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Updated: Feb 14, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
An Organic Mixed-Valence Ligand for Multistate Redox-Active Coordination Networks
Joo Yeon Ha1,2, Jin Young Koo3, Hiroyoshi Ohtsu4
1Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Cheongam-ro 77, Namgu, Pohang, 37673, Republic of Korea.
Abstract:
The multistate redox-active/multi-interactive ligand 5,5',8,8'-tetra(4-pyridyl)-2,2'-(1,4-phenylene)bis-1H-perimidine (H2 TPP) was designed and synthesized. H2 TPP undergoes four one-electron oxidation steps, and was used for the preparation of a multistate redox-active coordination network in a solid-liquid interface reaction using molten Cd2+ salts. The multiple redox states of H2 TPP were confirmed spectroscopically by stepwise four-electron oxidation. Spectroscopic analysis indicated that the mixed-valence states of the ligand are class II on the UV/Vis/NIR timescale and borderline class II/class III on the ESR timescale.
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