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Title: Transition Kinetics of Self-Assembled Supramolecular Dodecagonal Quasicrystal and Frank–Kasper σ Phases in AB n Dendron-Like Giant Molecules

Journal Article · · ACS Macro Letters
 [1]; ORCiD logo [2];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [3];  [4];  [5]; ORCiD logo [6]
  1. Univ. of Akron, OH (United States)
  2. Donghua Univ., Shanghai (China)
  3. Sichuan Univ., Chengdu (China)
  4. South China Univ. of Technology (SCUT), Guangzhou (China)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Northern Illinois Univ., DeKalb, IL (United States)
  6. 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 Lab. (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
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Figures / Tables (5)