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Yuan, Zhongyi; Ma, Yingjie; Gessner, Thomas; Li, Mengmeng; Chen, Long; Eustachi, Michael; Weitz, R. Thomas; Li, Chen and Müllen, Klaus (2016): Core-Fluorinated Naphthalene Diimides: Synthesis, Characterization, and Application in n-Type Organic Field-Effect Transistors. In: Organic Letters, Vol. 18, No. 3: pp. 456-459

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A series of difluoro- and tetrafluoro-substituted naphthalene diimides (NDIs) were synthesized by halogen exchange reactions of corresponding bromo-NDIs with CsF in dioxane. Two strong electron acceptor molecules 6 and 8 with low-lying LUMO energy levels of -4.27 and -4.54 eV were obtained, starting from tetrafluoro-NDI. Organic field-effect transistors (OFETs) based on these fluorinated NDIs were fabricated by vapor deposition, exhibiting n-channel field-effect character under ambient conditions with the highest mobility of 0.1 cm(2) V-1 s(-1).

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