Synthesis, Growth and Spectroscopic Studies of Marine Dye Non-linear Optical Material: Disodium 4-Amino-3-[(E)-2-(4-{4-[(E)-2-(1-amino-4-sulfonatonaphthalen- 2-yl)diazen-1-yl]phenyl}phenyl)diazen-1-yl]naphthalene-1-sulfonate

Abstract

The marine compound disodium 4-amino-3-[(E)-2-(4-{4-[(E)-2-(1-amino-4-sulfonatonaphthalen-2-yl) diazen-1-yl]phenyl}phenyl)diazen-1-yl] naphthalene-1-sulfonate (Congo red) like crystals as a marine dye was synthesized by taking disodium 4-amino-3-[(E)-2-(4-{4-[(E)-2-(1-amino- 4-sulfonatonaphthalen-2-yl) reacted with Diazen-1-yl]phenyl}phenyl)diazen-1-yl] and naphthalene-1-sulfonate are used to synthesized marine dye (C₃₂H₂₂N₆O₆S₂Na₂). It is soluble in water. Powder crystals of disodium 4-amino-3-[(E)-2-(4-{4-[(E)-2-(1-amino-4-sulfonatonaphthalen-2-yl) diazen-1-yl]phenyl}phenyl) diazen-1-yl] naphthalene-1-sulfonate (Congo red) were grown by solution method with slow evaporation technique. The grown crystals were characterized by single crystal X-ray diffraction (XRD) analysis, FTIR studies and UVvisible transmittance studies and the non-linear optical (NLO) activity of the grown crystal has been checked by second harmonic generation test.