Transition Kinetics of Self-Assembled Supramolecular Dodecagonal Quasicrystal and Frank–Kasper σ Phases in AB n Dendron-Like Giant Molecules
- Univ. of Akron, OH (United States)
- Donghua Univ., Shanghai (China)
- Sichuan Univ., Chengdu (China)
- South China Univ. of Technology (SCUT), Guangzhou (China)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Northern Illinois Univ., DeKalb, IL (United States)
- Univ. of Akron, OH (United States); South China Univ. of Technology (SCUT), Guangzhou (China)
A series of noncrystalline ABn dendron-like giant molecules DPOSS–MPOSSn (n = 2–6, DPOSS: hydrophilic polyhedral oligomeric silsesquioxane (POSS) cage; MPOSS: hydrophobic POSS cage) were synthesized. These samples present a thermodynamically stable phase formation sequence from the hexagonal cylinder phase (plane group of P6mm), to the Frank–Kasper (F–K) A15 phase (space group of Pm$$\overline{3n}$$), and further to the F–K σ phase (space group of P42/mnm), with increasing the number of MPOSS in a single molecule (n, from 2 to 6). Moreover, for DPOSS–MPOSS5 and DPOSS–MPOSS6, an intriguing dodecagonal quasicrystal (DQC) structure has been identified and revealed as a kinetic favorable metastable phase at lower temperatures, while the thermodynamically stable phase is the σ phase. The detailed investigation of the transition kinetics between the DQC and σ phase in these samples makes it possible to identify how the self-assembly directs the phase transition in terms of molecular and supramolecular aspects.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-06CH11357; DMR-1408872; 2016ZT06C322
- OSTI ID:
- 1595953
- Journal Information:
- ACS Macro Letters, Vol. 8, Issue 7; ISSN 2161-1653
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Controlling the Periodically Ordered Nanostructures in Ceramics: A Macromolecule‐Guided Strategy
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journal | November 2019 |
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