Solvent-free one-step covalent functionalization of graphene oxide and nanodiamond with amines

Alzate-Carvajal, Natalia; Basiuk, Elena V.; Meza-Laguna, Víctor; Puente-Lee, Iván; Farı́as, M.H.; Bogdanchikova, Nina; Basiuk, Vladimir A.

doi:10.1039/c6ra22658b

Cited by 39 publications

(12 citation statements)

References 46 publications

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“…The binding energy difference between NH 2 and NH 3þ (1.6 eV) is in agreement with previous studies [43,44]. The same binding energy has been reported for NH 2 in the case of Pd and Ag substrates: CH 3 NH 2 /Pd [39], CH 3 CH 2 NH 2 /Ag [40], [41] and ODA on graphene oxide substrate [42]. The C 1s spectrum displayed three peaks: the first one at 285 eV can be ascribed to the aliphatic CeC bond of the ODA molecule [42].…”

Section: Xps Analysissupporting

confidence: 91%

“…The same binding energy has been reported for NH 2 in the case of Pd and Ag substrates: CH 3 NH 2 /Pd [39], CH 3 CH 2 NH 2 /Ag [40], [41] and ODA on graphene oxide substrate [42]. The C 1s spectrum displayed three peaks: the first one at 285 eV can be ascribed to the aliphatic CeC bond of the ODA molecule [42]. The second one at 286.1 eV is attributed to CeO and CeN bonds.…”

Section: Xps Analysissupporting

confidence: 72%

“…The second one at 286.1 eV is attributed to CeO and CeN bonds. The third, small peak at 288.3 eV is characteristic of CeN bonds in amides or O]CeO bonds [42] which would be due to surface pollution. For the Fe 2p spectrum, a first peak appears at 706.3 eV due to metallic iron and a second peak, beyond 710 eV, relates to iron oxides [45].…”

Section: Xps Analysismentioning

confidence: 99%

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Impedance analysis of film-forming amines for the corrosion protection of a carbon steel

Baux

Caussé

Esvan

et al. 2018

Electrochimica Acta

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Octadecylamine (ODA) is a well-known organic inhibitor for the corrosion protection of carbon steels. In the present study, electrochemical impedance data analysis was performed to extract physical parameters of the ODA thin film that formed on a P275 carbon steel surface. First, surface observations and contact angle measurements showed the steel surface modification after the ODA treatment linked to the adsorption of an organic hydrophobic thin film. X-ray photoelectron spectroscopy confirmed the presence of a very thin organic layer and revealed the presence of iron oxide/hydroxide underlying the ODA film. The impedance data analysis with a power-law distribution of resistivity in the organic film allowed the permittivity and thickness to be extracted. Finally, from the impedance results with and without ODA, the instantaneous corrosion inhibition efficiency was determined.

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Section: Xps Analysissupporting

confidence: 91%

Section: Xps Analysissupporting

confidence: 72%

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Impedance analysis of film-forming amines for the corrosion protection of a carbon steel

Baux

Caussé

Esvan

et al. 2018

Electrochimica Acta

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“…This counts as C-N bonding, which superimposes on the *C-O-C* from the shellac, and it appears on the film surface upon the interaction with the pepsin. Looking into the N 1s high-resolution spectra, presented in the inset of Figure 7, one can see that the main nitrogen-related bonds are those related to the amide formation, peaked at 400.0 eV, as well as those associated with the protonated nitrogen obtained upon interaction with COOH functionalities [36]. The results are consistent with the increase of nitrogen atomic concentration with the time of immersion in SGF.…”

Section: Acidic Solution Resistance On Samples Prepared By Maple Deposupporting

confidence: 73%

Shellac Thin Films Obtained by Matrix-Assisted Pulsed Laser Evaporation (MAPLE)

et al. 2018

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We report on the fabrication of shellac thin films on silicon substrates by matrix-assisted pulsed laser evaporation (MAPLE) using methanol as matrix. Very adherent, dense, and smooth films were obtained by MAPLE with optimized deposition parameters, such as laser wavelength and laser fluence. Films with a root mean square (RMS) roughness of 11 nm measured on 40 × 40 µm 2 were obtained for a 2000-nm-thick shellac film deposited with 0.6 J/cm 2 fluence at a laser wavelength of 266 nm. The MAPLE films were tested in simulated gastric fluid in order to assess their capabilities as an enteric coating. The chemical, morphological, and optical properties of shellac samples were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Author Contributions: Investigation, S.B.; Formal Analysis, A.B. and V.M.; Conceptualization, A.M.; Supervision, B.M.; Writing-Review & Editing, A.M., B.M., S.B., A.B. and V.M. Conflicts of Interest:The authors declare no conflict of interest. Author Contributions: Investigation, S.B.; Formal Analysis, A.B. and V.M.; Conceptualization, A.M.; Supervision, B.M.; Writing-Review & Editing, A.M., B.M., S.B., A.B. and V.M.

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“…ND has rather complex structure including a diamond core composed of sp 3 -hybridized carbon atoms, a fullerene-like shell of sp 2 -hybridized C atoms, and nally an outer surface in which carbon atoms form a variety of oxygenated functional groups. Like in the case of GO, carboxylic functionalities are found among the most abundant groups identied on ND surface, and therefore, it is not surprising that the functionalization of ND [34][35][36][37][38][39][40] is based on essentially the same chemical strategies and protocols as those employed for GO.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide and nanodiamond: same carboxylic groups, different complexation properties

2017

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DFT calculations (PBE functional with the empirical correction by Grimme) were employed to explain why our attempts to coordinatively functionalize nanodiamond (ND) with tetraazamacrocyclic cations [Ni(cyclam)] 2+ and [Ni(tet b)] 2+ , and to generate paramagnetic hybrid materials in this way, failed, contrary to the successful functionalization of graphene oxide (GO) reported previously (Appl. Surf. Sci., 2016, 371, 16-27). The explanation offered is based on the comparison of binding energies for low-spin (singlet) and high-spin (triplet) complexes of model carboxylate ions GO À and ND À with the two tetraazamacrocycles. The formation energies were interpreted in terms of DDE 3À1 values, which characterize the difference in stability for the triplet and singlet complexes (negative values mean that triplet state is more stable, and positive, that singlet state is more stable). While the results obtained do not rule out completely the possibility of forming high-spin [Ni(cyclam)] 2+ carboxylate derivatives on ND, in the case of [Ni(tet b)] 2+ comparison of the DDE 3À1 values explicitly demonstrated that the formation of high-spin complex is highly unfavorable with ND À contrary to GO À model: DDE 3À1 values obtained are 13.22 and À4.64 kcal mol À1 , respectively. For comparison, similar data are presented for a series of simpler carboxylates. In addition to binding energies and DDE 3À1 values, for all the systems studied we analyzed Ni-O distances, spin density plots and HOMOÀLUMO parameters.

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Solvent-free one-step covalent functionalization of graphene oxide and nanodiamond with amines

Abstract: Solvent-free covalent functionalization of graphene oxide and nanodiamond with amines was performed in one step at 150–180 °C.

Cited by 39 publications

References 46 publications

Impedance analysis of film-forming amines for the corrosion protection of a carbon steel

Impedance analysis of film-forming amines for the corrosion protection of a carbon steel

Shellac Thin Films Obtained by Matrix-Assisted Pulsed Laser Evaporation (MAPLE)

Graphene oxide and nanodiamond: same carboxylic groups, different complexation properties

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