A zero-dimensional (C₆H₉N₂)₃[BiCl₆] hybrid material: synthesis and structural, optical, and electrical conductivity

Area of Science:

• Materials Science
• Solid State Chemistry
• Crystallography

Background:

• Organic-inorganic hybrid compounds offer unique properties for various applications.
• Bismuth-based compounds are of interest for their electronic and optical characteristics.

Purpose of the Study:

• Synthesize and characterize a novel organic-inorganic hybrid compound, (C6H9N2)3[BiCl6].
• Investigate its structural, thermal, optical, electrical, and dielectric properties.
• Assess its potential for energy storage applications.

Main Methods:

• Slow evaporation technique for synthesis at room temperature.
• X-ray diffraction for structural analysis.
• Differential scanning calorimetry for thermal analysis.
• UV-visible absorption spectroscopy for optical properties.
• Complex impedance spectroscopy (CIS) for electrical and dielectric measurements.

Main Results:

• The compound crystallizes in a triclinic system (space group P1̄).
• A phase transition was observed at 420 K.
• Optical studies confirmed its semiconducting nature.
• Electrical measurements showed frequency and temperature dependence, with non-Debye relaxation and AC conductivity following Jonscher's law.
• The correlated barrier-hopping (CBH) model describes the conduction mechanism.
• A high dielectric constant was measured.

Conclusions:

• The synthesized (C6H9N2)3[BiCl6] is a promising semiconducting material.
• Its properties, including a high dielectric constant, suggest significant potential for energy storage devices.
• Further research into its application in energy storage is warranted.