Environmentally friendly flame retardants. A detailed solid-state NMR study of melamine orthophosphate
Publication year
2007Source
Magnetic Resonance in Chemistry, 45, S1, (2007), pp. S231-S246ISSN
Related links
Publication type
Article / Letter to editor
Display more detailsDisplay less details
Organization
Solid State NMR
Former Organization
Physical Chemistry/Solid State NMR
Journal title
Magnetic Resonance in Chemistry
Volume
vol. 45
Issue
iss. S1
Page start
p. S231
Page end
p. S246
Subject
Solid State NMRAbstract
We used solid-state NMR spectroscopy to gain detailed information about the proton positions, proximities and the hydrogen-bonding network in the environmentally friendly flame retardant melamine orthophosphate (MP). High-resolution proton one- and two-dimensional solid-state NMR spectra were obtained at high external magnetic field in combination with fast magic angle spinning of the sample. Furthermore, we recorded homo- and heteronuclear correlation spectra of types (15)N--(15)N, (1)H--(13)C, (1)H--(15)N and (1)H--(31)P. In addition, we determined the geometry of the NH and NH(2) groups in MP by (15)N--(1)H heteronuclear recoupling experiments. We were able to completely assign the different isotropic chemical shifts in MP. Furthermore, we could identify the protonation of the melamine and orthophosphate moieties. The experimental results are discussed in connection with the structural model obtained by powder X-ray diffraction together with a combined molecular modeling-Rietveld refinement approach (De Ridder et al. Helv. Chim. Acta 2004; 87: 1894). We show that the geometry of the NH(2) groups can only be successfully estimated by solid-state NMR. Copyright (c) 2007 John Wiley & Sons, Ltd.
This item appears in the following Collection(s)
- Academic publications [245054]
- Electronic publications [132354]
- Faculty of Science [37365]
- Open Access publications [105958]
Upload full text
Use your RU credentials (u/z-number and password) to log in with SURFconext to upload a file for processing by the repository team.