Stability of Porous Liquids Based on ZIF-8 Framework and Ionic Liquid/Water Mixtures: a Spin-Probe EPR Study | Sciact - CRIS-система Института катализа

Stability of Porous Liquids Based on ZIF-8 Framework and Ionic Liquid/Water Mixtures: a Spin-Probe EPR Study Научная публикация

Журнал

Journal of Molecular Liquids
ISSN: 0167-7322 , E-ISSN: 1873-3166

Вых. Данные

Год: 2025, Том: 438, Номер: Part A, Номер статьи : 128640, Страниц : 8 DOI: 10.1016/j.molliq.2025.128640

Ключевые слова

Porous liquids, Ionic liquids, MOF, EPR spectroscopy, ZIF-8

Авторы

Gulyaev Sergey A. ^1,2 , Bakulina Olga D. ^1,2 , Poryvaev Artem S. ¹ , Yazikova Anastasiya A. ^1,2 , Smirnova Kristina A. ^1,2 , Prikhod’ko Sergey A. ³ , Sagdeev Renad Z. ¹ , Adonin Nicolay Yu. ³ , Fedin Matvey V. ^1,2

Организации

1	International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
2	Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
3	Boreskov Institute of Catalysis SB RAS, Lavrentiev Avenue 5, 630090 Novosibirsk, Russia

Информация о финансировании (1)

Российский научный фонд

24-13-00119 (124071600032-2)

Porous liquids (PL) emerge as a new class of materials for multifunctional applications, and type-III PLs consisting of metal-organic frameworks (MOFs) dispersed in liquids attract particular attention. They are easy to prepare and functionalize; however, the stability of such media is a significant challenge. In this work we employ Electron Paramagnetic Resonance (EPR) to investigate stability of PLs based on ZIF-8 framework micro/nanoparticles and mixtures of water with ionic liquid (IL) [Bmim]BF4. For this sake, stable nitroxide radical TEMPO was permanently encapsulated into ZIF-8, which allows monitoring the dissolution of MOF and solvent penetration into its pores vs. time using EPR. It has been found that most stable PLs are obtained with ZIF-8 dispersed in pure IL or pure water: these PLs remain intact up to 95 % in two days following their preparation. However, PLs prepared with IL/water mixtures suffered from drastically enhanced MOF dissolution rates due to their lower pH, resulting in much lower lifetimes. In all these cases, the penetration of liquid into pores was negligible, while the main factor affecting stability was the dissolution of MOF particles, which could be precisely followed by in situ EPR. Thus, this work provides general and effective tools to investigate stability of PLs using spin-probe EPR approach and reveals new rational strategies for adjusting type-III PL compositions toward their practical applications.

Gulyaev S.A. , Bakulina O.D. , Poryvaev A.S. , Yazikova A.A. , Smirnova K.A. , Prikhod’ko S.A. , Sagdeev R.Z. , Adonin N.Y. , Fedin M.V.
Stability of Porous Liquids Based on ZIF-8 Framework and Ionic Liquid/Water Mixtures: a Spin-Probe EPR Study
Journal of Molecular Liquids. 2025. V.438. NPart A. 128640 :1-8. DOI: 10.1016/j.molliq.2025.128640 OpenAlex

Поступила в редакцию:	5 авг. 2025 г.
Принята к публикации:	30 сент. 2025 г.
Опубликована online:	11 окт. 2025 г.
Опубликована в печати:	15 нояб. 2025 г.

OpenAlex:

W4415078473

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