Issue 32, 2015

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

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

Supplementary files

Article information

Article type
Paper
Submitted
21 Apr 2015
Accepted
12 Jul 2015
First published
15 Jul 2015

Phys. Chem. Chem. Phys., 2015,17, 20822-20829

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

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements