Abstract
Two new isostructural microporous coordination frameworks [Mn3(Hpdc)2(pdc)2] (1) and [Mg3(Hpdc)2(pdc)2] (2) (pdc2- = pyridine-2,4-dicarboxylate) showing primitive cubic (pcu) topology have been prepared and characterized. The pore aperture of the channels is too narrow for the efficient adsorption of N2; however, both compounds demonstrate substantially higher uptake of CO2 (119.9 mL·g-1 for 1 and 102.5 mL·g-1 for 2 at 195 K, 1 bar). Despite of their structural similarities, 2 shows a typical reversible type I isotherm for adsorption/desorption of CO2, while 1 features a two-step adsorption process with a very broad hysteresis between the adsorption and desorption curves. This behavior can be explained by a combination of density functional theory calculations, sorption, and X-ray diffraction analysis and gives insights into the further development of new sorbents showing adsorption/desorption hysteresis.
Original language | English (US) |
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Pages (from-to) | 6811-6820 |
Number of pages | 10 |
Journal | Inorganic chemistry |
Volume | 58 |
Issue number | 10 |
DOIs | |
State | Published - May 20 2019 |
Bibliographical note
Funding Information:The reported study was funded by RFBR according to Research Project No. 18-29-04001. R.V.B. is grateful to the crew of Center for Computational Materials Science and E-IMR Center at the Institute for Materials Research, Tohoku University, for continuous support and also is thankful to the Ministry of Education, Culture, Sports, Science, and Technology of Japan (Grant No. 17H03122) for financial support. EPR studies were supported by FASO (0333-2017-0002). A.M.S. acknowledges RF President’s Grant MK-3272.2017.3 and FASO (0333-2017-0002). M.S. acknowledges support from the ERC (AdG 742041).
Publisher Copyright:
© 2019 American Chemical Society.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry