Yanhong Miao
2014
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Abstract
Indole-2,3-dione is a compound found in Strobilanthes cusia (Nees) Kuntze and many other plants such as genus Isatis, Calanthe discolour Lindl., Couroupita guianensis Aubl. and in mammalian tissue. It displays versatile bioactivity and it is used to synthesize a large variety of heterocyclic compounds in preparing drugs. Indole-2,3-dione Mannich bases are reported to have antibacterial activities. Compounds, containing functional electronegative groups and p and/or π-electron in triple or conjugated double bonds, are found to be efficient as inhibitors against metal corrosion. It has been commonly recognized that an organic inhibitor usually promotes formation of a chelate on a metal surface, by transferring p and/or π-electrons from the organic compounds to the metal and forming a coordinate covalent bond during the chemical adsorption. Organic compounds, containing heteroatoms, such as sulfur, phosphorus, nitrogen and oxygen, together with aromatic rings in their structure are the major adsorption centers and the Schiff bases, a condensation product of an amine and a ketone/aldehyde, are such typical molecules. Some polydentate Schiff base compounds have been reported as effective corrosion inhibitors for various metals in acid media. Several indole-2,3-dione derivatives have been reported as inhibitors in HCl solution. The aim of this work is to screen the inhibitory action of 1-(morpholinomethyl)indoline-2,3-dione for the corrosion of mild steel both in high concentrated HCl solution and microbiologically influenced corrosion. Structure, Anticorrosion and Antibacterial Evaluation of 1-(Morpholinomethyl)indoline-2,3-dione