کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9756973 | 1495289 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Metal-water interactions and hydrogen bonding in dittmarite-type compounds Mâ²Mâ³PO4·H2O (Mâ²Â = K+, NH4+; Mâ³Â = Mn2+, Co2+, Ni2+)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Metal-water interactions and hydrogen bonding in dittmarite-type compounds Mâ²Mâ³PO4·H2O (Mâ²Â = K+, NH4+; Mâ³Â = Mn2+, Co2+, Ni2+) Metal-water interactions and hydrogen bonding in dittmarite-type compounds Mâ²Mâ³PO4·H2O (Mâ²Â = K+, NH4+; Mâ³Â = Mn2+, Co2+, Ni2+)](/preview/png/9756973.png)
چکیده انگلیسی
The vibrational behavior of the uncoupled νOD modes and of the water librations in dittmarite-type compounds Mâ²Mâ³PO4·H2O (Mâ²Â = K+, NH4+; Mâ³Â = Mn2+, Co2+, Ni2+) is analyzed in terms of the influence of two types of metalâwater interactions (M+âH2O and M2+âH2O), the hydrogen bonding and the repulsion potential of the lattices. The M+âH2O interaction is found to be the main factor, which influences νOD. The strong K+âH2O interaction weakens in a higher degree the intramolecular OâH bonds than the corresponding M2+âH2O interactions (M2+ = Mn, Co, Ni). As a result νOD is shifted to lower wavenumbers in the potassium series than in ammonium one, irrespective of the synergetic effect of M2+, the hydrogen bond lengths and the repulsion potential of the lattices. The analysis of the spectroscopic data evidences for the dominating influence of the M2+âH2O interaction on the wagging mode. The blue shift of νwag strictly follows the increasing synergetic effect of M2+, i.e. νMâ²/Mn < νMâ²/Co < νMâ²/Ni, in all cases, irrespective of the strength of the M+âH2O interactions, the hydrogen bond lengths and the higher repulsion potential of the K-lattices. The rocking mode is insensitive to the replacement of the M2+ ions. Some relations between the spectroscopic and structural data are given.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 62, Issues 4â5, December 2005, Pages 1196-1202
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 62, Issues 4â5, December 2005, Pages 1196-1202
نویسندگان
Violeta G. Koleva,