FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2022990669> ?p ?o ?g. }

• W2022990669 endingPage "2127" @default.
• W2022990669 startingPage "2120" @default.
• W2022990669 abstract "A study of the nature and accessibility of internal and external protonic and cationic sites has been carried out on protonic and partially Co-exchanged FER, MFI, and MOR through the use of UV−vis and FT-IR spectroscopy. The ion-exchange procedure was exactly the same for the three zeolites. A sample of Co-exchanged silica−alumina has also been investigated for comparison. UV−vis spectra recorded after outgassing at 773 K provide evidence of the presence of low-coordination Co2+ sites in all outgassed Co-containing samples. However, they show that the sites located in the zeolite cavities cannot be distinguished from those located at the open surfaces. FT-IR studies of the adsorption of benzonitrile and o-toluonitrile, used as differently hindered weak basic molecules, allowed us to distinguish sites located at the external surfaces or in different cavities. Benzonitrile enters only the main channels of H−MOR and Co−H−MOR, whereas it is not able to enter the mouths of the side pockets. Benzonitrile also enters the channels of H−MFI and Co−H−MFI. o-Toluonitrile enters the main channels of H−MOR but does not enter the main channels of Co−H−MOR. Similarly, it slowly enters the channels of H−MFI but does not enter those of Co−H−MFI. So, it provides evidence for the narrowing of the pores of MOR and MFI by Co exchange. Both nitriles do not enter at all the channels of H−FER and Co−H−FER but provide evidence for the location of Co ions at the outer surface. In all cases terminal silanols and Lewis sites are located at the external surfaces, whereas the strongly acidic bridging OHs are exclusively located in the interior of the cavities. In Co−H zeolites, Co2+ ions are distributed between internal and external surfaces. The extent of exchange of the internal OHs roughly depends directly on the cavity dimensions, increasing in this sense: FER < MFI < MOR and MOR (side pockets) < MOR (main channels). The data also show that, at least for MFI, cation exchange essentially occurs at the mouth of the channels." @default.
• W2022990669 created "2016-06-24" @default.
• W2022990669 creator A5000034071 @default.
• W2022990669 creator A5017496763 @default.
• W2022990669 creator A5020009712 @default.
• W2022990669 creator A5047120742 @default.
• W2022990669 date "2004-01-22" @default.
• W2022990669 modified "2023-09-26" @default.
• W2022990669 title "UV−Vis and FT-IR Study of the Nature and Location of the Active Sites of Partially Exchanged Co−H Zeolites" @default.
• W2022990669 cites W181464064 @default.
• W2022990669 cites W1975471852 @default.
• W2022990669 cites W1976491917 @default.
• W2022990669 cites W1980787944 @default.
• W2022990669 cites W1981298720 @default.
• W2022990669 cites W1991128239 @default.
• W2022990669 cites W1992594687 @default.
• W2022990669 cites W1999983216 @default.
• W2022990669 cites W2005370065 @default.
• W2022990669 cites W2023285979 @default.
• W2022990669 cites W2023458071 @default.
• W2022990669 cites W2031657402 @default.
• W2022990669 cites W2035065339 @default.
• W2022990669 cites W2036034674 @default.
• W2022990669 cites W2044111971 @default.
• W2022990669 cites W2053208139 @default.
• W2022990669 cites W2062996166 @default.
• W2022990669 cites W2063330173 @default.
• W2022990669 cites W2064227037 @default.
• W2022990669 cites W2079607045 @default.
• W2022990669 cites W2081180389 @default.
• W2022990669 cites W2090188879 @default.
• W2022990669 cites W2107888889 @default.
• W2022990669 cites W2137102956 @default.
• W2022990669 cites W2465609037 @default.
• W2022990669 cites W2624287531 @default.
• W2022990669 doi "https://doi.org/10.1021/jp034814o" @default.
• W2022990669 hasPublicationYear "2004" @default.
• W2022990669 type Work @default.
• W2022990669 sameAs 2022990669 @default.
• W2022990669 citedByCount "48" @default.
• W2022990669 countsByYear W20229906692013 @default.
• W2022990669 countsByYear W20229906692014 @default.
• W2022990669 countsByYear W20229906692015 @default.
• W2022990669 countsByYear W20229906692016 @default.
• W2022990669 countsByYear W20229906692018 @default.
• W2022990669 countsByYear W20229906692019 @default.
• W2022990669 countsByYear W20229906692020 @default.
• W2022990669 countsByYear W20229906692021 @default.
• W2022990669 countsByYear W20229906692022 @default.
• W2022990669 countsByYear W20229906692023 @default.
• W2022990669 crossrefType "journal-article" @default.
• W2022990669 hasAuthorship W2022990669A5000034071 @default.
• W2022990669 hasAuthorship W2022990669A5017496763 @default.
• W2022990669 hasAuthorship W2022990669A5020009712 @default.
• W2022990669 hasAuthorship W2022990669A5047120742 @default.
• W2022990669 hasConcept C117760992 @default.
• W2022990669 hasConcept C145148216 @default.
• W2022990669 hasConcept C147789679 @default.
• W2022990669 hasConcept C150394285 @default.
• W2022990669 hasConcept C153642686 @default.
• W2022990669 hasConcept C155647269 @default.
• W2022990669 hasConcept C161790260 @default.
• W2022990669 hasConcept C178790620 @default.
• W2022990669 hasConcept C183882617 @default.
• W2022990669 hasConcept C185592680 @default.
• W2022990669 hasConcept C2778077586 @default.
• W2022990669 hasConcept C2779953769 @default.
• W2022990669 hasConcept C32909587 @default.
• W2022990669 hasConcept C71240020 @default.
• W2022990669 hasConcept C8010536 @default.
• W2022990669 hasConceptScore W2022990669C117760992 @default.
• W2022990669 hasConceptScore W2022990669C145148216 @default.
• W2022990669 hasConceptScore W2022990669C147789679 @default.
• W2022990669 hasConceptScore W2022990669C150394285 @default.
• W2022990669 hasConceptScore W2022990669C153642686 @default.
• W2022990669 hasConceptScore W2022990669C155647269 @default.
• W2022990669 hasConceptScore W2022990669C161790260 @default.
• W2022990669 hasConceptScore W2022990669C178790620 @default.
• W2022990669 hasConceptScore W2022990669C183882617 @default.
• W2022990669 hasConceptScore W2022990669C185592680 @default.
• W2022990669 hasConceptScore W2022990669C2778077586 @default.
• W2022990669 hasConceptScore W2022990669C2779953769 @default.
• W2022990669 hasConceptScore W2022990669C32909587 @default.
• W2022990669 hasConceptScore W2022990669C71240020 @default.
• W2022990669 hasConceptScore W2022990669C8010536 @default.
• W2022990669 hasIssue "7" @default.
• W2022990669 hasLocation W20229906691 @default.
• W2022990669 hasOpenAccess W2022990669 @default.
• W2022990669 hasPrimaryLocation W20229906691 @default.
• W2022990669 hasRelatedWork W1922598621 @default.
• W2022990669 hasRelatedWork W1987795423 @default.
• W2022990669 hasRelatedWork W1996370580 @default.
• W2022990669 hasRelatedWork W2046365422 @default.
• W2022990669 hasRelatedWork W2110017548 @default.
• W2022990669 hasRelatedWork W2391266886 @default.
• W2022990669 hasRelatedWork W2479222700 @default.
• W2022990669 hasRelatedWork W2483057939 @default.
• W2022990669 hasRelatedWork W2963193959 @default.

• next