title: Self-assembly of fullerene-based janus particles in solution: effects of molecular architecture and solvent.
abstract: Two molecular Janus particles based on amphiphilic [60]fullerene (C60 ) derivatives were designed and synthesized by using the regioselective Bingel-Hirsh reaction and the click reaction. These particles contain carboxylic acid functional groups, a hydrophilic fullerene (AC60 ), and a hydrophobic C60 in different ratios and have distinct molecular architectures: 1:1 (AC60 -C60 ) and 1:2 (AC60 -2C60 ). These molecular Janus particles can self-assemble in solution to form aggregates with various types of micellar morphology. Whereas vesicular morphology was observed for both AC60 -C60 and AC60 -2C60 in tetrahydrofuran, in a mixture of N,N-dimethylformamide (DMF)/water, spherical micelles and cylindrical micelles were observed for AC60 -C60 and AC60 -2C60 , respectively. A mechanism of formation was tentatively proposed based on the effects of molecular architecture and solvent polarity on self-assembly.
authors.affiliation: Department of Polymer Science, College of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave. Akron, Ohio, 44325-3909 (USA), Fax: (+1) 330-972-8626.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Lin
authors.forename: Pengtao
authors.initials: P
authors.lastname: Lu
authors.forename: Chih-Hao
authors.initials: CH
authors.lastname: Hsu
authors.forename: Kan
authors.initials: K
authors.lastname: Yue
authors.forename: Xue-Hui
authors.initials: XH
authors.lastname: Dong
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.forename: Kai
authors.initials: K
authors.lastname: Guo
authors.forename: Chrys
authors.initials: C
authors.lastname: Wesdemiotis
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Zhang
authors.forename: Xinfei
authors.initials: X
authors.lastname: Yu
authors.forename: Stephen Z D
authors.initials: SZ
authors.lastname: Cheng
keywords: Janus particles; fullerenes; micelles; self-assembly; vesicles