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
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.
|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
|Deposited On:||09 Sep 2009 06:16|
|Last Modified:||09 Sep 2009 06:16|
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