scholarly journals First-principles calculation of 11B solid-state NMR parameters of boron-rich compounds II: the orthorhombic phases MgB7 and MgB12C2 and the boron modification γ-B28

2021 ◽  
Vol 23 (6) ◽  
pp. 3883-3897
Author(s):  
Martin Ludwig ◽  
Harald Hillebrecht

After referencing 11B NMR spectra for molecular icosahedral boranes and the subsequent transfer to boron-rich borides of the α-rB12 type, we show that NMR spectra of borides with four or five symmetry-independent boron atoms can also be calculated.

2016 ◽  
Vol 52 (45) ◽  
pp. 7186-7204 ◽  
Author(s):  
Sharon E. Ashbrook ◽  
David McKay

DFT calculations are an important tool in assigning and interpreting NMR spectra of solids: we discuss recent developments and their future potential in the context of NMR crystallography.


2012 ◽  
Vol 131 (3) ◽  
Author(s):  
Alfonso Pedone ◽  
Elisa Gambuzzi ◽  
Gianluca Malavasi ◽  
Maria Cristina Menziani

2021 ◽  
Vol 23 (1) ◽  
pp. 470-486
Author(s):  
Martin Ludwig ◽  
Harald Hillebrecht

This study reports on solid-state nuclear magnetic resonance spectra under magic angle spinning conditions of the rhombohedral structures α-B and B12P2 together with parameter sets from first principles calculations on α-B and B12X2 (X = P, As, O).


2007 ◽  
Vol 129 (43) ◽  
pp. 13213-13224 ◽  
Author(s):  
Sharon E. Ashbrook ◽  
Andrew J. Berry ◽  
Daniel J. Frost ◽  
Alan Gregorovic ◽  
Chris J. Pickard ◽  
...  

2004 ◽  
Vol 852 ◽  
Author(s):  
Eleonora Del Federico ◽  
Wolfgang Schoefberger ◽  
Rajeev Kumar ◽  
Wen Ling ◽  
Sofia M. Kapetanaki ◽  
...  

ABSTRACTWe report on a study of ultramarine pigments via Colorimetry, resonance Raman, and 27Al, 29Si solid-state NMR spectroscopy. NMR parameters are shown to correlate well with the intensities of Raman signals corresponding to the chromophores S3−. and S2−.. Further, a correlation is established between the colorimetric parameters L* (lightness) and C* (chromaticity) and the paramagnetic shift in NMR spectra for both 27Al and 29Si. The parameter h (hue) appeared not to vary over the range of paramagnetic host concentrations studied. Preliminary results on faded pigments in both acidic and basic media show that the concentration of diamagnetic guest molecules in the sodalite lattice rises, and some of the paramagnetic species are replaced.


2007 ◽  
Vol 9 (19) ◽  
pp. 2389 ◽  
Author(s):  
Andrew J. Robbins ◽  
William T. K. Ng ◽  
Dominik Jochym ◽  
Thomas W. Keal ◽  
Stewart J. Clark ◽  
...  

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