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Issue 32, 2015
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Molecular pillar supported graphene oxide framework: conformational heterogeneity and tunable d-spacing

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Abstract

n-Alkylamines were grafted on the basal plane oxygen functionalities of graphene oxide (GO), yielding molecular pillar supported graphene oxide frameworks (GOFs) with tunable interlayer spacing. A major fraction of n-alkylamines was found to covalently interact with the basal plane epoxy groups via nucleophilic substitution reactions. The d-spacing in GOFs could be tailored between 10.5 and 28.9 Å by varying the chain length of the n-alkylamines. 13C SSNMR explicitly showed the coexistence of both trans and gauche conformation modes. The relative populations of these modes control the conformational heterogeneity and orientation of n-alkylamines in the GOFs. A plausible bilayer structural model of the GOFs was demonstrated. The terminal methyl and methylene units of the n-alkylamines grafted on the GO basal plane were interdigitated with the counter layer and afforded a double-layer structure of alkyl chain supported GOFs.

Graphical abstract: Molecular pillar supported graphene oxide framework: conformational heterogeneity and tunable d-spacing

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Supplementary files

Article information


Submitted
21 Apr 2015
Accepted
12 Jul 2015
First published
15 Jul 2015

Phys. Chem. Chem. Phys., 2015,17, 20822-20829
Article type
Paper

Molecular pillar supported graphene oxide framework: conformational heterogeneity and tunable d-spacing

H. P. Mungse, R. Singh, H. Sugimura, N. Kumar and O. P. Khatri, Phys. Chem. Chem. Phys., 2015, 17, 20822
DOI: 10.1039/C5CP02313K

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