کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
29559 44422 2016 7 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Ionization of vitamin C in gas phase: Theoretical study
ترجمه فارسی عنوان
یونیزاسیون ویتامین C در فاز گازی: مطالعه نظری
کلمات کلیدی
انرژی یونیزاسیون؛ ویتامین سی؛ SAC-CIR-SD-؛ طیف فوتوالکترون؛ NBO
Ionization energy; Vitamin C; SAC-CIR-SD-; Photoelectron spectrum; NBO
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی


• Gas phase ionization energies of vitamin C were calculated.
• The photoelectron spectra of different conformers of vitamin C were simulated.
• Five ionization energies were calculated for each conformer of vitamin C.
• The spectral bands of each conformer were assigned by NBO calculations.
• The first ionization band of vitamin C is related to the π electrons of C = C bond.

In this work, the gas phase ionization energies and photoelectron spectra of four important conformers of vitamin C were calculated. Symmetry adapted cluster/configuration interaction methodology employing the single and double excitation operators (SAC-CI SD-R) along with D95 ++(d,p) basis set were used for the calculations. Thermochemistry calculations were also performed on all possible conformers of vitamin C to find the relative stability of conformers in the gas phase. The calculated ionization bands of each conformer were assigned by calculating the contribution of natural bonding orbital (NBO) in the calculated canonical molecular orbitals involved in the ionization. SAC-CI calculations showed that the first ionization band of vitamin C is related to the π electrons of CC bond of the ring of molecule although, there is the lone electron pairs of oxygen atoms and π electrons of CO bond in the molecule.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 160, July 2016, Pages 11–17
نویسندگان
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