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Related Concept Videos

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Related Experiment Video

Updated: Jun 16, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
10:51

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Published on: April 10, 2015

Dissolved N(2) sensing by pH-dependent Ru complexes.

Tetsuro Kizaki1, Takahiro Matsumoto, Seiji Ogo

  • 1Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan.

Dalton Transactions (Cambridge, England : 2003)
|January 28, 2010
PubMed
Summary
This summary is machine-generated.

Researchers developed novel water-soluble ruthenium complexes for sensing dissolved nitrogen gas. These sensors are reversible and pH-switchable, enabling sensitive detection at low nitrogen pressures.

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Synthesis and Evaluation of a Ruthenium-based Mitochondrial Calcium Uptake Inhibitor
07:12

Synthesis and Evaluation of a Ruthenium-based Mitochondrial Calcium Uptake Inhibitor

Published on: October 26, 2017

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Development of effective sensors for dissolved gases like nitrogen (N2) is crucial for various environmental and industrial applications.
  • Existing water-soluble N2 sensors often lack reversibility or pH-switchable properties, limiting their practical utility.
  • Ruthenium(II) complexes with macrocyclic ligands have shown promise in sensing applications due to their unique photophysical and electrochemical properties.

Purpose of the Study:

  • To synthesize and characterize novel water-soluble ruthenium(II) complexes with the 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (TMC) ligand.
  • To investigate the potential of these complexes as colorimetric sensors for dissolved nitrogen gas (N2).
  • To evaluate the reversibility and pH-switchable characteristics of the N2 sensing mechanism.

Main Methods:

  • Synthesis of Ru(II) complexes with general formula [Ru(II)(X)(Y)(TMC)], where X and Y can be H2O or OH.
  • Characterization of the synthesized complexes using spectroscopic and analytical techniques.
  • Testing the sensing capabilities of the complexes for dissolved N2, including response time, sensitivity, and reversibility studies under varying pH conditions.

Main Results:

  • Successful synthesis and characterization of water-soluble Ru(II)-TMC complexes.
  • Demonstration of colorimetric sensing of dissolved N2 with high sensitivity, down to 0.01 MPa partial pressure.
  • Observation of reversible N2 binding that can be switched on at high pH and off at low pH, a significant improvement over previous sensors.

Conclusions:

  • The developed Ru(II)-TMC complexes represent a new class of water-soluble, reversible, and pH-switchable colorimetric sensors for dissolved N2.
  • These sensors offer enhanced performance and control compared to existing technologies, opening new avenues for real-time N2 monitoring.
  • The pH-switchable nature of the N2 binding provides a unique mechanism for controlling sensor activation and deactivation.