title: 4-{2-[4-(Dimethyl-amino)-phen-yl]ethen-yl}-1-methyl-pyridinium 4-nitro-benzene-sulfonate.
abstract: The asymmetric unit of the title salt, C(16)H(19)N(2) (+). C(6)H(4)NO(5)S(-), consists of two cations and two anions. The crystal structure is stabilized by π-π inter-actions between the pyridyl and phenyl rings of the cations, with a centroid-centroid distance of 3.7323 (6) Å.
authors.affiliation: Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083,  People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.forename: Yiqiang
authors.initials: Y
authors.lastname: Dai
authors.forename: Yun
authors.initials: Y
authors.lastname: Jin
authors.forename: Huai
authors.initials: H
authors.lastname: Yang
authors.forename: Zhou
authors.initials: Z
authors.lastname: Yang