Категория: Новости.
Sensors and Actuators A: Physical Vol. 325, 112722
https://doi.org/10.1016/j.sna.2021.112722
Luminescence thermometry became one of the most rapidly developing scientific areas in the last decade. A lot of scientific groups are working on the design of a highly sensitive and accurate thermometer based on monitoring the chosen luminescence parameter. However, it is still a challenge to create a multimode sensor utilizing several temperature-dependent parameters for thermometry, which could broaden the working range and improve thermometric characteristics. Here, we successfully demonstrate the binuclear helical charged complex [L3Cu2](BF4)2 (L = 1-pyridine-2-ylphospholane) in head-to-head configuration with solid-state single-band emission as a multimode optical thermometer. Thermal sensing was provided using luminescence intensity ratio, spectral line position, bandwidth, and lifetime. Ratiometric temperature determination was performed by the successful use of deconvolution analysis. The thermometric performance was studied in terms of relative thermal sensitivity, which was varied from 0.93 % K−1 for line position to 0.11 % K−1 for bandwidth at 298 K. The obtained results show Cu(I) complex as a cheap multimode luminescence thermal sensor in the 98–393 K range.
Категория: Новости.
by M. Galimova, T. Begaliev, E. Zueva, S. Kondrashova, S. Latypov, A. Dobrynin, I. Kolesnikov, R. Musin, E. Musina, A. Karasik
Inorg. Chem. 2021, 60, 9, 6804–6812
https://doi.org/10.1021/acs.inorgchem.1c00672
Synthesis and structural and photophysical characterization of platinum dihalogenide complexes formulated as [PtHal2L2], where Hal = Cl and I, with different 10-(aryl)phenoxarsine ligands such as 10-(p-chlorophenyl)phenoxarsine, 10-(p-tolyl)phenoxarsine, and 10-(phenyl)phenoxarsine are reported. The structures of complexes were determined by NMR spectroscopy, mass spectrometry, and X-ray analysis. Cis/trans isomerism of the complexes in solution was studied by NMR spectroscopy. In the solid state, under UV irradiation, platinum diiodide trans complexes exhibit an intense orange-red emission, which was attributed to a metal halide-centered triplet state. The UV/vis absorption and emission properties were studied and rationalized by density functional theory (DFT) and time-dependent DFT calculations.
Категория: Новости.
by I. Dayanova, A. Shamsieva, I. Strelnik, T. Gerasimova, I. Kolesnikov, R. Fayzullin, D. Islamov, A. Saifina, E. Musina, E. Hey-Hawkins, A. Karasik
Inorg. Chem. 2021, 60, 7, 5402–5411
https://doi.org/10.1021/acs.inorgchem.1c00442
The row of metallocyclic dinuclear gold(I) complexes with cyclic diphosphines, namely, P-pyridylethyl-substituted 1,5-diaza-3,7-diphosphacyclooctanes, has been obtained. Further interaction of the dinuclear gold(I) complexes with copper(I) iodide gave the first examples of hexanuclear AuI/CuI complexes containing two unusual trinuclear AuICu2I2 fragments. The structures of di- and hexanuclear complexes were confirmed by NMR spectroscopy, ESI mass spectrometry, elemental analysis, and single-crystal X-ray diffraction. All of the obtained complexes are moderate emitters in the solid state. Dinuclear gold(I) complexes displayed a greenish emission with the maxima in the emission spectra at ca. 550 nm. The obtained hexanuclear heterobimetallic AuI/CuI complexes are triplet solid-state blue emitters with the maximum in the emission spectra at 463 and 484 nm. According to the TD-DFT calculations, the observed emission of all studied complexes had a triplet origin and was caused by the 3CC or 3(MLCT) T1 → S0 transitions for dinuclear and hexanuclear complexes, respectively.
Категория: Новости.
Д.В. Панькин, М.В. Корогодина, А.В. Поволоцкая, A.A. Михайлова, В.Г. Подковырова, Е.А. Тилева, И.В. Цевелева, А.Г. Сергеев, А.В. Курочкин
Оптика и спектроскопия, 2021, том 129, вып. 1
DOI: 10.21883/OS.2021.01.50447.227-20
Исследована палитра пигментов, входящих в состав пергаменного рукописного фрагмента из собрания Финляндских отрывков № 29 (Библиотека Российской академии наук, Финл. отр. 29, старый шифр — 4.9.28), датируемой XIV в. Данная рукопись с полихромными изображениями, использованными для украшения заглавных букв текста, не проходила реставрацию. В рамках выполненной работы методами спектроскопии КРС было установлено использование киновари для красных оттенков, идентифицирована смесь сера мышьяковых пигментов (аурипигмент и парареальгар), а также установлено использование смеси пигмента индиго и гипса в различных соотношениях для синих оттенков. Проведено исследование возможности детектирования характерной люминесценции обнаруженных пигментов с реальных (немодельных) образцов, при возбуждении лазерным излучением различных длин волн.
(слева) Фотография декорированных заглавных букв, а так же части текста рукописного пергамена. (справа) Типичные спектры КРС красного пигмента – киновари и желтых – аурипигмента (b) и парареальгара (c)
Русский (РФ) 
English (UK) 