Encapsulation of N-containing compounds in a new hydrophilic Cd-based crystalline sponge via coordinative alignment method

Literature Information

Publication Date 2023-08-11
DOI 10.1039/D3CE00592E
Impact Factor 3.545
Authors

Faiza Habib, Derek A. Tocher, Claire J. Carmalt


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Abstract

The crystalline sponge method (CSM) is a technology which allows precise molecular determination of non-crystalline compounds, without the need to crystallise them independently, by soaking them in a crystalline metal–organic framework (MOF). To expand the CSM to a wider range of guest molecules, the development of a new crystalline sponge is essential. In this study a new Cd-based MOF {[Cd7(4,4′4′′-[1,3,5-benzenetriyltris(carbonylimino)]-trisbenzoato)4(μ3-OH)2(H2O)4(DMF)4]·(solvent)x}n was synthesized and investigated as an alternative crystalline sponge (2). Sponge 2 demonstrated versatility in solvent stability compared to the well-studied [{(ZnI2)3(tris(4-pyridyl)-1,3,5-triazine)2·x(CHCl3)}n] (1) and was stable in the presence of polar aprotic, polar protic solvents and Lewis bases. Inclusion complexes with three solvents, acetonitrile, acetone, and isopropanol were prepared. These guest molecules were fixed in the pore via hydrogen bonding confirming the hydrophilic pore environment of sponge 2. Notably, sponge 2 also demonstrated the ability to accommodate N-containing compounds such as pyridine, 3,5-lutidine, and 4-aminopyridine via the coordinative alignment method (CAL). A study was conducted to compare the ability of sponge 2 and related pyridine containing sponge 3 by encapsulating the same pair of guests: N,N-dimethylaniline and propiophenone.

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Source Journal

CrystEngComm

CrystEngComm
CiteScore: 5.5
Self-citation Rate: 7.7%
Articles per Year: 643

CrystEngComm is the forum for the design and understanding of crystalline materials. We welcome studies on the investigation of molecular behaviour within crystals, control of nucleation and crystal growth, engineering of crystal structures, and construction of crystalline materials with tuneable properties and functions. We publish hypothesis-driven research into… how crystal design affects thermodynamics, phase transitional behaviours, polymorphism, morphology control, solid state reactivity (crystal-crystal solution-crystal, and gas-crystal reactions), optoelectronics, ferroelectric materials, non-linear optics, molecular and bulk magnetism, conductivity and quantum computing, catalysis, absorption and desorption, and mechanical properties. Using Techniques and methods including… Single crystal and powder X-ray, electron, and neutron diffraction, solid-state spectroscopy, spectrometry, and microscopy, modelling and data mining, and empirical, semi-empirical and ab-initio theoretical evaluations. On crystalline and solid-state materials. We particularly welcome work on MOFs, coordination polymers, nanocrystals, host-guest and multi-component molecular materials. We also accept work on peptides and liquid crystals. All papers should involve the use or development of a design or optimisation strategy. Routine structural reports or crystal morphology descriptions, even when combined with an analysis of properties or potential applications, are generally considered to be outside the scope of the journal and are unlikely to be accepted.

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