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Influence of intermolecular N-H...pi interactions on molecular packing and field-effect performance of organic
Huaping Zhao1, Lang Jiang, Huanli Dong
1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China.
Abstract:
Charge transport in organic semiconductors is strongly dependent on their molecular packing modes in the solid state. Therefore, understanding the relationship between molecular packing and charge transport is imperative, both experimentally and theoretically. However, so far, the fundamental effects of solid-state packing and molecular interactions (e.g. N-H...pi) on charge transport need further elucidation. Herein, indolo[3,2-b]carbazole (ICZ) and a derivative thereof are used as examples to approach this scientific target. An interesting insight obtained thereby is that N-H...pi interactions among ICZ molecules facilitate charge transport for higher mobility. Subtle changes in the of N-H...pi interactions can significantly influence both the molecular packing and the charge-transport properties. Therefore, a method for exploiting intermolecular N-H...pi interactions would yield novel molecular systems with designable characteristics.
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