Microwave-assisted synthesis of a new fluorinated Biphenyl-Schiff base with potential application in nonlinear optical / Síntese assistida por micro-ondas de uma nova Bifenil-Base de Schiff Fluorada com potencial aplicação em óptica não linear

Daniela Corrêa Santos, Marcos Antonio de Abreu Lopes Junior, Diego Fernando da Silva Paschoal, Andréa Luzia Ferreira de Souza


The new fluorinated Biphenyl-Schiff Base 3 was synthesized by a synthetic route involving three steps, with the formation of two intermediates precursors. Primarily by the result of a Suzuki-Miyaura cross-coupling reaction forming the fluorinated 4-aminobiphenyl (1) and later by the result of the nucleophilic substitution SN2 obtaining the intermediate 4-[2-(dimethylamino)ethoxy]-benzaldehyde (2). The Schiff base 3 was obtained through the condensation reaction between intermediates 1 and 2. The methodology involving the reaction to form intermediate 2 proved to be more effective when aided by microwave irradiation providing a significantly higher yield in a shorter time. The GC-MS showed that all compounds were synthesized by the proximity of the calculated m/z ratio and that found. In addition, theoretical calculations showed that the new fluorinated Biphenyl-Schiff Base 3 obtained a value for the first hyperpolarizability ( of 45.1 x 10-30 esu that is approximately five times greater than the experimental value of 9.2 x 10-30 esu for the reference compound (p-nitroaniline).


Schiff Base, Biphenyl, Nonlinear Optical Properties, First Hyperpolarizability, Suzuki-Miyaura, Microwave.


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DOI: https://doi.org/10.34117/bjdv7n6-577


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