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Goodenough I, Boyanich MC, McDonnell RP, Castellana L, Datta Devulapalli VS, Luo TY, Das P, Richard M, Rosi NL, Borguet E. Reversible solvent interactions with UiO-67 metal-organic frameworks. J Chem Phys 2024; 160:044711. [PMID: 38294314 DOI: 10.1063/5.0180924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/06/2023] [Indexed: 02/01/2024] Open
Abstract
The utility of UiO-67 Metal-Organic Frameworks (MOFs) for practical applications requires a comprehensive understanding of intermolecular host-guest MOF-analyte interactions. To investigate intermolecular interactions between UiO-67 MOFs and complex molecules, it is useful to evaluate the interactions with simple polar and non-polar analytes. This problem is approached by investigating the interactions of polar (acetone and isopropanol) and non-polar (n-heptane) molecules with functionalized UiO-67 MOFs via temperature programmed desorption mass spectrometry and temperature programmed Fourier transform infrared spectroscopy. We find that isopropanol, acetone, and n-heptane bind reversibly and non-destructively to UiO-67 MOFs, where MOF and analyte functionality influence relative binding strengths (n-heptane ≈ isopropanol > acetone). During heating, all three analytes diffuse into the internal pore environment and directly interact with the μ3-OH groups located within the tetrahedral pores, evidenced by the IR response of ν(μ3-OH). We observe nonlinear changes in the infrared cross sections of the ν(CH) modes of acetone, isopropanol, and n-heptane following diffusion into UiO-67. Similarly, acetone's ν(C=O) infrared cross section increases dramatically when diffused into UiO-67. Ultimately, this in situ investigation provides insights into how individual molecular functional groups interact with UiO MOFs and enables a foundation where MOF interactions with complex molecular systems can be evaluated.
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Affiliation(s)
- Isabella Goodenough
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Mikaela C Boyanich
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Ryan P McDonnell
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Lauren Castellana
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | | | - Tian-Yi Luo
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
| | - Prasenjit Das
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
| | - Mélissandre Richard
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Nathaniel L Rosi
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
| | - Eric Borguet
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
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Tsigoias S, Kouderis C, Mylona-Kosmas A, Kalampounias AG. Intermolecular Hydrogen Bonding in Associated Fluids: The Case of Isopentyl Alcohol Dissolved in Carbon Tetrachloride. Molecules 2023; 28:6285. [PMID: 37687113 PMCID: PMC10488694 DOI: 10.3390/molecules28176285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/25/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
Fourier-transform infrared (FTIR) spectra of isopentyl-alcohol dissolved in carbon tetrachloride (CCl4) were recorded as a function of concentration and temperature. Dilute isopentyl alcohol/CCl4 solutions were prepared in alcohol at concentrations of 1, 0.5, 0.3, 0.2, 0.1, 0.05, 0.02, 0.01, 0.005, 0.001 and 0.0005 M. Infrared absorption measurements were taken within a temperature range of 17-67 °C below the boiling point of the solutions. Decomposition of the spectral features corresponding to associated and unassociated species was performed to quantitatively follow the effect of temperature and concentration on intermolecular hydrogen bonding (HB) in isopentyl alcohol. The spectral feature in the 3600-3650 cm-1 frequency range attributed to the free OH stretching band was studied in detail to determine changes based on concentration and temperature variations. Computational methodologies were applied to evaluate the energetics and vibrational properties of the species involved in the structure in the gaseous state where no interactions are present. The results are discussed in view of relevant structural models to gain quantitative information concerning the effect of concentration and temperature on intermolecular hydrogen bonding.
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Affiliation(s)
- Stefanos Tsigoias
- Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
| | | | - Agni Mylona-Kosmas
- Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
| | - Angelos G. Kalampounias
- Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
- Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), GR-45110 Ioannina, Greece
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