Self‐Aggregation of a Naphthalene‐Monoimide Amphiphile and Its Charge‐Transfer‐Complex Driven Morphogenesis in Water. Issue 8 (4th July 2018)

• Record Type: Journal Article
• Authors: Ghosh, Subhajit; Pramanik, Bapan; Das, Debapratim
• Is Part Of: ChemNanoMat. Volume 4:Issue 8(2018)
• Page Start: 867
• Page End: 873
• Publication Date: 2018-07-04
• Subjects: amphiphiles -- charge transfer -- naphthalene-monoimide -- self-assembly -- vesicles; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.201800213
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: A detailed study on the self‐assembly of a naphthalene‐monoimide (NMI)‐containing amphiphile (A‐1 ) in aqueous medium is reported. The amphiphile forms micelles at a lower concentration and, with an increase in concentration, the micelles are transformed into vesicles. A detailed thermodynamic study reveals that the micelle‐to‐vesicle transformation is a spontaneous and entropy driven process. In the presence of an electron donor, 1, 5‐dihydroxynaphthalene (DHN), the vesicles further transformed into tape‐like aggregates. A‐1 and DHN form a 1 : 1 charge‐transfer complex as shown from the ITC and absorption spectroscopic data. The charge‐transfer complexation was also found to be a thermodynamically favorable process. The tapes obtained from the charge‐transfer complexes were found to be more conductive that of the vesicles. Various spectroscopic, microscopic, ITC, XRD, and other techniques were utilized to reveal the underlying self‐assembly mechanism. Abstract : CT induced morphogenesis : Micelle‐to‐vesicle formation by a naphthalene‐monoimide based anionic amphiphile in water is described. Charge‐transfer (CT) complexation with 1, 5‐dihydroxynaphthalene transformed the vesicle to long uniform tapes with high conductivity.