A "Kite" Shaped Styryl End-Capped Benzo[2,1-b:3,4-b ']dithiophene with High Electrical Performances in Organic Thin Film Transistors

Ingenierie Moleculaire et Materiaux Fonctionnels, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), CNRS UPR 3118, Campus Luminy, Aix Marseille Universite, Marseille, France.
Journal of the American Chemical Society (Impact Factor: 12.11). 12/2008; 130(52):17681-3. DOI: 10.1021/ja807504k
Source: PubMed


The bridging of distyryl-bithiophene leads to a kite shape of the conjugated system. This twist is not like twistacenes or twist deformation in alpha-oligothiophenes but a curvature such as in bowl shaped systems. Initially perceived to be undesirable, this new semiconductor in OTFT devices provides excellent performances in air, mu = 0.1 cm(2)/V.s, I(on)/I(off) > 10(6), S < 4 V/decade, higher by a factor of 5 to the parent unbridged coplanar analogue.

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