| Autor: |
Woschko, Dennis, Yilmaz, Süheyla, Jansen, Christian, Spieß, Alex, Oestreich, Robert, Matemb Ma Ntep, Tobie J., Janiak, Christoph |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 1/28/2023, Vol. 52 Issue 4, p977-989, 13p |
| Abstrakt: |
Single crystals of the new metal–organic framework (MOF) In-adc (HHUD-4) were obtained through the reaction of linear acetylenedicarboxylic acid (H2adc) with In(NO3)3·xH2O as a racemic conglomerate in the chiral tetragonal space groups P4322 and P4122. Fundamentally different from other MOFs with linear linkers and trans-μ-OH-connected infinite {MO6} secondary building units as in the MIL-53-type, the linear adc2− linker leads to the formation of cis-μ-OH connected {InO6} polyhedra, which have otherwise only been found before for V-shaped ligands, as in CAU-10-H. A far-reaching implication of this finding is the possibility that trans-μ-OH/straight MIL-53-type MOFs will have polymorphs of CAU-10-H cis-μ-OH/helical topology and vice versa. HHUD-4 is a microporous MOF with a BET surface area of up to 940 m2 g−1 and a micropore volume of up to 0.39 cm3 g−1. Additionally, HHUD-4 features good adsorption uptakes of 3.77 mmol g−1 for CO2 and 1.25 mmol g−1 for CH4 at 273 K and 1 bar, respectively, and a high isosteric heat of adsorption of 11.4 kJ mol−1 for H2 with a maximum uptake of 6.36 mmol g−1 at 77 K and 1 bar. Vapor sorption experiments for water and volatile organic compounds (VOCs) such as benzene, cyclohexane and n-hexane yielded uptake values of 135, 269, 116 and 205 mg g−1, respectively, at 293 K. While HHUD-4 showed unremarkable results for water uptake and low stability for water, it exhibited good stability with steep VOC uptake steps at low relative pressures and a high selectivity of 17 for benzene/cyclohexane mixtures. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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