Nonlinear optical organic co-crystals of merocyanine dyes and phenolic derivatives with short hydrogen bonds was written by Bosshard, Christian;Pan, Feng;Wong, Man Shing;Manetta, Sabine;Spreiter, Rolf;Cai, Chengzhi;Gunter, Peter;Gramlich, Volker. And the article was included in Chemical Physics in 1999.HPLC of Formula: 60463-12-9 This article mentions the following:
We investigated the co-crystallization of merocyanine dyes M (M : RN+C5H4CH:CHC6H4O–, M1: R = Me, M2: R = HOCH2CH2) with phenolic and aniline derivatives and show that the short or very short hydrogen bond between the two phenolic oxygen atoms which lead to a self-assembly of the M dyes and phenol derivatives is the key steering force for the cocrystn. process. The cocrystal formation was studied by m.p. determination, by second-harmonic generation using the Kurtz and Perry powder test, and X-ray structural anal. We present detailed results on the growth, polymorphism, and nonlinear optical properties of cocrystals of derivatives of M1 (M2) and m-nitrophenol (mNP) and cocrystals of M2 and Me 2,4-dihydroxybenzoate (MDB). Three phases of the cocrystal M2·mNP and three phases of the cocrystal M2·MDB were found. Both M2·MDB(I) and (II) have the same crystal structure (space group symmetry Cc determined by X-ray diffraction), but show different linear and nonlinear optical properties. This unusual property in the co-crystals of M2·MDB(I) and (II) may be caused by a different proton location of the short hydrogen bond (O-H-O) in the aggregation between M2 and MDB which could not be resolved by X-ray diffraction. In the experiment, the researchers used many compounds, for example, 3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9HPLC of Formula: 60463-12-9).
3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.HPLC of Formula: 60463-12-9
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