and hence full decomposition of this species. Also the low BE component (NTFSI,dec-2, yellow), which as stated above may also contain now some BMP decomposition product, loses significantly in intensity due to desorption of reaction products. Obviously, both BMP-and TFSI-related reaction products have further reacted into species that are volatile at these temperatures. The considerable desorption of BMP-TFSI related species is indicated also by the appearance of the graphite related C1s peak at 284.6 eV. Hence, at this point the system starts to resemble the monolayer system rather than bulk BMP-TFSI. Finally, upon annealing to 700 K, the low-BE peak has decayed further in intensity, indicative of ongoing desorption of volatile reaction products of the TFSI-and BMP-related reaction products. It also shifts to slightly higher BE, which may either be due to direct interaction with the graphite substrate, or caused by dominant desorption of TFSI reaction products (NTFSI-2, yellow), leaving only decomposition products of the BMPdec-1 species on the surface, or vice versa. From the small shift in BE alone, however, we cannot distinguish between these possibilities.