Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 141, Issue 8, Pages 3589-3596Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b12671
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Funding
- Research Grants Council of Hong Kong [GRF 14300217]
- University Grants Committee of Hong Kong [AoE/P-03/08]
- Natural Science Foundation of China [21473071]
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Herein we report the synthesis, crystal structures, and semiconductor properties of new derivatives of bisnaphtho-[2',3':3,4]cyclobut[1,2-b:1',2'-i]anthracene (BNCBA). It is found that the pi-pi stacking of BNCBA in single crystals can be largely modified by alkyl substituting groups of different lengths. In particular, the tetrahexyl derivative exhibits pi-pi stacking with an unusual zigzag arrangement. The variation of molecular packing also leads to a change in charge transport characteristics as found from the theoretical calculation of mobility on the basis of single-crystal structures. All of these BNCBA derivatives function as p-type semiconductors in solution-processed thin film transistors, and the tetrahexyl derivative exhibits a field effect mobility as high as 2.9 cm(2)/(V s).
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