Electrically conductive Cu(II)-based 1D coordination polymer with theoretical insight

Area of Science:

• Materials Science
• Solid-State Chemistry
• Supramolecular Chemistry

Background:

• Coordination polymers (CPs) are versatile materials with tunable properties.
• Investigating the relationship between structure and electronic properties in CPs is crucial for developing advanced functional materials.
• Nitro-functionalization and specific ligand choices can influence CP self-assembly and conductivity.

Purpose of the Study:

• To synthesize and characterize a novel nitro-functionalized copper(II)-based one-dimensional coordination polymer (1D CP).
• To investigate the solid-state self-assembly and supramolecular structure of the synthesized CP.
• To evaluate the electrical conductivity and diode behavior of the 1D CP.

Main Methods:

• Synthesis of [Cu(nip)(4-phpy)2]n using 5-nitroisophthalic acid (H2nip) and 4-phenylpyridine (4-phpy).
• Characterization using elemental analysis, powder X-ray diffraction (PXRD), and single crystal X-ray diffraction (SCXRD).
• Electrical conductivity measurements and Schottky barrier diode testing.

Main Results:

• Successful synthesis and structural determination of the 1D CP, [Cu(nip)(4-phpy)2]n.
• Observation of 3D supramolecular packing driven by CHπ and ππ interactions between ligands.
• Demonstration of electrical conductivity in the semiconducting regime.
• Confirmation of Schottky barrier diode behavior.

Conclusions:

• The synthesized nitro-functionalized copper coordination polymer self-assembles into a 3D supramolecular structure.
• The material exhibits semiconducting properties and functions as a Schottky barrier diode.
• This study highlights the potential of 1D CPs in electronic applications.