1. Synthesis of (sub)microcrystals of dinuclear terbium(III) carboxylate (Hpiv)6Tb2(piv)6 and polymeric terbium(III) carboxylate {Tb(piv)3}n in supercritical carbon dioxide. Photoluminescence and magnetic properties.
- Author
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Fomina, I.G., Mishakov, G.V., Krotova, L.I., Popov, V.K., Bagratashvili, V.N., Bogomyakov, A.S., Zavorotny, Yu. S., and Eremenko, I.L.
- Subjects
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TERBIUM , *MAGNETIC properties , *SUPERCRITICAL carbon dioxide , *POLYMERIC nanocomposites , *COORDINATION polymers , *PHOTOLUMINESCENCE , *SUPERCRITICAL fluids , *COMPLEX fluids - Abstract
• Coordination polymer {Tb(piv) 3 } n was prepared from complex (Hpiv) 6 Tb 2 (piv) 6 by sc-CO 2 processing. • Terbium carboxylates was prepared as single-phase (sub)microcrystals with a controlled size. • Polymer {Tb(piv) 3 } n can be prepared as polycrystalline aggregates with different morphologies. • Size of aggregates affects the photoluminescent and magnetic properties of terbium carboxylates. Supercritical fluid micronization by rapid expansion of supercritical solutions setup using supercritical carbon dioxide as a fluid and the dinuclear complex (Hpiv) 6 Tb 2 (piv) 6 (1) as the starting compound allows the preparation of either the single-phase dinuclear complex (Hpiv) 6 Tb 2 (piv) 6 (1a) or the coordination polymer {Tb(piv) 3 } n (2a , 2b , 2c) as (sub)microcrystals with a controlled size depending on the processing parameters. It was shown that {Tb(piv) 3 } n (2) can in principle be synthesized by supercritical carbon dioxide processing as polycrystalline particles with different morphologies. A decrease in the size of polycrystalline particles (aggregates) of 1 and 2 and an increase in the fraction of defects in the crystal structure, respectively, lead to an increase in the degree of photoluminescence quenching at these defects and a change in magnetic properties of 1. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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