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Aggregation of a C-60-didodecyloxybenzene dyad: Structure, dynamics, and mechanism of vesicle growth

Gayathri, S. Shankara and Patnaik, Archita (2007) Aggregation of a C-60-didodecyloxybenzene dyad: Structure, dynamics, and mechanism of vesicle growth. LANGMUIR , 23 (9). pp. 4800-4808. ISSN 0743-7463

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Official URL: http://pubs.acs.org/doi/abs/10.1021/la0626961

Abstract

The mechanism of formation and the stability of spontaneously formed vesicles upon self-assembly of a partially ground-state charge-separated, nonpolar-polar-nonpolar fullerene(C-60)-didodecyloxybenzene (DDB) dyad in binary solvent mixtures requiring a critical dielectric constant of similar to 30 are reported. Molecular interactions giving rise to defined vesicles with in-plane bilayer packing are detailed from the predominant van der Waals and electrostatic interactions existing on the dyad's framework. The vesicles are formed with a large bending rigidity of 18k(B)T, which on further extraction into a polar water medium resulted in uniform spheres that corroborated well with the theoretical predictions. Furthermore, the water-extracted spherical dyad aggregates at an increased dyad concentration, leading to the formation of giant micrometer-sized fractals following diffusion-limited cluster aggregation. These dyad aggregates act as efficient quenchers of fluorescent dyes with a quenching rate of 4.6 x 10(13) M-1 s(-1).

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7111
Deposited By:JNCASR
Deposited On:09 Sep 2009 06:16
Last Modified:09 Sep 2009 06:16

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