Kinetics of Phosphorescence Decay of the New Paramagnetic Osmium(IV) Tetra-Crown Porphyrinate in Polystyrene at Temperatures of 77 and 298 K

Chernyad’ev, A.Y.; Kotenev, V.A.; Tsivadze, A.Y.

Авторы: Chernyad’ev A.Yu, Kotenev V.A., Tsivadze A.Yu
Журнал: Protection of Metals and Physical Chemistry of Surfaces
Том: 56
Номер: 3
Год издания: 2020
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 505
Последняя страница: 509
Оригинальные версии: КИНЕТИКА ЗАТУХАНИЯ ФОСФОРЕСЦЕНЦИИ НОВОГО ПАРАМАГНИТНОГО ТЕТРА-КРАУН-ПОРФИРИНАТА ОСМИЯ(IV) В ПОЛИСТИРОЛЕ ПРИ ТЕМПЕРАТУРЕ 77 И 298 К
DOI: 10.1134/s2070205120030090
Аннотация: The reaction of osmium(II) tetra-15-crown-5-porphyrin (Os(II)TCP) with molecular iodine in high yield yielded the corresponding osmium(IV) porphyrin containing iodide ions in the axial positions of the osmium(IV) atom and possessing paramagnetic properties according to 1H NMR. The iodine anions in the complex create an additional heavy atom effect in addition to such an effect from the osmium(IV) cation, which is of certain interest from the point of view of increasing the probability of phosphorescence transitions in osmium(IV) crown porphyrin molecules. The paramagnetism of osmium(IV) crown porphyrin also affects the probability of phosphorescence transitions, and this effect depends on temperature. These two effects (paramagnetism and the heavy atom effect) create some interest in terms of the possibility of creating a phosphorescent temperature sensor based on the new osmium(IV) crown porphyrin. A comparative analysis of the kinetics of phosphorescence decay of osmium(IV), osmium(VI) and osmium(II) porphyrins in the polystyrene matrix at temperatures of 298 and 77 K. It was found that the new osmium(IV) crown porphyrin has the highest phosphorescence lifetime with temperature in this series and can be considered as a luminescent temperature sensor for changes in phosphorescence lifetime.
Добавил в систему: Котенев Владимир Анатольевич

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Kinetics of Phosphorescence Decay of the New Paramagnetic Osmium(IV) Tetra-Crown Porphyrinate in Polystyrene at Temperatures of 77 and 298 Kстатья Исследовательская статья

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