Synthesis and Characterization of Polysubstituted Dibenzopyrenes as Charge-Transporting Materials.
A new class of benzopyrene-based semiconducting molecules is prepared and characterized. A four-step protocol involving Suzuki coupling and aromatic dehydrogenation reactions renders the new unsymmetrical framework. Introduction of various substituents at the dibenzopyrene framework modulates mainly the optoelectronic properties rather than the packing motif. Single-crystal field-effect transistors fabricated from these materials show a mobility ranging from 0.7 to 3.2 cm2/(V s). The highest mobility, 3.2 cm2/(V s), with an on/off ratio of 104-105was achieved for 11-methoxy-8-(4-methoxyphenyl)dibenzo[a,e]pyrene.
Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
Sushil
S
Kumar
Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
Man-Tzu
MT
Ho
Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
Yu-Tai
YT
Tao