Zhuravlev Konstantin P., Michnik Łukasz, Gawryszewska Paula, Tsaryuk Vera I., Kudryashova Valentina A. Europium and terbium pyrrole-2-carboxylates: Structures, luminescence, and energy transfer. Inorganica Chimica Acta , 2019 , 492. С. 1-7. ISSN 00201693
Полный текст не доступен из этого репозитория.Аннотация
Lanthanide pyrrole-2-carboxylates [{Ln(L)3(H2O)2}·H2O]n (Ln = Eu, Gd, Tb) were synthesized and investigated using single crystal X-ray diffraction and optical spectroscopy (luminescence, luminescence excitation and vibrational IR spectra). The europium pyrrole-2-carboxylate crystallizes as a 2D network structure in the P21/c space group. The Eu3+ coordination polyhedron formed by five carboxylic groups and two water molecules can be described as a distorted single-capped square antiprism. The luminescence spectra indicate a low symmetry of the charge distribution around the Ln3+ ion that corresponds to the C1 symmetry of the coordination environment of Eu3+ ion in the [{Eu(L)3(H2O)2}·H2O]n crystal lattice. The low-energy ligand–metal charge transfer (LMCT) state was identified in the europium compound. The shortening of the 5D0 (Eu3+) lifetime in the 230–295 K temperature region, when the compound is heated from 77 to 295 K, and the low luminescence intensity of the europium pyrrole-2-carboxylate are caused by the participation of the LMCT state in quenching processes. The energy of activation determined for the 5D0 – LMCT crossover is 3900 ± 100 cm−1.
| Тип объекта: | Статья |
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| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | К.П. Журавлев, Л. Мичник, П. Гавришевская, В.И. Царюк, В.A. Кудряшова |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 215 лаб. проблем субмикронной технологии |
| URI: | http://cplire.ru:8080/id/eprint/9292 |
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