Binary Diamondoid Building Blocks for Molecular Gels
Abstract
Adamantane is a type of diamondoid molecules that has a cage or globular shape with a diameter of 6.34 ± 0.04 Å.8 Anisotropic interactions between these truly nanoscopic particles can be induced through the derivatization of the diamondoid cage. Here we explore the gelation of paired systems of adamantane where attractions are introduced through van der Waals forces and hydrogen bonding. Gels are produced through the mixing of 1-adamantanecarboxylic acid (A1C) and 1-adamantylamine (A1N). Upon mixing dimethyl sulfoxide solutions of these molecules at vanishing concentrations, these diamondoid molecules rapidly precipitate. A space-filling gel of the resulting aggregates is observed at approximately 3% by weight. These resulting gels have elastic moduli of 102–104 Pa in the 3–7 wt % concentration range. At a 1:1 mol ratio of 1-adamantanecarboxylic acid (A1C) and 1-adamantylamine (A1N), the gel’s elastic modulus and yield stress increase as volume fractions Φx and Φy with x ≈ 4.2 and y ≈ 3.5. Here, the dependencies of moduli and yield stress on the volume fraction display characteristics of colloidal gels. Transmission electron microscope (TEM) images indicate that the gels are formed from a network of interwoven and branched fibers which are composed of ~30 nm crystallites that have undergonemore »
- Authors:
-
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Publication Date:
- Research Org.:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1875080
- Grant/Contract Number:
- FG02-07ER46471; FG02-07ER46453
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Langmuir
- Additional Journal Information:
- Journal Volume: 30; Journal Issue: 25; Journal ID: ISSN 0743-7463
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Crystal structure; Crystals; Fibers; Molecules; Stress
Citation Formats
Zhang, Mengwen, and Zukoski, Charles F. Binary Diamondoid Building Blocks for Molecular Gels. United States: N. p., 2014.
Web. doi:10.1021/la4034244.
Zhang, Mengwen, & Zukoski, Charles F. Binary Diamondoid Building Blocks for Molecular Gels. United States. https://doi.org/10.1021/la4034244
Zhang, Mengwen, and Zukoski, Charles F. Thu .
"Binary Diamondoid Building Blocks for Molecular Gels". United States. https://doi.org/10.1021/la4034244. https://www.osti.gov/servlets/purl/1875080.
@article{osti_1875080,
title = {Binary Diamondoid Building Blocks for Molecular Gels},
author = {Zhang, Mengwen and Zukoski, Charles F.},
abstractNote = {Adamantane is a type of diamondoid molecules that has a cage or globular shape with a diameter of 6.34 ± 0.04 Å.8 Anisotropic interactions between these truly nanoscopic particles can be induced through the derivatization of the diamondoid cage. Here we explore the gelation of paired systems of adamantane where attractions are introduced through van der Waals forces and hydrogen bonding. Gels are produced through the mixing of 1-adamantanecarboxylic acid (A1C) and 1-adamantylamine (A1N). Upon mixing dimethyl sulfoxide solutions of these molecules at vanishing concentrations, these diamondoid molecules rapidly precipitate. A space-filling gel of the resulting aggregates is observed at approximately 3% by weight. These resulting gels have elastic moduli of 102–104 Pa in the 3–7 wt % concentration range. At a 1:1 mol ratio of 1-adamantanecarboxylic acid (A1C) and 1-adamantylamine (A1N), the gel’s elastic modulus and yield stress increase as volume fractions Φx and Φy with x ≈ 4.2 and y ≈ 3.5. Here, the dependencies of moduli and yield stress on the volume fraction display characteristics of colloidal gels. Transmission electron microscope (TEM) images indicate that the gels are formed from a network of interwoven and branched fibers which are composed of ~30 nm crystallites that have undergone oriented aggregation to form fibers.},
doi = {10.1021/la4034244},
journal = {Langmuir},
number = 25,
volume = 30,
place = {United States},
year = {Thu Jun 05 00:00:00 EDT 2014},
month = {Thu Jun 05 00:00:00 EDT 2014}
}
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