Dual-Template-Directed Zero-Dimensional Bismuth Chlorides: Structures, Luminescence, Photoinduced Chromism, and...

Area of Science:

• Materials Science
• Inorganic Chemistry
• Solid-State Chemistry

Background:

• Zero-dimensional (0D) hybrid organic-inorganic bismuth halides are explored as lead-free alternatives.
• Developing materials with multiple responsive properties is crucial for advanced applications.

Purpose of the Study:

• To synthesize and characterize novel 0D hybrid bismuth chlorides with mixed-cation phases.
• To investigate their photoluminescence, photochromism, and proton conduction behaviors.

Main Methods:

• Solvothermal synthesis method was employed.
• Photoluminescence spectroscopy, X-ray diffraction, and theoretical calculations were used.
• Photochromism and proton conductivity were studied under varying conditions.

Main Results:

• Two compounds, [HPDA][H2PDA]BiCl6 (1) and [Hbzim][H2PA]BiCl6 (2), were successfully synthesized.
• Compound 1 showed simultaneous blue fluorescence and yellow-green phosphorescence; Compound 2 exhibited wide-band yellow-green emission.
• Both compounds displayed free radical-driven photochromism and temperature-dependent proton conduction, with conductivity enhanced by light.

Conclusions:

• Novel 0D hybrid mixed-cation bismuth halides with combined photoluminescence, photochromism, and photomodulated proton conduction were developed.
• These materials enrich the dual-template-directed metal halide system.
• The findings offer a viable route for synthesizing photoresponsive smart materials.