Morphology-Dependent Ullmann C-O Arylation Using Cu₂O Nanocrystals

Figure 2

The UV-visible spectra of the Cu-oxide (2.5 mg/9 ml water) of (a) perfect cubic (PC), (b) octahedral (Oct), (c) rhombic dodecahedral (RD), (d) truncated cubic (TC), and (e) fluffy spherical (FS), structures, as well as a table indicating the apparent band gap energy .

(a)

(b)

(c)

(d)

(e)