Surface tension investigation of ternary system: Copper surfactants - 2-amino-6-chloro benzothiazole complex, benzene and methanol at 311 K

Abstract

Colloidal and micellar characterization of Cu (II) soap complex solutions in benzene + methanol mixture has been studied and analysed by measuring density and surface tension parameters. This study confirms that CMC values depend upon solvent mixture composition and it is observed that CMC decrease with increase in chain length of copper surfactant (caprylate, caprate and laurate). It has also been affected by the polarity of the solvents as non- polar benzene and polar methanol were taken to analyze this effect. Szyszkowski’s empirical equation has been successfully applied to our referred system and it is found that the change in the behaviour of copper surfactant complex carried out at definite concentrations in different compositions of solvent mixture. It is also observed that the parachore of soaps solution increases with the mole fraction of the copper surfactant complex. The results show that there is justification in applying Hammic and Andrew’s equation to these complex solutions in benzene methanol mixtures.A new series of Substituted-4-Biphenyl acetamides have been synthesized by condensation of 4-Biphenyl acetic acid with different primary amines (aromatic and aliphatic). 4-Biphenyl Acetic Acid was first treated with Thionyl Chloride in dry benzene to prepare substituted-4-biphenyl acetyl chloride, which is then treated with different aliphatic or aromatic amines to various substituted-4-biphenyl Acid-amide derivatives. The Structure of newly synthesized compounds has been established by analytical and spectral methods. These all six biphenyl compounds were screened for synthesize antimicrobial activity. All compounds at different concentrations were analyzed for antifungal activity via disc diffusion method. The antimicrobial activity was screened against fungus Curvalaria lunata. All six compounds showed moderate to good activity against selected fungal strain. These synthesized compounds have shown Anti-fungal properties when they tested against Curvalaria lunata.