Related
- Water-Soluble Diiron Bis-Aminocarbyne Complexes: Photoinduced CO Substitution, Generation of Diiron(I) Aqua-Carbonyl Complexes, and Biological Evaluation
- Solid-State Host–Guest Chemistry of Cyanoborate-Bridged Cubane-Type Tetranuclear Ruthenium Complexes: Solvate Crystal Formation and Reversible Sorption of Volatile Organic Compounds
- Visible-Light-Driven C-F Bond Cleavage in Perfluoroalkyl Carboxylic Acids: Readily Accessible Ruthenium-Bipyridine Complexes as Effective Catalysts.
- Synthesis, characterization and biological evaluation of newly designed silver(I)-N-heterocyclic carbene (NHC) complexes
- Temperature- and matrix-dependent excited state equilibria in pyrene-linked ruthenium and iridium complexes
BibTeX
@article{yaw2026design,
title = {{Design and characterization of novel pyridylbenzimidazole-based ruthenium(II) complexes, and their evaluation in singlet oxygen generation}},
author = {Benjamin Riss Yaw and Anna Porcher and Alice Saunier and Jean-Christophe Cintrat and Eugénie Romero},
journal = {Beilstein Journal of Organic Chemistry},
year = {2026},
month = nov,
doi = {10.3762/bjoc.22.126},
url = {https://www.beilstein-journals.org/bjoc/articles/22/126},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Design and characterization of novel pyridylbenzimidazole-based ruthenium(II) complexes, and their evaluation in singlet oxygen generation
AU - Benjamin Riss Yaw
AU - Anna Porcher
AU - Alice Saunier
AU - Jean-Christophe Cintrat
AU - Eugénie Romero
PY - 2026
DA - 2026/11/04
JO - Beilstein Journal of Organic Chemistry
DO - 10.3762/bjoc.22.126
UR - https://www.beilstein-journals.org/bjoc/articles/22/126
AB - Six new ruthenium(II) polypyridyl complexes incorporating pyridinyl, quinolinyl, or isoquinolinyl-benzimidazole ligands were synthesized to investigate the influence of π-conjugated mono- and bis-chelating ligands on their photophysical and electrochemical properties, and compared to the frontrunner [Ru(bpy) ₃ ](PF ₆ ) ₂ . Their evaluation reveals that ligand π-extension modulates the ILCT and MLCT transitions, leading to red-shifted absorption and tunable excited-state redox potentials. The mononuclear complexes were further evaluated as visible-light photocatalysts through reactive oxygen species (ROS) generation and a model α-arylation reaction. These findings demonstrate that benzimidazole-based ligand engineering provides an effective strategy to tune the excited-state properties and photocatalytic behavior of ruthenium complexes.
SN - 1860-5397
ER -