Affiliation:
1. Laboratory of Molecular Materials and Devices Department of Materials Science Fudan University Shanghai 200433 P. R. China
2. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry Xiangtan University Xiangtan 411105 P. R. China
3. Department of Chemistry University of Cambridge Cambridge CB2 1EW UK
Abstract
AbstractA family of novel highly π‐extended tetracyano‐substituted acene diimides, named as tetracyanodiacenaphthoanthracene diimides (TCDADIs), have been synthesized using a facile four‐fold Knoevenagel condensation strategy. Unlike conventional cyano substitution reactions, our approach enables access to a large π‐conjugated backbone with the in‐situ formation of four cyano substitutents at room temperature while avoiding extra cyano‐functionalization reactions. TCDADIs decorated with different N‐alkyl substituents present good solubility, near‐coplanar backbones, good crystallinity, and low‐lying lowest unoccupied molecular orbital energies of −4.33 eV, all of which contribute to desirable electron‐transport performance when applied in organic field‐effect transistors (OFET). The highest electron mobility of an OFET based on a 2‐hexyldecyl‐substituted TCDADI single crystal reaches 12.6 cm2 V−1 s−1, which is not only among the highest values for the reported n‐type organic semiconductor materials (OSMs) but also exceeds that of most n‐type OSMs decorated with imide units.
Funder
Ministry of Science and Technology of the People's Republic of China
National Natural Science Foundation of China
Natural Science Foundation of Shanghai Municipality
Cited by
1 articles.
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