| Yazarlar (15) |
Carmen Rizzuto
|
|
Francesca Nardelli
|
|
Marcello Monteleone
|
|
Lucia Calucci
|
|
C. Grazia Bezzu
|
|
Mariolino Carta
|
|
Elena Tocci
|
|
Elisa Esposito
|
|
Giorgio De Luca
|
|
Bibiana Comesana-Gandara
|
|
Neil B. Mckeown
|
Doç. Dr. Bekir SAYGINER
Kırşehir Ahi Evran Üniversitesi, Türkiye |
|
Peter M. Budd
|
|
Johannes C. Jansen
|
|
Alessio Fuoco
|
| Özet |
| Previously, it has been reported that amine-PIM-1, a polymer of intrinsic microporosity obtained by reduction of nitrile groups of PIM-1 to primary amine groups, shows enhanced CO 2 selectivity during mixed gas permeation studies with respect to single gas measurements for gas pairs involving CO 2. This distinct and potentially useful behaviour was ascribed to the affinity of CO 2 for the polymer amine groups. Here, we demonstrate that enhanced selectivity originates from both CO 2 physisorption and chemisorption. A combination of 13 C and 15 N solid-state NMR spectroscopic analyses of a CO 2-loaded amine-PIM-1 membrane allowed the identification and quantitative determination of both chemisorbed and physisorbed species and the characterization of polymer-CO 2 interactions. Experiments with 13 C isotopically enriched CO 2 unequivocally demonstrated the conversion of 20% of the NH2 groups into carbamic acids at 298 K and a CO 2 pressure of 1 bar. Chemisorption was supported by the strong heat of CO 2 adsorption for amine-PIM-1 that was estimated as 50 kJ mol-1. Molecular Dynamics simulations with models based on the experimentally determined polymer structure gave a detailed description of intra-and interchain hydrogen bond interactions in amine-PIM-1 after chemisorption, as well as of the effect of chemisorption on polymer porosity and physisorption. |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale |
| Dergi Adı | JOURNAL OF MATERIALS CHEMISTRY A |
| Dergi ISSN | 2050-7488 Wos Dergi Scopus Dergi |
| Dergi Tarandığı Indeksler | SCI |
| Dergi Grubu | Q1 |
| Makale Dili | Türkçe |
| Basım Tarihi | 01-2025 |
| Cilt No | 13 |
| Sayı | 23 |
| Sayfalar | 12 / 17876 |
| Doi Numarası | 10.1039/d4ta08839e |
| Makale Linki | https://doi.org/10.1039/d4ta08839e |
| Atıf Sayıları | |
| WoS | 2 |
| Google Scholar | 4 |
