Nano Archive

Structure and dynamics in solvent-polarity-induced aggregates from a C-60 fullerene-based dyad

Gayathri , S. S. and Agarwal , A. K. and Suresh , K. A. and Patnaik , A. (2005) Structure and dynamics in solvent-polarity-induced aggregates from a C-60 fullerene-based dyad. Langmuir, 21 (26). pp. 12139-12145. ISSN 0743-7463

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Official URL: http://pubs.acs.org/doi/abs/10.1021/la052313j

Abstract

A novel methanofullerene dyad based on a hydrophobic (acceptor C-60 moiety)-hydrophilic (bridge with benzene and ester functionalities)-hydrophobic (donor didodecyloxybenzene) network is designed and synthesized. Electronic absorption spectral features revealed the molecule to exhibit a strong tendency to self-aggregate in binary solvent mixtures at room temperature, where the dielectric constant exceeds a critical value, similar to 30. The dynamic structure factors of these spherical aggregates revealed stretched exponential decay with sizes varying between 110 and 250 nm with an increasing concentration, estimated from the dynamic light scattering experiments. However, a loss of shape selectivity of these aggregates was noted at lower water volume fractions in the binary solvent mixtures. The water-extracted spherical clusters were identified to be fractals with a dimension of 1.85, leading to diffusion-limited cluster aggregation as the mechanistic route for clusterization.

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:7115
Deposited By:JNCASR
Deposited On:09 Sep 2009 06:16
Last Modified:09 Sep 2009 06:16

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