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| Pàgina inicial > Articles > Articles publicats > Modulation of the Dynamics of a Two-Dimensional Interweaving Metal-Organic Framework through Induced Hydrogen Bonding |
| Data: | 2024 |
| Resum: | Inducing, understanding, and controlling the flexibility in metal-organic frameworks (MOFs) are of utmost interest due to the potential applications of dynamic materials in gas-related technologies. Herein, we report the synthesis of two isostructural two-dimensional (2D) interweaving zinc(II) MOFs, TMU-27 [Zn(bpipa)(bdc)] and TMU-27-NH [Zn(bpipa)(NH-bdc)], based on N,N'-bis-4-pyridyl-isophthalamide (bpipa) and 1,4-benzenedicarboxylate (bdc) or 2-amino-1,4-benzenedicarboxylate (NH-bdc), respectively. These frameworks differ only by the substitution at the meta-position of their respective bdc groups: an H atom in TMU-27 vs an NH group in TMU-27-NH. This difference strongly influences their respective responses to external stimuli, since we observed that the structure of TMU-27 changed due to desolvation and adsorption, whereas TMU-27-NH remained rigid. Using single-crystal X-ray diffraction and CO-sorption measurements, we discovered that upon CO sorption, TMU-27 undergoes a transition from a closed-pore phase to an open-pore phase. In contrast, we attributed the rigidification in TMU-27-NH to intermolecular hydrogen bonding between interweaving layers, namely, between the H atoms from the bdc-amino groups and the O atoms from the bpipa-amide groups within these layers. Additionally, by using scanning electron microscopy to monitor the CO adsorption and desorption in TMU-27, we were able to establish a correlation between the crystal size of this MOF and its transformation pressure. |
| Ajuts: | European Commission 101019003 Agencia Estatal de Investigación PID2021-124804NB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00458 Agencia Estatal de Investigación CEX2021-001214-S |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Benzenedicarboxylate ; Dynamic materials ; External stimulus ; Isostructural ; Meta positions ; Metalorganic frameworks (MOFs) ; Pore phase ; Pyridyl ; Two-dimensional ; Zinc metal |
| Publicat a: | Inorganic chemistry, Vol. 63, Issue 12 (March 2024) , p. 5552-5558, ISSN 1520-510X |
7 p, 4.4 MB |