Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Formation, structure and properties of fluoro-sulfo-phosphate poly-anionic glasses
Δημιουργός/Συγγραφέας:	Le Q.H. Palenta T. Benzine O. Griebenow K. Limbach R. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Wondraczek L.
Εκδότης:	Elsevier B.V.
Ημερομηνία:	2017
Γλώσσα:	Αγγλικά
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2017.09.043
Περίληψη:	Phosphate glasses exhibit high solubility for secondary anion species. This includes sulfate, fluoride or nitride ions, and enables the preparation of poly-anionic glasses. Here, we consider fluoro-sulfo-phosphates. We show that in this system, even equimolar anion mixing can be achieved without notably compromising the glass forming ability. The derived glasses exhibit surprising stability, what enables the fabrication of bulk samples mostly without the need to employ rapid quenching techniques. In terms of molecular structure, they rely on primarily ionic bonding among the different constituents, whereby the fluoride and sulfate anions seem to act as stabilizing ionic cross-linkers between highly-depolymerized phosphate entities. Investigation of the low-frequency Raman scattering indicates characteristic variations on intermediate-range structure, where a shift in the Boson peak appears to correlate inversely with increasing sulfate content. We discuss this observation in terms of the low level of bond localization and low field strength of the sulfate anion relative to phosphate Q0 groups. Adjusting the degree of anion competition enables to tailor super-structural heterogeneity. Beyond this, the glass system provides an interesting variety of ligand situations for the potential incorporation of optically active cation species.
Τίτλος πηγής δημοσίευσης:	Journal of Non-Crystalline Solids
Τόμος/Κεφάλαιο:	477
Σελίδες:	58-72
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Anion mixing Fluoride Multi-anion Phosphate Sulphate
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2017 The Authors
Όροι και προϋποθέσεις δικαιωμάτων:	All Open Access, Hybrid Gold
Σημειώσεις:	Horizon 2020 Framework Programme, H2020: 681652; European Research Council, ERC; Horizon 2020 This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (ERC grant UTOPES, grant agreement no. 681652 ). HQL is grateful to the Vietnam International Education Development (VIED) of the Ministry of Education and Training of Vietnam for financial support.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο