کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9588600 | 1506643 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preservation of endometallofullerene La@C82 in polycarbonate: EPR, ENDOR, and NMR studies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
On embedding in poly(bisphenol A carbonate) film, La@C82 has featured the exclusive stability against oxygen for more than 1 year's storage of the polymer films on air. The EPR spectral parameters of La@C82 have occurred to be sensitive to the segmental mobility and the phase transition of the polymer from the glassy to the high-elasticity state. Furthermore, the intense matrix 1H-electron nuclear double resonance (ENDOR) signal discovered in this system testifies the partial transfer of the electron spin density outside the fullerene cage onto the polymer protons. The 139La NMR spectrum of the same suggests that La@C82 forms nanoparticles, in which the metal atoms strongly interact with the delocalized electrons. The “spin-leakage” of the fullerene shell, along with the tendency of endohedral fullerenes (EMF) to form nanoparticles, is worth consideration in sight of their applications in material sciences.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 120, Issues 1â3, June 2005, Pages 151-154
Journal: Journal of Molecular Liquids - Volume 120, Issues 1â3, June 2005, Pages 151-154
نویسندگان
V.K. Koltover,