N-Doped porous carbon nanotubes: synthesis and application in catalysis

Abstract

Uniform N-doped carbon nanotubes were obtained for the first time via a morphology-preserving thermal transformation of organic polymer nanotubes without any additional templates. These carbon nanotubes acted as a superior metal-free carbon catalyst for C-H arylation of benzene, reductive hydrogen atom transfer and oxidation reactions.

Selective Aerobic Oxidation of Lactate to Pyruvate Catalyzed by Vanadium‐Nitrogen‐Doped Carbon Nanosheets

“…For V‐NCNs‐600, the peak intensity ratio of I D / I G was determined to be 0.81 suggesting a graphitic structure, in agreement with the XRD results (Figure S3) . By comparison, the I D / I G was remarkably increased to 0.95, 0.95 and 0.97 for V‐NCNs‐700, V‐NCN‐800 and V‐NCNs‐900, respectively, indicating an increase in the defect and disorder degree with pyrolysis temperature . Finally, we examined the bulk structure using powder X‐ray diffraction (PXRD, Figure S3).…”

Synthesis of a molecularly defined single-active site heterogeneous catalyst for selective oxidation of N-heterocycles

“…Carbon catalysts have been widely applied in the selective oxidation of alkanes 9 – 13 , alcohols 14 – 18 , amines 19 – 22 , thiols and sulfides 5 , 23 , the nucleophilic addition of alcohol to an epoxide 24 , aldehyde acetalization or esterification 24 , 25 , Michael addition reactions 26 , 27 , F-C addition of indoles to α,β-unsaturated ketones 28 and the synthesis of dipyrromethane 29 , the catalytic reduction of olefin 30 , 31 and nitrobenzene 32 , C-heteroatom coupling reactions 7 , 33 , 34 and heterocycles dehydrogenative aromatization 35 – 37 , etc.…”

Small organic molecules with tailored structures: initiators in the transition-metal-free C–H arylation of unactivated arenes

“…In an initial set of experiments, 14 selected small organic molecules with nitrogen or oxygen atoms in their structures were tested for the coupling of benzene and iodobenzene according to previous studies and our previous work in this area (as shown in Table 1). 31,[44][45][46][47][48][49] All the tested molecules showed catalytic ability for the conversion except (CH 3 ) 3 OH, which creates extremely large steric hindrance (Table 1, entry 11). Aliphatic diamines exhibited considerable yields, especially aer mono-methylation (Table 1, entries 1-3, 65-71%).…”