Adsorption of Chicago Sky Blue on the Langmuir Monolayer and Langmuir-Blodgett Films of Octadecylamine

• Published in: Journal of macromolecular science. Part A, Pure and applied chemistry Vol. 48; no. 8; pp. 619 - 624
• Main Authors: Pal, Ajitesh, Mishra, Bijay Kumar, Panigrahi, Simanchalo, Nath, Ranendu Kumar, Deb, Subrata
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 01-08-2011; Taylor & Francis
• Subjects: absorption spectroscopy; aggregate; Cationic; Chains; Chemistry; CSB; Dyes; Exact sciences and technology; General and physical chemistry; Inhibitors; Langmuir blodgett films; Monolayers; SEM; Sky; Surface chemistry; Surface physical chemistry; surface pressure vs. area isotherms; Monolayer; Incorporation; Amino group; Film; area isotherms; Amine; CSB; Langmuir Blodgett layer; Scanning electron microscopy; Organic dye; Electrostatic interaction; Retroviridae; Strong interaction; Lentivirus; Langmuir layer; Virus; Adsorption; absorption spectroscopy; Isotherm; Surface pressure; Inhibitor; SEM; Kinetics; Human immunodeficiency virus; Aggregate; surface pressure vs
• ISSN: 1060-1325; 1520-5738
• DOI: 10.1080/15226514.2011.586276

This paper reports the incorporation of an inhibitor of Human Immunodeficiency Virus (HIV), viz. Chicago Sky Blue (CSB) dye within an insoluble cationic octadecylamine (ODA) Langmuir monolayer. A surface pressure-area isotherm study confirmed the strong interaction between long chain amine and CSB dye. At higher surface pressure, CSB molecules tend to squeeze out from the octadecylamine monolayer. SEM study confirms this observation. Adsorption kinetics shows that the amount of dye adsorbed depends on the concentration of the dye present in the subphase. It was observed that the absorption process mainly occurred due to the electrostatic interaction between the cationic amino group of long chain amine and the sulphonate group of CSB dye. UV-Vis absorption spectroscopic study indicates the formation of aggregates of CSB dye in the mixed (ODA-CSB) LB films.