A novel azo compound derived from ethyl-4-amino benzoate: synthesis, nonlinear optical properties and DFT investigations

Abstract

A novel azo dye compound, Ethyl (E)-4-((5-hydroxy-3,4-bis(hydroxyl methyl)-6-methylpyridin-2-yl)diazenyl)benzoate (EAB), have been synthesized by the coupling reaction and characterized by FT-IR, 1H- and 13C-NMR, Mass, and UV-visible spectroscopies. The nonlinear optical (NLO) properties of the EAB compound via the finding of the nonlinear refractive index (NRI) using continuous wave (cw), low power 473 nm, TEM00 mode laser beam have been studied via the diffraction patterns (DPs) and the Z-scan. Effect of power input of the laser beam, types of beam wavefront and temporal variation of the DPs are discussed. The all-optical switching (AOS) using two laser beams is proved to occur in this compound.

A novel azo compound derived from ethyl-4-amino benzoate: synthesis, nonlinear optical properties and DFT investigations

“…NLO properties of EAB compound have been studied by calculating some chemical global reactivity descriptors (CGRDs) and using urea compound as a reference [49]. The CGRDs calculations are an important way to examine the NLO properties for molecules, such as HOMO energy, electron affinity (EA), global softness (Ѕ), and absolute softness (σ).…”

“…Recently, vast number of researchers are interested in finding and/or preparing systems of high quality that behave nonlinearly towards laser light beams since the index of refraction becomes intensity dependent as it is exposed to electric field of high values. The laser beam interaction with nonlinear materials leads to variety of effects in the transverse dimensions viz., self-focusing (SF) and defocusing (SDF), spatial ring formation, self-phase modulation, etc., [1][2][3][4][5][6][7][8][9][10][11]. Materials having high nonlinear optical (NLO) third-order properties and ultra-fast response time led to considerable scientific activities for their potential applications viz., optical computing, optical phase conjugation, all-optical switching (AOS), holography, spatial dark soliton transmission, optical power limiting, harmonic generation [12][13][14][15][16][17][18][19][20][21][22][23][24][25] etc.…”