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Title: Vibrational spectra and H-bondings in anhydrous and monohydrate {alpha}-Zr phosphates

Abstract

A new FTIR and FT-Raman investigation on {alpha}-zirconium phosphate (Zr(HPO{sub 4}){sub 2}.H{sub 2}O) and its anhydrous form has been performed in order to obtain an affordable assignment of their vibrational spectra as well as to highlight the hydrogen bonding structure formed by the P-OH groups and the intercalated water molecules. To this end the spectral changes induced by both temperature and isotopic exchange were observed on several high-purity grade samples of different morphology especially prepared and well characterized by SEM, RX, DSC and TGA. In particular, it is also presented as a detailed discussion of the results obtained by FTIR-PAS for different sample morphology. The observed spectra have been analyzed and interpreted according to the {alpha}-Zr(HPO{sub 4}){sub 2}.H{sub 2}O crystal structure and H-bond geometry. The obtained results allowed to clarify the mechanism of the {alpha}-Zr(HPO{sub 4}){sub 2}.H{sub 2}O{sup {yields}}{alpha}-Zr(HPO{sub 4}){sub 2} dehydration process as well as the H-bonding changes involved in the high temperature phase transition of anhydrous {alpha}-Zr(HPO{sub 4}){sub 2}. - Graphical abstract: A detailed analysis of the vibrational spectra of {alpha}-zirconium phosphates allowed to obtain an affordable band assignment highlighting the hydrogen bonding structure formed by the P-OH groups and the intercalated water molecules, the dehydration mechanism andmore » the changes in the interlayer region induced by the {alpha} to {beta} phase transition.« less

Authors:
 [1];  [1];  [1];  [2];  [3]
  1. Dipartimento di Chimica and CEMIN, Centro di Eccellenza Materiali Innovativi Nanostrutturati, Universita di Perugia, Via Elce di Sotto, 8. 06123 Perugia (Italy)
  2. Dipartimento di Chimica e Chimica Industriale, Universita di Genova, Via Dodecaneso 31. 16146 Genova (Italy), E-mail: piaggio@chimica.unige.it
  3. Dipartimento di Chimica e Chimica Industriale, Universita di Genova, Via Dodecaneso 31. 16146 Genova (Italy)
Publication Date:
OSTI Identifier:
21015765
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 4; Other Information: DOI: 10.1016/j.jssc.2007.01.016; PII: S0022-4596(07)00035-7; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AMINO ACIDS; CALORIMETRY; CRYSTAL STRUCTURE; FOURIER TRANSFORMATION; HYDRATES; INFRARED SPECTRA; ISOTOPIC EXCHANGE; MORPHOLOGY; PHASE TRANSFORMATIONS; SCANNING ELECTRON MICROSCOPY; THERMAL GRAVIMETRIC ANALYSIS; ZIRCONIUM PHOSPHATES; ZIRCONIUM-ALPHA

Citation Formats

Casciola, Mario, Donnadio, Anna, Montanari, Francesca, Piaggio, Paolo, and Valentini, Valeria. Vibrational spectra and H-bondings in anhydrous and monohydrate {alpha}-Zr phosphates. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2007.01.016.
Casciola, Mario, Donnadio, Anna, Montanari, Francesca, Piaggio, Paolo, & Valentini, Valeria. Vibrational spectra and H-bondings in anhydrous and monohydrate {alpha}-Zr phosphates. United States. doi:10.1016/j.jssc.2007.01.016.
Casciola, Mario, Donnadio, Anna, Montanari, Francesca, Piaggio, Paolo, and Valentini, Valeria. Sun . "Vibrational spectra and H-bondings in anhydrous and monohydrate {alpha}-Zr phosphates". United States. doi:10.1016/j.jssc.2007.01.016.
@article{osti_21015765,
title = {Vibrational spectra and H-bondings in anhydrous and monohydrate {alpha}-Zr phosphates},
author = {Casciola, Mario and Donnadio, Anna and Montanari, Francesca and Piaggio, Paolo and Valentini, Valeria},
abstractNote = {A new FTIR and FT-Raman investigation on {alpha}-zirconium phosphate (Zr(HPO{sub 4}){sub 2}.H{sub 2}O) and its anhydrous form has been performed in order to obtain an affordable assignment of their vibrational spectra as well as to highlight the hydrogen bonding structure formed by the P-OH groups and the intercalated water molecules. To this end the spectral changes induced by both temperature and isotopic exchange were observed on several high-purity grade samples of different morphology especially prepared and well characterized by SEM, RX, DSC and TGA. In particular, it is also presented as a detailed discussion of the results obtained by FTIR-PAS for different sample morphology. The observed spectra have been analyzed and interpreted according to the {alpha}-Zr(HPO{sub 4}){sub 2}.H{sub 2}O crystal structure and H-bond geometry. The obtained results allowed to clarify the mechanism of the {alpha}-Zr(HPO{sub 4}){sub 2}.H{sub 2}O{sup {yields}}{alpha}-Zr(HPO{sub 4}){sub 2} dehydration process as well as the H-bonding changes involved in the high temperature phase transition of anhydrous {alpha}-Zr(HPO{sub 4}){sub 2}. - Graphical abstract: A detailed analysis of the vibrational spectra of {alpha}-zirconium phosphates allowed to obtain an affordable band assignment highlighting the hydrogen bonding structure formed by the P-OH groups and the intercalated water molecules, the dehydration mechanism and the changes in the interlayer region induced by the {alpha} to {beta} phase transition.},
doi = {10.1016/j.jssc.2007.01.016},
journal = {Journal of Solid State Chemistry},
number = 4,
volume = 180,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}