This article introduces microwave synthesis of a serial N→B bond containing heterocyclic fluorescent compounds from boric acid, tetraphenylborate and fluorophenyl borate. IR, UV, fluorescence, element analysis, XRD was performed to characterize those compounds. Compared with traditional solution method, microwave method is quicker, more efficient and evenly heated. Optimum conditions of microwave synthesis are obtained after rounds of variable experiments, in which the above mentioned compounds were synthesized massively and efficiently.
Under appropriate microwave conditions, compound 1, with salicylaldehyde, propylamine, boric acid as substrates, was synthesized massively through one-pot method in acetonitrile. In UV irradiation blue fluorescence generates.
Under appropriate microwave conditions, compound 7 and 8, with salicylaldehyde, ethanolamine, benzene boric acid or boric acid fluorophenyl as substrates, were synthesized massively through one-pot method in acetonitrile. With solution diffusion method compound 7 and 8 were crystallized, whose crystal structure were characterized, and ion discern was researched, which indicates good discern of one valence ion by fluorine containing dual-core alcohol amine borate.
In recent years, previous light-emitting borate compound only discern substrates with many complex group, for example, carbohydrate and polyols, instead of ions discern, which are of great importance. So ion discern of borate esters were performed.
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