scholarly journals Importance of Purity Evaluation and the Potential of Quantitative1H NMR as a Purity Assay

2014 ◽  
Vol 57 (22) ◽  
pp. 9220-9231 ◽  
Author(s):  
Guido F. Pauli ◽  
Shao-Nong Chen ◽  
Charlotte Simmler ◽  
David C. Lankin ◽  
Tanja Gödecke ◽  
...  
Keyword(s):  
Purity Evaluation ◽  
Purity Assay

scholarly journals Correction to Importance of Purity Evaluation and the Potential of Quantitative 1H NMR as a Purity Assay

2015 ◽  
Vol 58 (22) ◽  
pp. 9061-9061
Author(s):  
Guido F. Pauli ◽  
Shao-Nong Chen ◽  
Charlotte Simmler ◽  
David C. Lankin ◽  
Tanja Gödecke ◽  
...  
Keyword(s):  
1H Nmr ◽  
Purity Evaluation ◽  
Purity Assay

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes

Structural and spectroscopic investigations on the quenching free luminescence of europium oxalate nanocrystals

2019 ◽  
Vol 75 (5) ◽  
pp. 589-597 ◽  
Author(s):  
Dinu Alexander ◽  
Kukku Thomas ◽  
Monu Joy ◽  
P. R. Biju ◽  
N. V. Unnikrishnan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Focal Point ◽  
Structural Features ◽  
Crystal Structure Analysis ◽  
Precipitation Method ◽  
Tem Analysis ◽  
Transmission Electron ◽  
Purity Evaluation ◽  
Co Precipitation

The structural features leading to the intense quenching free luminescence exhibited by europium oxalate nanocrystals, poly[[hexaaquatri-μ2-oxalato-dieuropium] 4.34-hydrate], {[Eu2(C2O4)3(H2O)6]·4.34H2O} n , is the focal point of this report. Europium oxalate nanocrystals were synthesized by a simple microwave-assisted co-precipitation method. Powder X-ray diffraction analysis revealed the monoclinic structure of the nanocrystals and the phase purity. The morphology and particle size were examined by transmission electron microscopy (TEM) analysis. Luminescence measurements on a series of samples of La2–x Eu x (C2O4)3·10H2O, with x varying in the range 0.1 to 2, established the quenching free nature exhibited by the europium oxalate nanocrystals. A single-crystal structure analysis was carried out and the quenching free luminescence is explained on the basis of the crystal structure. A detailed photoluminescence characterization was carried out using excitation and emission studies, decay analysis, and CIE coordinate and colour purity evaluation. The various spectroscopic parameters were evaluated by Judd–Ofelt theoretical analysis and the results are discussed on the basis of the crystal structure analysis.

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