New Insight into Titanium–Magnesium Ziegler–Natta Catalysts with Photoluminescence Spectroscopy
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Applied Spectroscopy
ISSN: 0003-7028
, E-ISSN: 1943-3530
|
| Вых. Данные |
Год: 2020,
Том: 74,
Номер: 10,
Страницы: 1209-1218
Страниц
: 10
DOI:
10.1177/0003702820927434
|
| Ключевые слова |
Titanium–magnesium catalysts, MgCl2, TiCl4, dibutyl phthalate, infrared spectroscopy, infrared, IR, photoluminescence spectroscopy |
| Авторы |
Panchenko Valentina N.
1
,
Kostyukov Anton I.
2
,
Shabalin Anton Yu.
1
,
Paukshtis Evgeniy A.
1
,
Glazneva Tatiana S.
1
,
Kazarian Sergei G.
1,3
|
| Организации |
| 1 |
Boreskov Institute of Catalysis, Novosibirsk, Russia
|
| 2 |
Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
|
| 3 |
Department of Chemical Engineering, Imperial College London, London, UK
|
|
Информация о финансировании (1)
|
1
|
Министерство науки и высшего образования Российской Федерации
|
075-15-2019-1876
|
This article presents the results of study of titanium-magnesium catalysts often used in polymerization processes, by photoluminescence spectroscopy (PL) in combination with diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. The interaction of dibutyl phthalate (DBP) with MgCl2 was studied at DBPadded/Mg = 0-1 (mol/mol). The luminescence spectra were recorded with excitation at 278 nm, and the excitation spectra with emission at 488 nm. It was shown that DBP adsorbed on magnesium chloride, both in the form of donor-acceptor complexes (D+A-) and in the form of molecular complexes. At DBPadded/Mg <0.15, the formation of D+A- complexes occurs predominantly; with an increase in DBPadded/Mg, the fraction of molecular complexes increases. Molecular complexes are destroyed during the treatment of the support by TiCl4. In this case, the structure of magnesium chloride is disordered and new coordination-unsaturated sites are formed. This work is a first attempt to apply PL spectroscopy in combination with DRIFT spectroscopy to study titanium-magnesium Ziegler-Natta catalysts. The application of PL spectroscopy to such systems made it possible to detect interactions within and between donor molecules, which would be very challenging to achieve using other spectroscopic methods. Both spectroscopic methods provided a crucial information about the existence of two types of complexes on the sample surface which is important for tuning the synthesis procedure of the titanium-magnesium catalysts for olefin polymerization.