Preparation method of 4-(4-dimethylaminostyryl)methylpyridyl p-toluenesulfonate

Abstract

The invention belongs to the technical field of functional material preparation, and relates to a preparation method of 4-(4-dimethylaminostyryl)methylpyridyl p-toluenesulfonate, which comprises the steps of synthetic reaction, condensation reaction, silver p-toluenesulfonate, exchange reaction and purification by filtration. The method specifically comprises the following steps: dissolving 4-methylpyridine and iodomethane in ethanol to carry out reaction, thereby generating 4-methylpyridinium iodide; dissolving 4-methylpyridinium iodide and p-dimethylaminobenzaldehyde in methanol, and adding a catalyst to react, thereby generating 4-(4-dimethylaminostyryl)methylpyridyl iodide; reacting p-toluenesulfonic acid and silver oxide to generate silver p-toluenesulfonate; reacting the silver p-toluenesulfonate and 4-(4-dimethylaminostyryl)methylpyridyl iodide to generate silver iodide and 4-(4-dimethylaminostyryl)methylpyridyl p-toluenesulfonate; and purifying by filtration. The invention has the advantages of simple preparation technique, reliable principle, low preparation cost, high product purity, mild reaction conditions, high yield and environment friendliness.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of functional materials, and relates to a preparation method of nonlinear optical material 4-(4-dimethylaminostyryl)picoline p-toluenesulfonate, which is used for the preparation of high-quality nonlinear crystal materials , to realize the synthesis and purification of high-purity 4-(4-dimethylaminostyryl)picoline p-toluenesulfonate. Background technique: [0002] At present, the commonly used 4-(4-dimethylaminostyryl)picoline p-toluenesulfonate is an ionic crystal material with a high nonlinear coefficient and can be used as a nonlinear optical material with good performance. It can also be used as a terahertz wave THz source in THz radiation, and THz waves are generated by optical rectification; terahertz waves are commonly referred to as THz waves, which refer to electromagnetic waves with a wavelength of 0.1-10THz and a wavelength of 30um-3mm, which belong to the far-infrared band; 4-( 4...

AI Technical Summary

Problems solved by technology

4-(4-Dimethylaminostyryl)picoline p-toluenesulfonate crystal is an organic salt crystal formed by strong Coulomb force. Its cation contains a benzene ring and a pyridine ring. It is a conjugated Hyperconjugated ions with large π bonds belong to monoclinic crystals, the point group is m, the space group is Cc, and its unit cell parameters are: α=90°, β=92.24°, γ=90°, Z=4; the preparation process of the existing high-purity 4-(4-dimethylaminostyryl)picoline p-toluenesulfonate has relatively Multiple by-products are generated, the purification process is complicated, the preparation cost is high, and the yield is low, which limits the preparation of high-quality nonlinear crystal materials. Therefore, it is sought to design a 4-(4) with low cost, mild reaction conditions, high yield and simple purification. The preparation method of -dimethylaminostyryl) picoline p-toluenesulfonate has good practical significance and economic value

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