synthesis, luminescence ,Absorption , Corrosion properties and Study of ionic Conductance in Solution for a (4-hydroxy-3- Amino-1,8- Naphthalic Anhydride)

Abstract

         In this paper, the compound of (4-hydroxy-3-amino-1,8-naphthalic anhydride) and the dopant material (4-hydroxy-m-benzene-disulfonic acid) were synthesized. The UV- Vis absorption and fluorescence spectra of the compound were recorded, the compound 4- hydroxy-m- benzene-disulfonic acid was synthesized, the compound was characterized by the FT-IR  spectroscopy. The absorption band is sensitive to the polarity of the solvent, for example in 1-butanol, showing only a slight red shift from 338 nm in 1-butanol to 340 nm in DMSO (  = 2 nm). The fluorescence spectra of this compound were sensitive to the polarity of the solvent, the compound showed a structured emission band displaying a slight red-shift from 375 nm in ethanol to 378 nm in DMSO, upon increasing the polarity of the solvent (  = 3 nm). The effect of the dopant material on the conductivities (ionic and specific) of the compound was studied, the ionic conductance was increased as the weight of the dopant material increases. The bathochromic shifts in absorption due to the polarity of the solvent were observed, for example, in ethanol, the compound had a λmax value at 338 nm and a red shift for the polar solvent at 340 nm, in DMSO solvent. The fluorescence was showed ca. 6 nm red shift on moving from 1-butanol to DMSO. Evaluation of the synthesized compound as corrosion inhibitors for carbon steel alloy C1010. (4-hydroxy -3- amino -1,8-naphthalic anhydride) as anti-corrosion agents for the C1010 alloy of carbon steel was studied.