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Abstract
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Carboxyl functionalized graphene quantum dots (CGQDs) were applied as a highly efficient and green
acidic catalyst for the coupling reaction of 2-naphthole and benzaldehyde derivatives for the preparation
of 14H-dibenzo xanthene derivatives, under solvent-free microwave irradiation conditions. The
structures of the 14H-dibenzo xanthene derivatives were confirmed by FT-IR, 1H-NMR and 13C-NMR
spectroscopic techniques. The structure of catalyst was also confirmed by FT-IR, XRD, TEM and PL
techniques. In order to demonstrate the positive impact of the CGQDs catalyst, the reaction times and
yields of the products were compared with similar products which have been reported previously. 14HDibenzo
xanthene derivatives were synthesized in a simple procedure with good to excellent yields.
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