Video Experimental Relacionado

Updated: Jan 31, 2026

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Control de la emisión inducida por agregación mediante efectos estéricos en hélices moleculares tipo

Nico Groß¹, Bojan Tanović¹, Frank Hampel¹

¹Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.

Chemistry (Weinheim an der Bergstrasse, Germany)

|January 30, 2026

Abstract:

The phenomenon of aggregation-induced emission (AIE) serves as a promising tool to harness and boost emission properties in luminescent materials. Here, we report nitrogen-boron-nitrogen (NBN)-substituted molecular propellers with different degrees of steric hindrance. Photoluminescence measurements demonstrated that each compound presents AIE behavior in THF/water mixtures, where the less sterically hindered derivative was characterized by higher emission enhancement due to a more pronounced restriction of intramolecular rotations (RIR). A less common maximum behavior was observed upon further addition of water, and this became more pronounced for the more hindered derivative driven by stronger intermolecular electronic effects. Steric hindrance thus serves as an effective design tool to enhance maximum AIE behavior in molecular propellers and gain more precise solvent control.

Palabras clave:

emisión inducida por agregación extinción inducida por agregación comportamiento máximo hélices moleculares tetrafeniletileno dopado con nitrógeno-boro-nitrógeno

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