Aggregate adjustable double-emission chiral carbon nanorideens were successfully developed

The research group of Professor Du Pingwu of the University of Science and Technology of China cooperated with the research group of Professor Yang Shangfeng to synthesize the first chiral bicyclic molecule with the property of aggregation tunable double emission. The results of the research were recently published in Nature Communications.

a) examples of traditional AIE emitters; b) Chiral bicyclic molecules with aggregated tunable bi-emission properties (SCPP[8]).png

a) examples of traditional AIE emitters; b) Chiral bicyclic molecules with aggregated tunable bi-emission properties (SCPP[8]Courtesy of the University of Science and Technology of China

“This new chiral molecule can emit fluorescence of different wavelengths in both aggregate and solution states, and by controlling the degree of aggregation and adjusting the proportion of the two emission peaks, a variety of colors of fluorescence emission are obtained.” Zhang Xinyu, a doctoral student in the Department of Materials Science and Engineering in the School of Chemistry and Materials Science, said the molecule can be applied in the fields of light sensors, 3D movies and videos, data storage and probes.

In conventional systems, aggregation-induced quenching emitters usually emit strong light in solution, but when aggregated, fluorescence is significantly attenuated or even completely disappeared. Another unique type of luminous body has the opposite photophysical phenomenon, which hardly emits light in solution, but can emit strong fluorescence when aggregated, and this luminous body is called aggregation-induced luminescent molecules.

This also means that the vast majority of current lumineves have a single emission property, emitting light only in solution, or only in the aggregate state. Dual-emission organic materials with both aggregation-induced luminescence and aggregation-induced quenching effects are rarely reported in the literature.

Based on the previous research work, the collaborative research team successfully synthesized the first chiral organic bicyclic molecule with aggregated tunable emission properties by fixing 1,2,4,5-tetraphenylbenzene with a p-benzene support unit with aggregation induced emission activity, called SCPP[8]。

In addition, the team studied SCPP in a mixture of tetrahydrofurans and water containing different volumes of water[8]Fluorescence phenomenon. SCPP[8]Exhibiting unexpected multicolor fluorescence emission, single molecule near-white light emission, stable intrinsic chirality and enhanced circularly polarized luminescence properties, it will have potential applications in aggregation-induced emission sensors, white light emitter devices, and chiral materials.

The reviewers believe that the new nanorangles exhibit both surprising photophysical phenomena and excellent circularly polarized luminescence properties. This is an interesting and unusual discovery, with excellent photophysical properties that give it potential value for technical applications. (Source: China Science Daily Wang Min)

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