Abstract
A push–pull dye with AIE polymorphism-dependent properties shows mechano-, thermo- and chrono-chromism associated with stimuli-induced surface structural defects.
Highlights
Organic materials that exhibit strong emission in the aggregated state have aroused much interest in recent years because of their potential applications in optical and optoelectronic devices such as light-emitting diodes,[1] optical waveguides[2] and optically pumped lasers.[3]
We have previously reported on the efficient Aggregation Induced Emission (AIE) properties of a series of ‘‘push–pull’’ dyes possessing common structural features: a trisubstituted ethylene core, decorated with two carboxylate esters and a 4-dialkylaminophenyl branch as the third substituent.18a Studying in detail one of the AIE active compounds using ultrafast pump–probe spectroscopy combined with calculations, we have given direct evidence that the restriction of the intramolecular rotation is the key process for switching on the AIE properties.[19]
We report the interesting emissive behavior of 1,1-dicyano-2,2-bis(4-dimethylaminophenyl)ethylene, 1, displaying AIE and structure dependent chromic properties
Summary
Organic materials that exhibit strong emission in the aggregated state have aroused much interest in recent years because of their potential applications in optical and optoelectronic devices such as light-emitting diodes,[1] optical waveguides[2] and optically pumped lasers.[3]. Further TDDFT calculations have been performed on 1 at the ground-state geometry optimized in toluene, by including triplet excitations in order to support the hypothesis of phosphorescence emission experimentally detected at low temperature.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
