The Crystal Structures of [Al2(OH)2(H2O)8](SO4)2.2H2O and [Al2(OH)2(H2O)8](SeO4)2.2H2O.

Johansson, Georg; Dorm, Ebba; Seleborg, Madeleine; Motzfeldt, K.; Theander, Olof; Flood, H.

doi:10.3891/acta.chem.scand.16-0403

Cited by 128 publications

(22 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, a peak at m / z 295 may be due to [Al 4 O 5 Cl(H 2 O) 4 ] + or [Al 4 O 4 (OH) 2 Cl(H 2 O) 3 ] + . It has been reported that many hydrolyzed aluminum species show open‐chain structures containing two oxo or hydroxo bridges between aluminum cations, thus forming linked octahedra,20 as illustrated for [Al 4 O 4 (OH) 2 Cl(H 2 O) 3 ] − in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

Identification of the hydrolysis products of AlCl₃·6H₂O by electrospray ionization mass spectrometry

et al. 2004

View full text Add to dashboard Cite

The hydrolysis reactions of AlCl3 in 0.1 M aqueous solutions at pH 3.27-4.20 were monitored by electrospray ionization time-of-flight mass spectrometry (ESI-ToF MS) as a function of time. The cationic and anionic ESI mass spectra of aluminum(III) solutions gave strong evidence of the presence of a variety of monomeric and polymeric complexes. Competition between the OH- and Cl- ligands within the same aluminum core was observed. The influence of the sample cone voltage on the product distribution was also explored. The optimum sample cone voltage for the cationic spectra was 70 V. For the anionic spectra no optimum sample cone voltage was found and the appearance of the anionic spectra was strongly dependent on the sample cone voltage within the whole range explored.

show abstract

Section: Resultsmentioning

confidence: 99%

Identification of the hydrolysis products of AlCl₃·6H₂O by electrospray ionization mass spectrometry

et al. 2004

View full text Add to dashboard Cite

show abstract

“…Chemical analysis showed 2.66 A1 atoms in interlayer per unit cell corresponding to either Keggin 5 + ions [AllaO4(OH)26(H20)10] 5+ (described by Johansson 1962) or to gibbsite-type double-ring sandwiches [A120(OH)54(H20)22] 6+. For structure models see Gapkovti et al (1998).…”

Section: Effects Leading To Diffraction Profile Distortionsmentioning

confidence: 99%

Characterization of Intercalated Smectites Using XRD Profile Analysis in the Low-Angle Region

Janeba

Čapková

Weiss

et al. 1998

Clays and clay miner.

View full text Add to dashboard Cite

Abstract---X-ray diffraction (XRD) characterization of natural and intercalated smectites is usually limited to the apparent d-value estimated from the peak maxima in the raw data. This can lead to the misinterpretation of the measured data. In the case of XRD, the interference function is modulated by instrumental factors (Lorentz-polarization factor, diffraction geometry) and physical factors (structure factor, surface roughness effect). These effects lead to diffraction profile distortions, depending on the diffraction angle and peak full width at half maximum (FWHM). As a result, the diffraction profiles for structures with large line broadening (FWHM > 1 ~ exhibit a significant peak shift (Ad --1.5 A), especially at low angles (20 --< 10~ The present work deals with the detailed analysis of all these effects, their corrections and their consequences for the interpretation of diffraction patterns (including possible errors in determining lattice parameters or the structure model). The investigated materials were montmorillonites (MMT) intercalated with hydroxy-A1 polymers. Diffraction profile analysis revealed the corrected d-values and showed that the intercalated sample is not a mixed-layered structure. As a result a structural model of the interlayer is presented.

show abstract

“…Studies of aqueous Al chemistry are notoriously difficult because of the variety and complexity of the species that can be formed, encompassing monomeric, oligomeric, and polymeric hydroxides (11)(12)(13)(14)(15)(16)(17); colloidal solutions and gels; and precipitates. Synthesis is complicated by the fact that the counter-ions and the method and rate of pH change all have dramatic effects on product formation (18,19).…”

mentioning

confidence: 99%

Electrolytic synthesis of aqueous aluminum nanoclusters and in situ characterization by femtosecond Raman spectroscopy and computations

