title: Parent and trisubstituted triazacoronenes: synthesis, crystal structure and physicochemical properties.
abstract: A four-step synthesis of the C3-symmetric parent 1,5,9-triazacoronene (TAC) and its derivatives was achieved using a three-fold Bischler-Napieralski cyclization as the key step. The single-crystal X-ray diffraction of 1b (R = n-Bu) demonstrates that the azacoronene core is perfectly co-planar and the molecules adopt a favorable 2-D "brick-wall" arrangement with strong π-π interactions. The unique stacking, tunable photophysical and electronic properties, and high thermal stability should make them promising candidates for emissive and electron-transport materials.
authors.affiliation: Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, China. qttan@shu.edu.cn xubin@shu.edu.cn.
authors.forename: Qitao
authors.initials: Q
authors.lastname: Tan
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Chen
authors.forename: Huaida
authors.initials: H
authors.lastname: Xia
authors.forename: Bingxin
authors.initials: B
authors.lastname: Liu
authors.forename: Bin
authors.initials: B
authors.lastname: Xu