کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1812286 | 1025612 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ammonia adsorption on the C30B15N15 heterofullerene: DFT study of nuclear magnetic shielding and electric field gradient tensors of N and B nuclei
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ammonia adsorption on the external surface of C30B15N15 heterofullerene was studied using density functional calculations. Three models of the ammonia-attached C30B15N15 together with the perfect model were optimized at the B3LYP/6-31Gâ level. The optimization process reveals that dramatic influences occurred for the geometrical structure of C30B15N15 after ammonia adsorption; the B atom relaxes outwardly and consequently the heterofullerene distorts from the spherical form in the adsorption sites. The chemical shielding (CS) tensors and nuclear quadrupole coupling constants of B and N nuclei were calculated at the B3LYP/6-311G** level. Our calculations reveal that the B atom is chemically bonded to NH3 molecule. The B atom in the NH3-attached form has the largest chemical shielding isotropic (CSI) value among the other boron nuclei. The CQ parameters of B nuclei at the interaction sites are significantly decreased after ammonia adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 406, Issue 8, 1 April 2011, Pages 1592-1597
Journal: Physica B: Condensed Matter - Volume 406, Issue 8, 1 April 2011, Pages 1592-1597
نویسندگان
Ehsan Zahedi,