کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1519020 | 1511627 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solid state NMR studies of covalent graphite fluorides (CF)n and (C2F)n
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Solid state NMR studies of covalent graphite fluorides (CF)n and (C2F)n Solid state NMR studies of covalent graphite fluorides (CF)n and (C2F)n](/preview/png/1519020.png)
چکیده انگلیسی
Various covalent graphite fluorides were studied using solid state nuclear magnetic resonance (NMR). 19F magic angle spinning (MAS) NMR, 13C MAS NMR and 13C MAS NMR with 19F to 13C Cross Polarization (CP) allow both the presence of CF and CF2 groups and the carbon atoms hybridization, sp2 or sp3, to be determined. 19F spin–lattice relaxation time T1 of the 19F line is presented. The effects of paramagnetic centers on the relaxation were evaluated. Paramagnetic oxygen is shown to be an important source of relaxation. The presence of a molecular motion with an activation energy of 1.685 kJ mol−1 is also evidenced for one of the (CF)n sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issues 5–6, May–June 2006, Pages 1100–1105
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issues 5–6, May–June 2006, Pages 1100–1105
نویسندگان
Jérôme Giraudet, Marc Dubois, Katia Guérin, André Hamwi, Francis Masin,