Fig. 1: The preparation and characterization.

a Schematic of the synthesis of MCOF-Ti6Cu3 via the condensation of Ti6 and Cu3. b IR spectra of MCOF-Ti6Cu3, Ti6 and Cu3. c Experimental and simulated PXRD patterns of MCOF-Ti6Cu3. d Top and e side views of the structure of MCOF-Ti6Cu3. Atomic color: Carbon (gray), Nitrogen (blue), Oxygen (red), Copper (orange), Titanium (silver) and Hydrogen (white) f N2 adsorption curve of MCOF-Ti6Cu3 at 77 K (inset shows the pore-size distribution profile).