Synthesis and properties of naphthobisbenzo[b]thiophenes: structural curvature of higher acene frameworks for solubility enhancement and high-order orientation in crystalline states
摘要:
The syntheses of naphtho[2,3-b:7,6-b']- and naphtho[2,1-b:5,6-b']bisbenzo[b]thiophenes (NBBTs) are achieved via inter- and intramolecular stepwise Friedel-Crafts-type reactions. The structural curvature of these NBBTs are found to improve their solubility in organic solvents, and to form well-defined herringbone structures in single crystals, especially when the C-2v symmetrical naphtho[2,3-b:7,6-b']bisbenzo[b]thiophene takes the form of asymmetric space groups in a parallel direction with each other, and having exhibited OFET characteristics with a hole mobility of 7 x 10(-5) cm(2) V-1 s(-1). (C) 2012 Elsevier Ltd. All rights reserved.
A novel organic compound with favorable thermophysical properties is provided. An organic compound represented by General Formula (G1) is provided. At least one of X
1
to X
5
is a secondary or tertiary alkyl group having 3 to 6 carbon atoms in which a carbon atom bonded to a phenyl group branches. Each of R
1
to R
7
is independently any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and an unsubstituted or alkyl-substituted aryl group having 6 to 13 carbon atoms. Ar
1
represents a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more aromatic rings, and Ar
2
represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Furthermore, n is any of 1 to 3.
A novel organic compound represented by General Formula (G1) is provided. In General Formula (G1), X
1
and X
2
each independently represent a secondary or tertiary alkyl group having 3 to 6 carbon atoms and having a branched carbon atom which is bonded to a phenyl group. In addition, Ar
1
represents a substituted or unsubstituted condensed aromatic ring skeleton having 10 to 60 carbon atoms and composed of two or more rings or a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more rings. Furthermore, Ar
2
represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Moreover, n represents any of 1 to 3, and in the case where n is 2 or more, two or more groups bonded to Ar
1
may be identical or different.