Playing with organic radicals as building blocks for functional molecular materials

Area of Science:

• Materials Science
• Organic Chemistry
• Physics

Background:

• Persistent organic radicals are well-studied for synthesis and properties.
• Fewer reports exist on their use as building blocks for multifunctional magnetic materials.
• These materials offer potential in spintronics, bistable memory, and sensing.

Purpose of the Study:

• To provide an up-to-date critical review of multifunctional magnetic materials derived from persistent organic radicals.
• To survey common radical families including nitroxide, triphenylmethyl, verdazyl, phenalenyl, and dithiadiazolyl.
• To classify these materials based on their magnetic, conducting, and optical properties.

Main Methods:

• Literature review of scientific publications.
• Classification of materials based on radical type and properties.
• Analysis of applications in spintronics, memory devices, and sensing.

Main Results:

• Detailed revision of nitroxide, triphenylmethyl, verdazyl, phenalenyl, and dithiadiazolyl radicals.
• Categorization into materials exhibiting magnetic, conducting, and optical properties.
• Inclusion of a section on switchable materials based on these radicals.

Conclusions:

• Persistent organic radicals are versatile building blocks for advanced functional materials.
• Multifunctional magnetic materials offer promising avenues for next-generation electronic and sensing devices.
• This review consolidates current knowledge and highlights future research directions.