Figure 3.
Localized through-space intervalence charge transfer (IVCT) in the cofacial framework [Zn2(DPPTzTz)2(TDC)2]n where DPPTzTz represents 2,5-bis(4-(4-pyridynyl)phenyl)thiazolo[5,4-d]thiazole and H2TDC represents thiophene-2,5-dicarboxylic acid. Upon electrochemical reduction to the radical mixed-valence state (according to the EPR spectroelectrochemistry shown on bottom right), an IVCT interaction within TzTz dimers was evidenced by a characteristic NIR band in UV/Vis/NIR spectroelectrochemistry (bottom left). Reproduced with permission from the American Chemical Society [54]. (Online version in colour.)