Vesicular Nanostructure Formation by Self-Assembly of Anisotropic Penta-phenol-Substituted Fullerene in Water

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• 作者：Vaishakhi Mohanta ; Debayan Dey ; Suryanarayanarao Ramakumar ; Satish Patil
• 刊名：Langmuir
• 出版年：2015
• 出版时间：December 22, 2015
• 年：2015
• 卷：31
• 期：50
• 页码：13600-13608
• 全文大小：724K
• ISSN：1520-5827

文摘

A study on self-assembly of anisotropically substituted penta-aryl fullerenes in water has been reported. The penta-phenol-substituted amphiphilic fullerene derivative [C₆₀Ph₅(OH)₅] exhibited self-assembled vesicular nanostructures in water under the experimental conditions. The size of the vesicles was observed to depend upon the kinetics of self-assembly and could be varied from 鈭?00 to 鈭?0 nm. Our mechanistic study indicated that the self-assembly of C₆₀Ph₅(OH)₅ is driven by extensive intermolecular as well as water-mediated hydrogen bonding along with fullerene鈥揻ullerene hydrophobic interaction in water. The cumulative effect of these interactions is responsible for the stability of vesicular structures even on the removal of solvent. The substitution of phenol with anisole resulted in different packing and interaction of the fullerene derivative, as indicated in the molecular dynamics studies, thus resulting in different self-assembled nanostructures. The hollow vesicles were further encapsulated with a hydrophobic conjugated polymer and water-soluble dye as guest molecules. Such confinement of 蟺-conjugated polymers in fullerene has significance in bulk heterojunction devices for efficient exciton diffusion.