Supramolecular aggregation in the 1 : 1 co-crystal formed between merocyanine dye and 3-nitrophenol, characterized as a hydrate

摘要

The title organic salt comprises a (E)-4-[2-(4-hydroxyphenyl)vinyl]-1-methylpyridinium cation, a 3-nitro-phenoxide anion and a solvent water molecule of crystallisation. The anions and water molecules aggregate to form supramolecular chains facilitated by charge-assisted O-H center dot center dot center dot O hydrogen bonds and these form layers which are interspersed by layers of cations. Interactions between layers include O-H center dot center dot center dot O hydrogen bonding, as well as C-H center dot center dot center dot O and C-H center dot center dot center dot pi contacts; pi center dot center dot center dot pi and C-H center dot center dot center dot O contacts are found within layers of cations. The compound crystallizes in the monoclinic space group P2(1) with a = 15.018(7) angstrom, b = 7.328(2) angstrom, c = 17.571(7) angstrom, beta = 112.342(15), and Z = 4.