Infrared absorption study of surface functional groups providing chemical modification of nanodiamonds by divalent copper ion complexes

Infrared (IR) absorption data evidence the presence of multiple carboxyl and anhydride groups together with hydroxyl and C(sp 3)–H groups in the dried copper-modified detonation nanodiamonds (DND). Insignificant differences in IR spectra of initially purified and copper-modified nanodiamonds indicat...

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Bibliographic Details
Published in:Diamond and related materials 2011-08, Vol.20 (8), p.1234-1238
Main Authors: Osipov, V.Yu, Aleksenskiy, A.E., Shames, A.I., Panich, A.M., Shestakov, M.S., Vul’, A.Ya
Format: Article
Language:English
Subjects:
Anhydrides
Carboxyl group
Chemical modification
Detonation
Functional groups
Infrared absorption
Infrared radiation
Metal cations
Nanocomposites
Nanodiamonds
Nanomaterials
Nanostructure
Surface chemistry
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Summary:Infrared (IR) absorption data evidence the presence of multiple carboxyl and anhydride groups together with hydroxyl and C(sp 3)–H groups in the dried copper-modified detonation nanodiamonds (DND). Insignificant differences in IR spectra of initially purified and copper-modified nanodiamonds indicate that in the ion exchange process Cu 2+ ions substitute protons just in a small fraction of the entire amount of carboxyl groups on the DND surface. Surface anhydride groups appear as the result of mutual conversion of the neighboring carboxyl groups into the anhydride ones. The observation of specific shape of IR absorption spectrum of DND is a good practical rule for primary selection of detonation nanodiamonds with oxygen-containing functional groups well suitable for targeted surface modification by double-charged metal ions. ► Nanodiamonds with functional groups well suitable for targeted surface modification. ► Targeted surface modification of nanodiamonds by double-charged metal ions. ► Percentage of surface groups that provide the effective trapping of copper ions. ► IR absorption spectra of that DND which can be chemically modified by copper ions.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2011.07.008