Phosphole modified pentathienoacene: synthesis, electronic properties and self-assembly.
A series of new ladder π-conjugated materials, phosphole modified pentathienoacene (PO-PTA), are synthesized and characterized. Single-crystal X-ray results demonstrate that methyl-disubstituted PO-PTA forms a face-to-face dimer structure driven by π-π interactions. The investigations of optical properties showed that the oxidized phosphole moiety in this ladder system can effectively narrow the band gap. PO-PTA is a promising building block in π-conjugated polymers and oligomers for optoelectronic applications. The derivative of PO-PTA, obtained by introducing four long alkyl chains, can self-assemble into one-dimensional (1D) fibers based on intermolecular π-π interactions, dipole-dipole interactions and van der Waals interactions. Interestingly, the uniform and well-ordered monolayers were also obtained for PO-PTA derivative on a HOPG (highly oriented pyrolytic graphite) surface.
Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 310012, PR China. wan_junhua@hznu.edu.cn
Jun-Hua
JH
Wan
Wei-Fen
WF
Fang
Yi-Bao
YB
Li
Xu-Qiong
XQ
Xiao
Li-Hong
LH
Zhang
Zheng
Z
Xu
Jia-Jian
JJ
Peng
Guo-Qiao
GQ
Lai
D018360:Crystallography, X-Ray; D006108:Graphite / Q000737:chemistry; D018625:Microscopy, Atomic Force; D011108:Polymers / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013876:Thiophenes / Q000737:chemistry*; D014173:Transistors, Electronic
D011108:Polymers; D013876:Thiophenes; D006108:Graphite