[摘要]：72, 73, 77 The concept of cyanine has been successfully extended to an anionic heptamethine dye featuring tricyanofuran moieties in terms of structure, reactivity, and photophys. properties. Importantly, absorption and emission are red-shifted compared to its classical cationic analog without any cost in terms of thermal stability. In addn. to its "cyanine" behavior, this mol. exhibits further redox properties: oxidn. and redn. led to the reversible formation of radical species whose absorption is in marked contrast with that of cyanines.
