Porous Alkaline-Earth Doped Multiwall Carbon Nanotubes with Base Catalytic Properties

Barrios-Bermúdez, Niurka; Santos-Granados, J.; Casilda, Vanesa Calvino; Cerpa-Naranjo, Arisbel; Cervantes, María Luisa Rojas

doi:10.1007/s10562-019-02807-6

Cited by 3 publications

(2 citation statements)

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“…The best catalyst was CNT-But, which was the one showing the highest S BET and V pore values (Table 3). Considering that the catalyst with the greater amount of anchored amine was CNT-Et, it seems that for this reaction, not only the basicity of the nitrogen of the amine groups contributed to the activity, but also the textural properties of the samples, in agreement with other results reported for carbon nanotubes [30] and other materials [52,53] used as catalysts in Knoevenagel condensation.…”

Section: Catalytic Activitysupporting

confidence: 89%

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Amino-Functionalized Multiwall Carbon Nanotubes as Efficient Basic Catalysts for the Formation of γ-Lactams: Synthesis of N-1-Heptenyl-2-pyrrolidinone

2022

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In this work, we prepared a series of N-functionalized carbon nanotubes by means of a process of acylation-amidation of commercial multiwall carbon nanotubes that were previously pre-oxidized with nitric acid. Three different amines, butylamine, N,N-dimethyl ethylenediamine, and ethylenediamine, were used in the process. The characterization of samples by several techniques probed the incorporation of nitrogen atoms to the carbon nanotubes, especially in the case of ethylenediamine. The solids were tested as catalysts in the synthesis of N-1-heptenyl-2-pyrrolidinone, included in the group of a γ-lactams, compounds that show important biological properties. The most active catalyst was that prepared with butylamine, which exhibited the highest SBET and Vpore values and contained an amount of nitrogen that was intermediate between that of the other two catalysts. A yield of 60% to N-1-heptenyl-2-pyrrolidinone was achieved after 3 h at 120 °C under free-solvent conditions. This catalyst could be used in four consecutive cycles without significant activity loss.

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Section: Catalytic Activitysupporting

confidence: 89%

“…The point of zero charge (PZC) was measured following a similar procedure to that described in [29] with some modifications. For more details, see the complete description in [30].…”

Section: Characterization Of Samplesmentioning

confidence: 99%