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master thesis-TONG ZHANG ohio 412.pdf (1.7 MB)

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The solution behavior and self-assembly of uranyl peroxide nanocages

Zhang, Tong
http://rave.ohiolink.edu/etdc/view?acc_num=akron1492040385937379

Abstract Details

2017, Master of Science, University of Akron, Polymer Science.
Macroions such as polyoxometalates (POMs) possess unique solution behavior that are different from simple ions. Through adjusting the effective surface charge density, these macroions can self-assemble into hollow spherical structure with counterion-mediated structure as the major driving force.1 Over the past decade, there has been a great process in synthesizing novel uranyl POMs, which helps to better conduct the advanced nuclear fuel energy and the safe storage of radioactive fuel waste.2 Besides, the extensive study on the solution behavior and applications of these uranyl clusters still has promising future to be uncovered. In this work, Li48+mK12(OH)m[UO2(O2)(OH)]60 (H2O)n (m˜20 and n˜310) (U60), which has 60 uranyl peroxide hydroxide polyhedra arranged in an anionic fullerene-topology cage3, was chosen as the model to investigate the solution properties of uranyl-based POMs. Cationic surfactants with different alkyl chain lengths (cetyl-trimethylammonium bromide (CTAB), dodecyl-trimethylammonium bromide (DTAB) and octyl-trimethyl-ammonium bromide (OTAB)) were applied to U60 dilute aqueous solution to explore the solution behavior and self-assembly of surfactant/U60 at different temperatures. It is discovered that upon addition of cationic surfactants, the non-covalently linked U60-surfactant hybrids can initially self-assemble into hollow vesicular structures. And then these vesicles tend to further aggregate. During the self-assembly process, hydrophobic interaction was believed to be the main driving force for the vesicle formation. In addition, the competition between high affinity of Rb+ with U60 and the entering ability of K+ during the self-assembly process was studied and discussed later. Laser light scattering (LLS) and isothermal titration calorimetry (ITC) studies were used to investigate the interaction of different surfactants with U60. Transmission electron spectroscopy (TEM) helps to confirm the morphology of the assemblies.
Tianbo Liu (Advisor)
Toshikazu Miyoshi (Committee Member)
50 p.
Physical Chemistry; Polymer Chemistry
macroions; self-assembly; polyoxometalates; uranyl peroxide

Recommended Citations

Citations

  • Zhang, T. (2017). The solution behavior and self-assembly of uranyl peroxide nanocages [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1492040385937379

    APA Style (7th edition)

  • Zhang, Tong. The solution behavior and self-assembly of uranyl peroxide nanocages. 2017. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1492040385937379.

    MLA Style (8th edition)

  • Zhang, Tong. "The solution behavior and self-assembly of uranyl peroxide nanocages." Master's thesis, University of Akron, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1492040385937379

    Chicago Manual of Style (17th edition)

akron1492040385937379
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© 2017, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.