Perylene tetracarboxydiimide

Owing to experimental difficulties, knowledge of aggregation effects in alkaline dithionite solutions of leuco vat dyes is sporadic [20,21]. Investigations based on absorption spectra have shown that, depending on concentration and temperature, planar polycyclic molecules such as the violanthrone derivatives Cl Vat Blues 19, 20 and 22 and the perylene tetracarboxydiimide derivatives Cl Vat Reds 23 and 32 are mainly present as monomers or dimers in leuco vat solutions. Violanthrones that do not have a coplanar structure because of the presence of... 

The RRE approach has successfolly been applied to extract stacking distances in a perylene tetracarboxydiimide derivative, Cgj-PDI [86]. The supramolecular arrangement of these PDI derivatives allows for ID electronic charge transport, an attractive property for the fabrication of nanoscale devices such as organic solar cells. 

Wasielewski s previous publication on 38 [93, 94] was the forerunner of the discussion concerning 37 [90]. The donor-acceptor molecule 38 was capable of a fast switch with potential logic capabilities. The two terminal porphyrin donor moieties could independently reduce the central perylene tetracarboxydiimide acceptor moiety via PET. When only one porphyrin was excited by a femtosecond laser pulse, the absorption due to the perylene tetracarboxydiimide radical anion was seen. If both porphyrins were excited simultaneously by a higher intensity laser pulse, two PET processes to the central acceptor could occur, giving a dianion with a different absorption band. 

Fig. 3.9. Four representative n-type OFET materials, (a), (b), and (c) achieve electron deficient carbon backbones through fluorination, although other electronegative groups may also be used, (a) Hexadecafluoro copper pthalocyanine [30], (b) a per-fluorinated pentacene [31], and (c) a fluorinated thiazole-based oligomer [32]. (d) C60 is also an electron transporting material which can form OFETs [33]. (e) is a perlyene derivative, perylene 3,4,9,10 tetracarboxydiimide, which has found wide application as an n-type material in organic solar cells. A large number of n-type perylene derivatives have been developed.

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