Dynamics and Ferroelectric Order in Pyridinium Salts, and Host-guest Interaction of Benzene on Faujasite
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Lieferung aus: Frankreich, Expédition sous 1 à 2 jours ouvrés.
Von Händler/Antiquariat, Logos Verlag Berlin.
Muon spin resonance ($mu$SR) and deuteron nuclear magnetic resonance ($^2$H NMR) were used to investigate the cation dynamics in pyridinium tetrafluoroborate ([C$_5$H$_5$NH]$^+$[BF$_4$]$^-$). Compared to the macroscopic data the results show the individual ionic contribution permitting the interpretation of the intermolecular interaction which leads to ferroelectricity. Additional $mu$SR measurements were performed on pyridinium perchlorate ([C$_5$H$_5$NH]$^+$[ClO$_4$]$^-$) as the perchlorate shows a ferroelectric solid-solid phase transition of first order. This is in contrast to the tetrafluoroborate which shows a second order transition. The selectivity and efficiency of catalytic reactions in zeolites are mostly determined by the dynamics of the guest molecules because the latter is not only responsible for the mobility of the guest molecules within the lattice itself but also for the translational mobility to the active centers. In faujasites of type NaX and NaY the sodium ions were partly exchanged by metal ions (Pt$^2^+$, Pd$^2^+$, Ag$^+$, Ni$^2^+$, Zn$^2^+$, Mn$^2^+$) in an aequous ion exchange procedure, and the zeolite was loaded with benzene. Compared to the $mu$SR spectra of pure benzene the spectra of the metal exchanged zeolites show shifts of the resonance positions. Broché, Label: Logos Verlag Berlin GmbH, Logos Verlag Berlin GmbH, Produktgruppe: Book, Publiziert: 2003-08-15, Studio: Logos Verlag Berlin GmbH.

Lieferung aus: Vereinigte Staaten von Amerika, Usually ships in 1-2 business days.
Von Händler/Antiquariat, Logos Verlag Berlin GmbH.
Muon spin resonance ($mu$SR) and deuteron nuclear magnetic resonance ($^2$H NMR) were used to investigate the cation dynamics in pyridinium tetrafluoroborate ([C$_5$H$_5$NH]$^+$[BF$_4$]$^-$). Compared to the macroscopic data the results show the individual ionic contribution permitting the interpretation of the intermolecular interaction which leads to ferroelectricity. Additional $mu$SR measurements were performed on pyridinium perchlorate ([C$_5$H$_5$NH]$^+$[ClO$_4$]$^-$) as the perchlorate shows a ferroelectric solid-solid phase transition of first order. This is in contrast to the tetrafluoroborate which shows a second order transition. The selectivity and efficiency of catalytic reactions in zeolites are mostly determined by the dynamics of the guest molecules because the latter is not only responsible for the mobility of the guest molecules within the lattice itself but also for the translational mobility to the active centers. In faujasites of type NaX and NaY the sodium ions were partly exchanged by metal ions (Pt$^2^+$, Pd$^2^+$, Ag$^+$, Ni$^2^+$, Zn$^2^+$, Mn$^2^+$) in an aequous ion exchange procedure, and the zeolite was loaded with benzene. Compared to the $mu$SR spectra of pure benzene the spectra of the metal exchanged zeolites show shifts of the resonance positions. Paperback, Label: Logos Verlag, Logos Verlag, Produktgruppe: Book, Publiziert: 2003-08-15, Studio: Logos Verlag.

Lieferung aus: Vereinigte Staaten von Amerika, Usually ships in 1-2 business days.
Von Händler/Antiquariat, Berlin Express.
Muon spin resonance ($mu$SR) and deuteron nuclear magnetic resonance ($^2$H NMR) were used to investigate the cation dynamics in pyridinium tetrafluoroborate ([C$_5$H$_5$NH]$^+$[BF$_4$]$^-$). Compared to the macroscopic data the results show the individual ionic contribution permitting the interpretation of the intermolecular interaction which leads to ferroelectricity. Additional $mu$SR measurements were performed on pyridinium perchlorate ([C$_5$H$_5$NH]$^+$[ClO$_4$]$^-$) as the perchlorate shows a ferroelectric solid-solid phase transition of first order. This is in contrast to the tetrafluoroborate which shows a second order transition. The selectivity and efficiency of catalytic reactions in zeolites are mostly determined by the dynamics of the guest molecules because the latter is not only responsible for the mobility of the guest molecules within the lattice itself but also for the translational mobility to the active centers. In faujasites of type NaX and NaY the sodium ions were partly exchanged by metal ions (Pt$^2^+$, Pd$^2^+$, Ag$^+$, