Bis(dipyrrinato)metal(ii) coordination polymers: crystallization, exfoliation into single wires, and electric...

Area of Science:

• Materials Science
• Nanotechnology
• Coordination Chemistry

Background:

• One-dimensional coordination polymers (1D-CPs) often suffer from poor stability and processability, limiting their practical applications.
• Developing robust and processable 1D-CPs is crucial for advancing functional materials.

Purpose of the Study:

• To synthesize stable and processable one-dimensional coordination polymers (1D-CPs) using dipyrrin ligands and divalent metal ions.
• To explore the potential of these 1D-CPs in photoelectric conversion systems and functional material applications.

Main Methods:

• Synthesis of 1D-CPs via a liquid/liquid interfacial reaction.
• Characterization using X-ray diffraction and atomic force microscopy (AFM).
• Exfoliation of 1D-CP fibers and fabrication of thin films and conjugates with single-wall carbon nanotubes (SWCNTs).

Main Results:

• Successfully synthesized single crystals of 1D-CPs with Zn²⁺, Ni²⁺, and Cu²⁺.
• Exfoliated single fibers of zinc 1D-CP with lengths exceeding several micrometers.
• Demonstrated processability of exfoliated 1D-CPs into thin films and SWCNT conjugates.
• Achieved photoelectric conversion ability using modified SnO₂ electrodes as photoanodes.
• Tuned properties, including luminescence and extended photoelectric response, through ligand modification.

Conclusions:

• The developed liquid/liquid interfacial method yields stable and processable 1D-CPs.
• These 1D-CPs show promise for applications in photoelectric conversion systems.
• Ligand design offers a pathway to tailor the optical and electronic properties of 1D-CPs.