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Synthesis Mixtures (synthesis + mixture)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Solid-State NMR Characterization of the Mineral Searlesite and Its Detection in Complex Synthesis Mixtures.

CHEMINFORM, Issue 52 2001
Colin A. Fyfe
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Synthesis of Anatase TiO2 Nanoparticles with ,-Cyclodextrin as a Supramolecular Shell

CHEMISTRY - AN ASIAN JOURNAL, Issue 5 2006
Landong Li
Abstract We report a novel, green hydrothermal-synthesis route to well-dispersed anatase TiO2 nanoparticles with particle sizes of 9,16,nm in the presence of ,-CD (,-cyclodextrin). During the synthesis process, the CD-containing synthesis mixture assembled in both longitudinal and latitudinal directions. Driven by the interaction between molecules, the ,-CDs assembled in the longitudinal direction to form long-chain compounds, whereas in the latitudinal direction, they tended to form regular aggregates through coordination with the Ti species from the hydrolysis of tetrabutyl titanate. In view of the effect of the coordination and the steric hindrance of ,-CDs as a supramolecular shell, homogeneous nuclei and slow growth of TiO2 crystals during the synthesis process was observed, which was responsible for the formation of uniform TiO2 nanoparticles. The low ,-CD dosage and the high product yield (>90,%) demonstrated well the potential of this synthesis route in the large-scale industrial production of anatase nanoparticles. [source]

Moving window as a variable selection method in potentiometric titration multivariate calibration and its application to the simultaneous determination of ions in Raschig synthesis mixtures

JOURNAL OF CHEMOMETRICS, Issue 3 2009
Sheng Fang
Abstract A novel method based on moving window (MW) strategy has been proposed to simultaneously choose the optimal pH region and latent variables (LVs) number for partial least squares (PLS) regression in potentiometric titration multivariate calibration. In this method, the leave-one-out cross-validation with varying LVs number is run on different selected MW and, consequently, that revealing optimal results is selected. The method is applied to the simultaneous determination of H+, NH3OH+ and NH in Raschig synthesis mixtures, which is of industrial importance. A comparison in the modeling power of PLS is made between non-processed data set and data set processed by the MW method. Copyright © 2008 John Wiley & Sons, Ltd. [source]