Luminescent Covalent-Organic Frameworks: Design Strategies, Photophysical Mechanisms, and Applications.

Area of Science:

• Materials Science
• Chemistry
• Physics

Background:

• Covalent-organic frameworks (COFs) are crystalline porous polymers with tunable structures.
• Luminescent COFs offer unique optical properties for advanced applications.

Purpose of the Study:

• To review the crystal engineering, building blocks, and photophysical mechanisms of luminescent COFs.
• To highlight the diverse applications of luminescent COFs.
• To discuss future prospects and challenges in the field.

Main Methods:

• Survey of molecular building blocks and crystal engineering strategies for luminescent COFs.
• Analysis of photophysical mechanisms (fluorescence, phosphorescence) and tuning strategies.
• Compilation of current and potential applications.

Main Results:

• Judicious selection of building blocks and framework design enable high luminescent performance in COFs.
• Various strategies like isotope effects, aggregation-induced emission, and host-guest interactions fine-tune emission.
• Luminescent COFs show promise in white-light devices, sensing, drug delivery, and nonlinear optics.

Conclusions:

• Luminescent COFs are versatile materials with significant potential in optoelectronics and beyond.
• Further research in material design and mechanistic understanding will unlock broader applications.
• Overcoming current challenges is key to realizing the full potential of luminescent COFs.