کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7806594 | 1501644 | 2019 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, X-ray crystal structure and spin polarized DFT study of high spin Mn based metal-organic framework
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
Theoretical modeling of the geometries of metal-organic frameworks is quite challenging. In order to compare the geometry obtained through density functional theory (DFT) calculations with the one obtained experimentally, a hydrothermal reaction of the potassium salt of 1,1-cyclopentane diacetic acid (L) with MnCl2·2H2O in the presence of 4,4â²-bipyridine (bpy) was carried out which formulated a two dimensional metal-organic framework [Mn2(L)2(bpy)2(H2O)2]nâ6H2O. Single crystal X-ray diffraction analysis reveals that the compound crystallized in the centrosymmetric monoclinic space group P 2/n. The presence of solvate water molecules of crystallization offer hydrogen bond formation and result the connection of 2-D sheets into 3-D hydrogen bonded metal-organic framework. The manganese atom can have a maximum of sextet spin state (five unpaired electrons). Single point energies were calculated at M05-2X/6-31G (d,p) for different spin states (up to 11 et) of the high energy framework and it was elucidated that the 11et spin stat is the lowest energy spin state.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1175, 5 January 2019, Pages 439-444
Journal: Journal of Molecular Structure - Volume 1175, 5 January 2019, Pages 439-444
نویسندگان
Saghir Abbas, Khurshid Ayub, Manzar Sohail, Saqib Ali, Ralf Ludwig, Muhammad Arif Nadeem, Shabbir Muhammad,