Inorganic Building Unit Isomerization Engineering for Multicolor Room Temperature Phosphorescence.

Area of Science:

• Materials Science
• Chemistry
• Solid-State Physics

Background:

• Room temperature phosphorescence (RTP) materials are crucial for various applications.
• Controlling the emission color of RTP materials remains a significant challenge in current research.

Purpose of the Study:

• To propose a facile strategy for regulating RTP color using "inorganic building unit (IBU) isomerization engineering."
• To explore the potential of coordination polymers (CPs) as RTP materials with tunable colors.

Main Methods:

• Synthesized four coordination polymers (CPs) with varying structures from the same raw material.
• Investigated the relationship between IBU isomerization, charge transfer (CT) processes, and RTP emission.
• Prepared color-tunable doped RTP materials using calcium formate and CP-type guest components.

Main Results:

• Achieved a wide-range of RTP colors (505-612 nm) from cyan to red by altering CP packing structures.
• Demonstrated that IBU isomerization effectively tunes CT processes, leading to diverse RTP emissions.
• Observed excitation/concentration/time-dependent RTP emission in doped materials.

Conclusions:

• IBU isomerization engineering provides an effective method for facile RTP color regulation.
• CP-type guest components show great potential for developing doped RTP materials.
• The developed materials show promise for multi-level information encryption applications.