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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
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Cu(II)-Based Pyridyl Bridging Coordination Polymer and Its Fe Composite: Structure, Sensing, Schottky Device, and
Koushik Saha, Pubali Das, Arnab Samanta1
1Department of Chemistry, Brainware University, Barasat, Kolkata 700125, India.
Inorganic Chemistry
|September 9, 2025
Summary
This study introduces a novel copper coordination polymer (CP1) with applications in sensing and catalysis. CP1 exhibits selective Fe3+ detection and enhanced electrocatalytic hydrogen evolution activity when modified with Fe(II).
Area of Science:
- Coordination Polymers
- Materials Science
- Nanotechnology
Background:
- Coordination polymers offer tunable properties for diverse applications.
- Developing efficient sensors and electrocatalysts remains a key research area.
Purpose of the Study:
- To synthesize and characterize a novel copper(II) coordination polymer, [Cu(3-bph)(PABA)2(H2O)] (CP1).
- To investigate the sensing capabilities of CP1 for Fe3+ ions.
- To evaluate the electrocatalytic hydrogen evolution reaction (HER) activity of CP1 and its composites.
Main Methods:
- Synthesis of the copper coordination polymer CP1.
- Characterization using spectroscopic (emission) and electrochemical techniques.
- Investigation of Fe3+ sensing via fluorescence quenching and FRET mechanism.
- Electrocatalytic HER performance evaluation of CP1 and Fe(II)-modified composites.
Main Results:
- CP1 exhibits a zigzag 1D lattice with a square pyramidal CuN2O3 motif and weak antiferromagnetic coupling.
- CP1 shows selective fluorescence quenching of Fe3+ with a low limit of detection (0.081 μM).
- Fe(II)-modified CP1 composites, particularly Fe(II)-2@CP1, demonstrate significantly improved HER activity with a lower overpotential (430 mV at 10 mA cm-2) and Tafel slope (92.4 mV dec-1).
Conclusions:
- The synthesized copper coordination polymer CP1 is a promising material for selective Fe3+ sensing.
- Fe(II) incorporation into the CP1 framework enhances its electrocatalytic activity for the hydrogen evolution reaction.
- The study highlights the potential of tailored coordination polymers in developing advanced functional materials.
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