In this study, we successfully anchored 2aminopyrene-3,4,9,10-tetraone (PYT-NH 2 ), a small organic molecule, onto graphene oxide (GO) and then further chemically reduced it to obtain PYT-NH 2 /reduced graphene oxide (rGO). We observed that, as an electrode material for high-performance supercapacitor application, PYT-NH 2 /rGO exhibited higher capability and smaller charge transfer resistance in comparison with PYT-NH 2 /GO, rGO, and PYT-NH 2 . The specific capacitances were measured as 326.6 and 229.2 F g −1 for PYT-NH 2 /rGO and PYT-NH 2 /GO, respectively, at a current density of 0.5 A g −1 in 1 M sulfuric acid (H 2 SO 4 ) electrolyte. In addition, we obtained the capacitance of 77.2 F g −1 for PYT-NH 2 /rGO//activated carbon (AC) at 0.5 A g −1 with an energy density of 15.4 W h kg −1 . Moreover, for the fabricated hybrid capacitor, the capacitance retention of 25 000 cycles was nearly 100% at 5 A g −1 , thus manifesting excellent electrochemical stability and signaling promising potential in energy storage applications.

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The first example of Pd-catalyzed carboxylation of propargylic alcohols in the presence of CO (1 atm) and water affording 2,3-allenoic acids has been developed.

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