abstract
A simple synthesis strategy afforded a family of hydrogen-bonded azines and Schiff-bases. Although in dilute solution these dyes are faint light emitters, all exhibit bright luminescence upon aggregation. Changing the peripheral substituents from electron donating to electron withdrawing allows emission fine-tuning in a range from bluish-green to orange-red. The crystal structures of the materials reveal that the restriction of intramolecular rotations is the main mechanism for the aggregation-induced emission enhancement properties.
keywords
LUMINESCENCE; DERIVATIVES; PROBE
subject category
Chemistry
authors
Guieu, S; Cardona, F; Rocha, J; Silva, AMS
our authors
João Rocha
Full Professor
Samuel Jacques André Guieu
Junior Researcheracknowledgements
Thanks are due to University of Aveiro, FCT/MEC for the financial support to the QOPNA research Unit (FCT UID/QUI/00062/2013) and CICECO-Aveiro Institute of Materials (POCI-01-0145-FEDER-007679; FCT-UID/CTM/50011/2013), through national funds and where applicable co-financed by the FEDER, within the PT2020 Partnership Agreement, and also to the Portuguese NMR Network. S.G. also thanks the FCT for his postdoctoral grant (SFRH/BPD/70702/2010), the pAge project: Life-long protein aggregation (Centro-01-0145-FEDER-000003) and acknowledges the financial support from the European Union Framework Programme for Research and Innovation HORIZON 2020, under the TEAMING Grant agreement No. 739572-The Discoveries CTR.