Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2019

Идентификатор DOI: 10.1002/zaac.201900204

Ключевые слова: Rare earth fluoride, Rare earth sulfide, Rare earth compounds, Solid solution, Upconversion

Аннотация: Rare earth fluorides are mainly obtained from aqueous solutions of oxygen-containing precursors. Probably, this method is simple and efficient, however, oxygen may partially be retained in the fluoride structure. We offer an alternative method: obtaining fluorides and solid solutions based on them from an oxygen-free precursor. As starting materials, we choose sulfides of rare-earth elements and solid solutions based on them. The fluorination is carried out by exposure to hydrofluoric acid of various concentrations. The transmission electron microscopy images revealed the different morphologies of the products, which depend on the concentration of the fluorinating component (HF) and the host element. The solid solution particle size varied from 30-35 nm in the case of GdF3:Yb3+, Tm3+ (4 % HF) to larger structures with dimensions exceeding 200 nm, such as that for LaF3:Yb3+, Ho3+ (40 % HF). The thermal characteristics, such as the temperatures of the transitions and melting and enthalpies, were determined for the solid solutions and simple fluorides. Applicability of the materials obtained as biological luminescent markers was tested on the example of upconversion luminescence, and good upconversion properties were detected.

Журнал: ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE

Выпуск журнала: Vol. 645, Is. 24

Номера страниц: 1393-1401

ISSN журнала: 00442313

Место издания: WEINHEIM

Издатель: WILEY-V C H VERLAG GMBH

• Razumkova Illariia A. (Tyumen State Univ, Dept Inorgan & Phys Chem, 6 Volodarskogo St, Tyumen 625003, Russia)
• Denisenko Yuriy G. (Tyumen State Univ, Dept Inorgan & Phys Chem, 6 Volodarskogo St, Tyumen 625003, Russia; Ind Univ Tyumen, Dept Gen & Special Chem, 38 Volodarskogo St, Tyumen 625000, Russia)
• Boyko Andrey N. (Tyumen State Univ, Dept Inorgan & Phys Chem, 6 Volodarskogo St, Tyumen 625003, Russia)
• Ikonnikov Denis A. (RAS, Kirensky Inst Phys Fed Res Ctr KSC SB, Lab Coherent Opt, Krasnoyarsk 660036, Russia)
• Aleksandrovsky Aleksandr S. (RAS, Kirensky Inst Phys Fed Res Ctr KSC SB, Lab Coherent Opt, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, RussiaArticleEarly Access)
• Azarapin Nikita O. (Tyumen State Univ, Dept Inorgan & Phys Chem, 6 Volodarskogo St, Tyumen 625003, Russia)
• Andreev Oleg (Tyumen State Univ, Dept Inorgan & Phys Chem, 6 Volodarskogo St, Tyumen 625003, Russia)

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