Manipulation of Self-Assembled Nanostructure Dimensions in Molecular   Janus Particles

doi:10.1021/acsnano.6b01336

CORC > 北京大学 > 化学与分子工程学院

	Manipulation of Self-Assembled Nanostructure Dimensions in Molecular Janus Particles
	Liu, Hao ; Luo, Jiancheng ; Shan, Wenpeng ; Guo, Dong ; Wang, Jing ; Hsu, Chih-Hao ; Huang, Mingjun ; Zhang, Wei ; Lotz, Bernard ; Zhang, Wen-Bin ; Liu, Tianbo ; Yue, Kan ; Cheng, Stephen Z. D.
刊名	ACS Nano
	2016
关键词	Janus particles self-assembly nanobelts nanosheets polyoxometalates GIANT MOLECULES SUPRAMOLECULAR CHEMISTRY SHAPE AMPHIPHILES NANOPARTICLES DAWSON POLYOXOTUNGSTATES KEGGIN DESIGN FUNCTIONALIZATION SURFACTANTS
DOI	10.1021/acsnano.6b01336
英文摘要	The ability to manipulate self-assembly of molecular building blocks is the key to achieving precise "bottom-up" fabrications of desired nanostructures. Herein, we report a rational design, facile synthesis, and self assembly of a series of molecular Janus particles (MJPs) constructed by chemically linking alpha-Keggin-type polyoxometalate (POM) nanoclusters with functionalized polyhedral oligomeric silsesquioxane (POSS) cages. Diverse nanostructures were obtained by tuning secondary interactions among the building blocks and solvents via three factors: solvent polarity, surface functionality of POSS derivatives, and molecular topology. Self-assembled morphologies of KPOM-BPOSS (B denotes isobutyl groups) were found dependent on solvent polarity. In acetonitrile/water mixtures with a high dielectric constant, colloidal nanoparticles with nanophase-separated internal lamellar structures quickly formed, which gradually turned into one-dimensional nanobelt crystals upon aging, while stacked crystalline lamellae were dominantly observed in less polar methanol/chloroform solutions. When the crystallizable BPOSS was replaced with noncrystallizable cyclohexyl-functionalized CPOSS, the resulting KPOM-CPOSS also formed colloidal spheres; however, it failed to further evolve into crystalline nanobelt structures. In less polar solvents, KPOM-CPOSS crystallized into isolated two-dimensional nanosheets, which were composed of two inner crystalline layers of Keggin POM covered by two monolayers of amorphous CPOSS. In contrast, self-assembly of KPOM-2BPOSS was dominated by crystallization of the BPOSS cages, which was hardly sensitive to solvent polarity. The BPOSS cages formed the crystalline inner bilayer, sandwiched by two outer layers of Keggin POM clusters. These results illustrate a rational strategy to purposely fabricate self-assembled nanostructures with diverse dimensionality from MJPs with controlled molecular composition and topology.; National Science Foundation [DMR-1408872]; SCI(E); EI; PubMed; ARTICLE; tliu@uakron.edu; ky13@zips.uakron.edu; scheng@uakron.edu; 7; 6585-6596; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/492008]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Liu, Hao,Luo, Jiancheng,Shan, Wenpeng,et al. Manipulation of Self-Assembled Nanostructure Dimensions in Molecular Janus Particles[J]. ACS Nano,2016.
APA	Liu, Hao.,Luo, Jiancheng.,Shan, Wenpeng.,Guo, Dong.,Wang, Jing.,...&Cheng, Stephen Z. D..(2016).Manipulation of Self-Assembled Nanostructure Dimensions in Molecular Janus Particles.ACS Nano.
MLA	Liu, Hao,et al."Manipulation of Self-Assembled Nanostructure Dimensions in Molecular Janus Particles".ACS Nano (2016).