Neutral and ionic Co(II) Metal-Organic Frameworks with 2-Methylimidazole and Trimesate: Design and Evaluation for Molecule Encapsulation and Slow Release

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-01-09 DOI:10.1039/d4dt02679a

JOSE DE JESUS VELAZQUEZ GARCIA, Luis de los Santos Valladares, Crispin Barnes, Sandra König, Michael Fröba, Volodymyr Baran, Bassima Knjo, Faegheh Khademhir, Aliyenur Ekineken, Fabienne Hain, Evke Carstens, Tom Spillner, Lina Maria Asprilla Herrera, Weronika Łukaszczyk, Simone Techert

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引用次数: 0

Abstract

Two Co(II) mixed-ligand metal-organic frameworks (MOFs) based on 2-methylimidazole and trimesate were synthesised at room temperature. The structure and properties of the two MOFs, named mDESY-1 and mDESY-2, were verified by single crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD), SQUID magnetic susceptibility and N2 adsorption. The structural analysis indicates that mDESY-1 is a 3-D ionic framework with 2-methyl-1H-imidazol-3-ium counterions residing in its pores, while mDESY- 2 is a 2D neutral framework isostructural to ITH-1, with water as co-crystallising solvent. PXRD data demonstrated that mDESY-1 exhibit better crystallinity than mDESY-2. Magnetic measurements indicate that both MOFs are paramagnetic with a weak ferromagnetic transition above room temperature. Although both structures suggest the presence of voids, N2 adsorption data confirmed that these voids are not accessible in either MOF. Nevertheless, mDESY-1 was capable of encapsulating azobenzene during synthesis, which can be observed via SCXRD. The encapsulated molecules were then slowly released in ethanol, with a release of up-to 30mg of azobenzene per g of MOF in a period of 60 days.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.