Terbium-Aspartic Acid Nanocrystals with Chirality-Dependent Tunable Fluorescent Properties

Area of Science:

• Materials Science
• Nanotechnology
• Biochemistry

Background:

• Terbium-aspartic acid (Tb-Asp) nanocrystals offer tunable fluorescent properties.
• Chirality of aspartic acid (Asp) influences coordination stability and fluorescence.

Purpose of the Study:

• To investigate the synthesis and chirality-dependent fluorescent properties of Tb-Asp nanocrystals.
• To explore the potential applications of these tunable fluorescent nanomaterials.

Main Methods:

• Facile synthesis via coordination between terbium (Tb) and aspartic acid (Asp).
• Utilizing aspartic acid with different chiralities (dextrorotation/d and levogyration/l) to tune fluorescence.
• Characterization of nanocrystal properties, including fluorescence quantum yield and lifetime.

Main Results:

• Dextrorotation (d)-Asp forms more stable Tb coordination centers, leading to higher quantum yield and longer fluorescence life compared to levogyration (l)-Asp.
• Fluorescence intensity of Tb-Asp nanocrystals shows a linear increase with the proportion of d-Asp.
• Tunable fluorescence properties achieved by adjusting the chiral ratio in mixed chirality Tb-Asp systems.

Conclusions:

• Tb-Asp nanocrystals possess advantageous properties like biocompatibility, small size, and long fluorescent life.
• Potential applications include low-cost anti-fake markers, advertisements, and use in polydimethylsiloxane molds.
• The facile, low-cost, high-yield, and green synthesis process offers significant advantages for nanomaterial technology.