Research Article: 4-{2-[4-(Dimethyl­amino)­phen­yl]ethen­yl}-1-methyl­pyridinium 3,5-dicarb­oxy­benzene­sulfonate methanol monosolvate

Date Published: February 01, 2012

Publisher: International Union of Crystallography

Author(s): Liang Li, Huijuan Cui, Zhou Yang, Xutang Tao, Huai Yang.


In the crystal structure of the title solvated salt, C16H19N2+·C8H5O7S−·CH3OH, the anions and the methanol solvent mol­ecules are linked by O—H⋯O hydrogen bonds. The cations and anions are packed as alternate layers parallel to (11). The crystal structure is further stabilized by a π–π inter­action between the pyridinium and benzene rings of the cations, with a centroid–centroid distance of 3.5492 (4) Å.

Partial Text

The title compound was synthesized as part of our continuing research on the nonlinear optical properties of DAS (4-N,N-dimethyl­amino-4′-N′-methyl­stilbazolium) derivatives. For the synthesis, see: Okada et al. (1990 ▶). For background to non-linear optical materials, see: Bosshard et al. (1995 ▶); Nalwa & Miyata (1997 ▶); Yang, Mutter et al. (2007 ▶); Ruiz et al. (2006 ▶). For the effects of different substituents of benzene sulfonate on its non-linear optical properties, see: Okada et al. (2003 ▶); Yang, Wörle et al. (2007 ▶); Ogawa et al. (2008 ▶), Yang et al. (2005 ▶). For standard bond-lengths, see: Allen et al. (1987 ▶).