Diversity-oriented synthesis of blue emissive nitrogen heterocycles and their conjugation with carbon nano-onions

Abstract

The search for new fluorescent molecules for possible applications as functional p-electron systems and their conjugation with different nanomaterials is nowadays of paramount importance to broaden the availability of materials with different properties. Herein we present a diversity-oriented approach to heterocyclic luminophores based on a multicomponent Ugi reaction followed by a Pd-mediated cascade sequence. The new molecules are coupled to carbon nano-onions, and hybrid systems represent the first example of blue emitters conjugated with these carbon nanoparticles.

Key words： carbon nano-onions; multicomponent reactions; blue emitters; fluorescence; isoquinolines

Acknowledgements

Istituto Italiano di Tecnologia and the University of Genova are gratefully acknowledged for financial support. S.G. acknowledges the COST Action CA 15107 “Multi-Functional Nano-Carbon Composite Materials Network (MultiComp)”. The authors wish to thank Prof. Luis Echegoyen (UTEP) for supervising V.M. in the synthesis of pristine CNOs.

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