Chemically stable multilayered covalent organic nanosheets from covalent organic frameworks via mechanical delamination

Chandra S, Kandambeth S, Biswal BP, Lukose B, Kunjir SM, Chaudhary M, Babarao R, Heine T, Banerjee R (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Journal of the American Chemical Society American Chemical Society

Book Volume: 135

Pages Range: 17853-17861

Journal Issue: 47

DOI: 10.1021/ja408121p

Abstract

A series of five thermally and chemically stable functionalized covalent organic frameworks (COFs), namely, TpPa-NO2, TpPa-F4, TpBD-(NO2)2, TpBD-Me2, and TpBD-(OMe) 2 were synthesized by employing the solvothermal aldehyde-amine Schiff base condensation reaction. In order to complete the series, previously reported TpPa-1, TpPa-2, and TpBD have also been synthesized, and altogether, eight COFs were fully characterized through powder X-ray diffraction (PXRD), Fourier transform IR (FT-IR) spectroscopy, 13C solid-state NMR spectroscopy, and thermogravimetric analysis. These COFs are crystalline, permanently porous, and stable in boiling water, acid (9 N HCl), and base (3 N NaOH). The synthesized COFs (all eight) were successfully delaminated using a simple, safe, and environmentally friendly mechanical grinding route to transform into covalent organic nanosheets (CONs) and were well characterized via transmission electron microscopy and atomic force microscopy. Further PXRD and FT-IR analyses confirm that these CONs retain their structural integrity throughout the delamination process and also remain stable in aqueous, acidic, and basic media like the parent COFs. These exfoliated CONs have graphene-like layered morphology (delaminated layers), unlike the COFs from which they were synthesized. © 2013 American Chemical Society.

Involved external institutions

Council for Scientific and Industrial Research (CSIR) IN India (IN) Jacobs University Bremen gGmbH DE Germany (DE) Commonwealth Scientific and Industrial Research Organisation (CSIRO) AU Australia (AU)

How to cite

APA:

Chandra, S., Kandambeth, S., Biswal, B.P., Lukose, B., Kunjir, S.M., Chaudhary, M.,... Banerjee, R. (2013). Chemically stable multilayered covalent organic nanosheets from covalent organic frameworks via mechanical delamination. Journal of the American Chemical Society, 135(47), 17853-17861. https://doi.org/10.1021/ja408121p

MLA:

Chandra, Suman, et al. "Chemically stable multilayered covalent organic nanosheets from covalent organic frameworks via mechanical delamination." Journal of the American Chemical Society 135.47 (2013): 17853-17861.

BibTeX: Download