Тип публикации: статья из журнала

Год издания: 2025

Идентификатор DOI: 10.1002/chem.202502070

Аннотация: <jats:title>Abstract</jats:title> <jats:p> This work encompasses the study of magnetic, optical, and structural properties of the coordination compounds [Ln(MeDPQ) <jats:sub>2</jats:sub> Cl <jats:sub>3</jats:sub> ] (Ln ─ Ho <jats:sup>3+</jats:sup>, Er <jats:sup>3+</jats:sup>, Dy <jats:sup>3+</jats:sup>, and Y <jats:sup>3+</jats:supПоказать полностью> ; MeDPQ − 2-methyldipyrido-[3,2-f:2′,3′-h]-quinoxaline) and substituted complexes [Ln <jats:sub>1-</jats:sub> <jats:italic> <jats:sub>x</jats:sub> </jats:italic> Dy <jats:italic> <jats:sub>x</jats:sub> </jats:italic> (MeDPQ) <jats:sub>2</jats:sub> Cl <jats:sub>3</jats:sub> ] (Ln = Ho <jats:sup>3+</jats:sup>, Er <jats:sup>3+</jats:sup>, and Y <jats:sup>3+</jats:sup> ) based on them. Magnetic measurements within the range 5–300 K revealed single ion anisotropy in [Dy(MeDPQ) <jats:sub>2</jats:sub> Cl <jats:sub>3</jats:sub> ], with the Curie-Weiss temperature <jats:italic>θ</jats:italic> being −3.69 ± 0.03 K. Complexes of Ho <jats:sup>3+</jats:sup> and Er <jats:sup>3+</jats:sup> exhibited <jats:italic>f</jats:italic> – <jats:italic>f</jats:italic> emission in the visible range, while the latter was also emissive in the NIR. Dilution of the Dy <jats:sup>3+</jats:sup> complex with diamagnetic Y <jats:sup>3+</jats:sup> ions resulted in alterations of magnetic and photophysical properties. The substituted complexes Y <jats:sub>0.5</jats:sub> Dy <jats:sub>0.5</jats:sub> and Y <jats:sub>0.9</jats:sub> Dy <jats:sub>0.1</jats:sub> demonstrated paramagnetic behavior, with <jats:italic>θ</jats:italic> being 3.06 ± 0.12 K and 9.64 ± 0.23 K, respectively. In both cases, the emission decay times of Dy <jats:sup>3+</jats:sup> changed insignificantly, 21.02 ± 0.41 µs and 14.56 ± 0.22 µs, respectively, compared to the value (18.92 ± 0.03 µs) of the individual Dy <jats:sup>3+</jats:sup> complex. Additional ligand-based emission bands were observed in the Ho <jats:sup>3+</jats:sup> and Er <jats:sup>3+</jats:sup> complexes at room temperature and 77 K and in the substituted complexes Ho <jats:sub>0.5</jats:sub> Dy <jats:sub>0.5</jats:sub> and Er <jats:sub>0.5</jats:sub> Dy <jats:sub>0.5</jats:sub> at room temperature, which were assigned to the exciplex states. The thermal stability of [Er <jats:sub>0.5</jats:sub> Dy <jats:sub>0.5</jats:sub> (MeDPQ) <jats:sub>2</jats:sub> Cl <jats:sub>3</jats:sub> ] was determined to be the same as for the individual complexes, starting to oxidize at 410°C. </jats:p>

Журнал: Chemistry

Выпуск журнала: Т. 31, № 66

Номера страниц: 02070

ISSN журнала: 09476539

Издатель: Wiley Interscience

• Zhernakov Maksim A. (Kazan Federal University)
• Denisenko Yuriy G. (Department of Construction Materials Industrial University of Tyumen Tyumen 625000 Russia)
• Batulin Ruslan G. (Institute of Physics Kazan Federal University Kremlevskaya St., 18 Kazan 420008 Russia)
• Mirzayanov Ildar.I. (Department of Analytical Chemistry Certification and Quality Management Institute of Petroleum Chemistry and Nanotechnologies Kazan National Research Technological University Karl Marx St., 68 Kazan 420015 Russia)
• Sultanova Elza D. (Kazan Federal University)
• Molokeev Maxim S. (Department of Physics Far Eastern State Transport University Serysheva St. 47 Khabarovsk 680021 Russia)
• Burilov Vladimir A. (Kazan Federal University)
• Shtyrlin Valery G. (Kazan Federal University)
• Müller-Buschbaum Klaus (Center for Materials Research (LaMa) Justus-Liebig-University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany)

• Ядро РИНЦ (eLIBRARY.RU)