The key role of K+ counterions in determining the high CO2 capacity of UTSA-16 has been highlighted thanks to a combined use of in situ infrared and 13C solid-state NMR spectroscopies performed in a controlled atmosphere at variable temperature and pressure. A second family of sites, engaged at higher temperature or at higher coverage, was identified in the organic linker. Variable temperature IR measurements of molecular hydrogen at 15 K allowed to further distinguish the K+ sites in two families, slightly different in their polarizing ability and indistinguishable on the basis of CO2 isosteric heat and by using a less sensitive probe than H2, as CO and N2.

CO2 Adsorption Sites in UTSA-16: Multitechnique Approach

MASALA, ALESSIO;GRIFASI, FRANCESCA;ATZORI, CESARE;VITILLO, Jenny Grazia;MINO, LORENZO;BONINO, Francesca Carla;CHIEROTTI, Michele Remo;BORDIGA, Silvia
2016

Abstract

The key role of K+ counterions in determining the high CO2 capacity of UTSA-16 has been highlighted thanks to a combined use of in situ infrared and 13C solid-state NMR spectroscopies performed in a controlled atmosphere at variable temperature and pressure. A second family of sites, engaged at higher temperature or at higher coverage, was identified in the organic linker. Variable temperature IR measurements of molecular hydrogen at 15 K allowed to further distinguish the K+ sites in two families, slightly different in their polarizing ability and indistinguishable on the basis of CO2 isosteric heat and by using a less sensitive probe than H2, as CO and N2.
120
22
12068
12074
http://pubs.acs.org/journal/jpccck
Physical and Theoretical Chemistry; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Energy (all)
Masala, Alessio; Grifasi, Francesca; Atzori, Cesare; Vitillo, Jenny G.; Mino, Lorenzo; Bonino, Francesca; Chierotti, Michele R.; Bordiga, Silvia
File in questo prodotto:
File Dimensione Formato  
masala_JPCC_2016.pdf

Accesso aperto

Descrizione: articolo principale
Tipo di file: PDF EDITORIALE
Dimensione 1.8 MB
Formato Adobe PDF
1.8 MB Adobe PDF Visualizza/Apri
masala_JPCC_ESI_2016.pdf

Accesso aperto

Descrizione: Supporting Information
Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 508.38 kB
Formato Adobe PDF
508.38 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1601105
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 19
social impact