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- W2080225890 startingPage "101914" @default.
- W2080225890 abstract "One of the benefits of supramolecular assemblies that form at dynamic interfaces is the opportunity to develop condensed phase systems that respond to environmental stimuli. A prerequisite of this responsive behavior is that the supramolecular system be designed to sit very near the stability of two or more crystal structures. We have created such a bi-phasic system with aryl-triazole oligomers by investigating how phase morphology is controlled by the interplay between interactions that involve the oligomer’s dipolar cores (Δμ = 3.5 debye), van der Waals contacts of their pendant alkyl chains (C4–C18), and close-contact hydrogen bonding. Scanning tunneling microscopy experiments conducted at the solution-graphite interface allow sub-molecular resolution of the ordered monolayers to unambiguously determine the packing and structure of two principle phases, α and β. The system is balanced very near the edge of phase stability, evidenced by co-existent phases present over short time frames and by the changes in preference between the two 2D supramolecular assemblies that occur with small modifications to the molecular structure. We demonstrate that the bi-phasic behavior can be understood as a balance between electrostatic interactions and van der Waals contacts, two variables within a larger parameter space, allowing synthetic design to move this solution-surface system across the stability boundary of different condensed-phase structures. These findings are a foundation for the development of environmentally responsive 2D supramolecular arrays." @default.
- W2080225890 created "2016-06-24" @default.
- W2080225890 creator A5008334206 @default.
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- W2080225890 creator A5072699347 @default.
- W2080225890 date "2015-03-14" @default.
- W2080225890 modified "2023-10-16" @default.
- W2080225890 title "Living on the edge: Tuning supramolecular interactions to design two-dimensional organic crystals near the boundary of two stable structural phases" @default.
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- W2080225890 doi "https://doi.org/10.1063/1.4906895" @default.
- W2080225890 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4327918" @default.
- W2080225890 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25770503" @default.
- W2080225890 hasPublicationYear "2015" @default.
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