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Updated: Oct 15, 2025

Perspectives on Neuroscience

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Published on: July 31, 2007

More is different: how aggregation turns on the light.

¹Writes for NSR from London.

National Science Review

|October 25, 2021

Summary

This summary is machine-generated.

Aggregation-induced emission (AIE) is a phenomenon where molecules emit light when aggregated, contrary to concentration quenching. This surprising effect, observed in siloles, has spurred the new field of aggregate science.

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Published on: November 24, 2015

Area of Science:

Supramolecular chemistry
Materials science
Nanotechnology

Background:

Reductionist science focuses on individual components, but emergent properties arise in systems.
Biology and materials science show examples where system behavior is more than the sum of its parts.
Aggregation-induced emission (AIE) is a phenomenon where molecules emit light upon aggregation.

Purpose of the Study:

To explore the phenomenon of aggregation-induced emission (AIE).
To discuss the origins and potential applications of AIE and aggregate science.
To highlight the shift from reductionist approaches to understanding emergent properties in molecular systems.

Main Methods:

Observation of luminescent properties in aggregated silole molecules.
Comparison with traditional concentration quenching effects.
Review of historical observations and recent research in aggregate science.

Main Results:

Silole molecules exhibit luminescence in nanoscopic aggregates, unlike in dilute solutions.
AIE is a common effect, not a rarity as initially thought.
Aggregation can switch properties 'on', contrasting with 'switching off' in concentration quenching.

Conclusions:

AIE is a significant emergent property arising from molecular aggregation.
The study of AIE has led to the proposed field of 'aggregate science'.
Aggregate science bridges multiple disciplines and offers potential applications in technology and medicine.