Kinetic-Programmed Hydrolysis Enables Intelligent Time-Evolving Phosphorescence in Water.

Area of Science:

• Materials Science
• Nanotechnology
• Photochemistry

Background:

• Developing aqueous room-temperature phosphorescent (RTP) materials with controllable afterglow is challenging.
• Existing methods often lack dynamic programmability or stability in aqueous environments.

Purpose of the Study:

• To introduce a universal synthesis paradigm for programmable aqueous RTP materials.
• To achieve dynamic control over phosphorescence properties for novel applications.

Main Methods:

• Orchestrating aminosilane hydrolysis kinetics to synthesize silylated carbon dots (Si-CDs).
• Covalently locking dual-emission centers within a rigid silica matrix.
• Utilizing aminosilane as a multifunctional building block (carbon source, electron donor, molecular bridge).

Main Results:

• Synthesized ultra-small nanoparticles (7-9 nm) with exceptional aqueous RTP performance (859 ms lifetime, 29.3% quantum yield).
• Pioneered programmable time-dependent phosphorescence (TDP) with dynamic color evolution (red to blue).
• Demonstrated potential in autofluorescence-free in vivo bioimaging, anti-counterfeiting, and 3D data encryption.

Conclusions:

• The developed synthesis paradigm offers a versatile platform for designing intelligent photonic nanomaterials.
• Programmable TDP via kinetic control opens new avenues for optical information security.
• The Si-CDs exhibit significant potential for advanced bioimaging and anti-counterfeiting technologies.