Aluminum Solvate Complexes Forming in Acidic Methanol-Acetone Mixtures Studied by 27Al NMR Spectroscopy

Samadi‐Maybodi, Abdolraouf; Pourali, S. Masoomeh; Tafazzoli, Mohsen

doi:10.1007/s10953-008-9364-1

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…In the new method, where Kaol-DMSO reacted with the AlCl 3 /MeOH solution, the interlayer grafting of MeOH could be finished within 30 min. The dissolution of AlCl 3 in MeOH was very drastic due to Reaction normalA normall normalC normall 3 + 6 normalC normalH 3 normalO normalH → normalA normall ( C H 3 O H ) 6 normalC normall 3 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The polarity of Al(CH 3 OH) 6 Cl 3 is much higher than that of MeOH. 45 Therefore, Al(CH 3 OH) 6 Cl 3 could pass through the EDL and enter the interlayer space of Kaol. Then, Reaction 3 could take place in the Kaol interlayer.…”

Section: Alclmentioning

confidence: 99%

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Role of Impurities in Kaolinite Intercalation and Subsequent Formation of Nanoscrolls

et al. 2023

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Kaolinite (Kaol)−methanol (MeOH) compounds (Kaol-Me) are widely used as the starting materials for further intercalation. The conventional approach to prepare Kaol-Me compounds is to wash dimethyl sulfoxide (DMSO)-intercalated Kaol (Kaol-DMSO) for 16 days, and MeOH must be refreshed every day. Herein, we report a new and much more efficient method to prepare Kaol-Me from Kaol-DMSO by the promotion of AlCl 3 under mild conditions, and the corresponding mechanism is investigated. The X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and X-ray fluorescence characterization results reveal that the electric double layer resulting from the impurities absorbed on the kaolinite surface prevents weakly polar molecules from entering the kaolinite interlayers, which is probably the key reason that MeOH must be refreshed daily in the preparation of Kaol-Me compounds. After being treated with HCl to remove the impurities, Kaol-Me-HCl was successfully intercalated by cetyltrimethyl ammonium bromide and subsequently predominantly curled into nanoscrolls.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Role of Impurities in Kaolinite Intercalation and Subsequent Formation of Nanoscrolls

et al. 2023

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“…27 Al NMR has been employed extensively in the investigation of aluminum complexes in nonaqueous and aqueous solution [3,5,6,[9][10][11][12]. Although the 27 Al nucleus is quadrupolar (spin = 5/2), the combination of high natural abundance (100 %) and sensitivity (0.2 relative to protons) allows observation of reasonably symmetric complexes in very low concentration [10].…”

Section: Introductionmentioning

confidence: 99%

27Al and 31P NMR Investigations of Soluble Aluminophosphate Species in Alcohol–Water Mixtures

2012

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In this work, phosphorus-31 and aluminum-27 nuclear magnetic resonance techniques were used to characterize the distribution of soluble aluminophosphate species in methanol + water and ethanol + water mixtures. The assignment of the peaks to aluminate species was attempted, clarifying earlier work and producing information on the different aluminophosphate complexes. Nine peaks were observed at −0.41, −6.4, −7.5, −7.9, −13.1, −13.9, −16.6, −18.1 and −20.6 ppm. Four new peaks appeared in the 31 P NMR spectra of the alcoholic aluminophosphate solutions and their intensities changed with changes of the alcohol:water volume ratio. These new peaks were observed in the presence of methanol or ethanol but not in aqueous solutions.

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Sulfuric acid improves the reactivity of zeolites via dealumination

Chen

Srubar

2020

Construction and Building Materials

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Aluminum Solvate Complexes Forming in Acidic Methanol-Acetone Mixtures Studied by 27Al NMR Spectroscopy

Cited by 5 publications

References 17 publications

Role of Impurities in Kaolinite Intercalation and Subsequent Formation of Nanoscrolls

Role of Impurities in Kaolinite Intercalation and Subsequent Formation of Nanoscrolls

27Al and 31P NMR Investigations of Soluble Aluminophosphate Species in Alcohol–Water Mixtures

Sulfuric acid improves the reactivity of zeolites via dealumination

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