title: Dianthraceno[a,e]pentalenes: synthesis, crystallographic structures and applications in organic field-effect transistors.
abstract: Two soluble and stable dianthraceno[a,e]pentalenes with two (DAP1) and six (DAP2) phenyl substituents were synthesized. Both compounds possess a small energy band gap and show amphoteric redox behaviour due to intramolecular donor-accepter interactions. X-ray crystallographic analysis revealed that DAP2 has a closely packed structure with multi-dimensional [C-H···π] interactions although there are no π-π interactions between the dianthraceno[a,e]pentalene cores. As a result, solution-processed field effect transistors based on DAP2 exhibited an average hole mobility of 0.65 cm(2) V(-1) s(-1). Under similar conditions, DAP1 showed an average field effect hole mobility of 0.001 cm(2) V(-1) s(-1).
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore. chmcc@nus.edu.sg.
authors.forename: Gaole
authors.initials: G
authors.lastname: Dai
authors.forename: Jingjing
authors.initials: J
authors.lastname: Chang
authors.forename: Wenhua
authors.initials: W
authors.lastname: Zhang
authors.forename: Shiqiang
authors.initials: S
authors.lastname: Bai
authors.forename: Kuo-Wei
authors.initials: KW
authors.lastname: Huang
authors.forename: Jianwei
authors.initials: J
authors.lastname: Xu
authors.forename: Chunyan
authors.initials: C
authors.lastname: Chi