کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1410986 | 1501905 | 2007 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The dipeptide alanylphenylalanine (H-Ala-Phe-OH) - protonation and coordination ability with Au(III)
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
The dipeptide alanylphenylalanine (H-Ala-Phe-OH), its hydrochloride (HCl Ã H-Ala-Phe-OH) and Au(III)-complex have been characterized structurally. Quantum chemical DFT and ab initio calculations, solid-state linear-dichroic infrared (IR-LD) spectroscopy and 1H and 13C NMR data were employed. The results are confirmed by a single crystal X-ray diffraction analysis of HCl Ã H-Ala-Phe-OH. The coordination with Au(III) is supported by data from MS, TGV, DSC methods and by elemental analysis. The H-Ala-Phe-OH coordinates in a bidentate manner via an O-atom of the COOâ-group and N-amide nitrogen, after a previous deprotonation of the NH-group has taken place. Two Clâ ions are attached to the metal center as terminal ligands, yielding a completely planar geometry for the AuNOCl2 chromophor in the mononuclear [Au((H-Ala-Phe-OH)Hâ1)Cl2] complex.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 831, Issues 1â3, 17 April 2007, Pages 165-173
Journal: Journal of Molecular Structure - Volume 831, Issues 1â3, 17 April 2007, Pages 165-173
نویسندگان
B.B. Koleva, Ts. Kolev, S.Y. Zareva, M. Spiteller,