Wang

Liu

Chang

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The selective synthesis and in situ characterization of aqueous Alcontaining clusters is a long-standing challenge. We report a newly developed integrated platform that combines (i) a selective, atomeconomical, step-economical, scalable synthesis of Al-containing nanoclusters in water via precision electrolysis with strict pH control and (ii) an improved femtosecond stimulated Raman spectroscopic method covering a broad spectral range of ca. T he importance of Al (aluminum) in the biosphere and to human civilization is enormous. The scale of mining and production of Al compounds is second only to that of Fe (iron). Our lives are influenced by its use in electronics (1, 2), cooking and eating utensils, and food packaging, and as structural materials in the construction, automotive, and aircraft industries. Its deposition and migration as a mineral ore are controlled by its aqueous chemistry and speciation. Millions of tons of Al compounds are used worldwide each year for water treatment, and it is found in all drinking water (3). The behavior of Al in water plays significant roles in soil chemistry and plant growth (4, 5), for example, governing Al bioavailability, toxicity, and its overall impact in aquatic ecosystems (6). Meanwhile, aqueous Al clusters are gaining importance as solution precursors for the large-area deposition of Al 2 O 3 coatings with broad technological applications (7,8).Despite more than a century of study (9, 10), the complete portrait of aqueous Al chemistry remains unclear. Studies of aqueous Al chemistry are notoriously difficult because of the variety and complexity of the species that can be formed, encompassing monomeric, oligomeric, and polymeric hydroxides (11-17); colloidal solutions and gels; and precipitates. Synthesis is complicated by the fact that the counter-ions and the method and rate of pH change all have dramatic effects on product formation (18,19). Few methods exist for the in situ determination and assignment of molecular-level structures. For instance, 27 Al NMR can only identify certain Al aqueous species (15). Furthermore, unlike organic compounds, systematic spectroscopic signatures of metal hydroxide clusters are less accessible, making interpretation of experimental spectra challenging. We hereby report a combined synthesis, experiment, and theory platform for the study of aqueous metal clusters. Electrolysis is exploited to control the solution pH and counter-ion content precisely during cluster synthesis without using chemical reagents. The evolution of solution species is followed in situ by an improved femtosecond stimulated Raman (FSR) technique (20-22) that can detect weak signals associated with structure-defining vibrational modes. The resulting pHdependent Raman spectra are interpreted by juxtaposition to quantum mechanically computed vibrational modes to assign specific molecular structures. Through this integrated approach, we have discovered a speciation behavior for Al in water that has not previously been observed. We focus here on the synthesis an...

show abstract

The Crystal Structures of [Al2(OH)2(H2O)8](SO4)2.2H2O and [Al2(OH)2(H2O)8](SeO4)2.2H2O.

Cited by 128 publications

References 0 publications

Identification of the hydrolysis products of AlCl₃·6H₂O by electrospray ionization mass spectrometry

Identification of the hydrolysis products of AlCl₃·6H₂O by electrospray ionization mass spectrometry

Characterization of Intercalated Smectites Using XRD Profile Analysis in the Low-Angle Region

Electrolytic synthesis of aqueous aluminum nanoclusters and in situ characterization by femtosecond Raman spectroscopy and computations

Contact Info

Product

Resources

About

The Crystal Structures of [Al2(OH)2(H2O)8](SO4)2.2H2O and [Al2(OH)2(H2O)8](SeO4)2.2H2O.

Cited by 128 publications

References 0 publications

Identification of the hydrolysis products of AlCl3·6H2O by electrospray ionization mass spectrometry

Identification of the hydrolysis products of AlCl3·6H2O by electrospray ionization mass spectrometry

Characterization of Intercalated Smectites Using XRD Profile Analysis in the Low-Angle Region

Electrolytic synthesis of aqueous aluminum nanoclusters and in situ characterization by femtosecond Raman spectroscopy and computations

Contact Info

Product

Resources

About

Identification of the hydrolysis products of AlCl₃·6H₂O by electrospray ionization mass spectrometry

Identification of the hydrolysis products of AlCl₃·6H₂O by electrospray ionization mass spectrometry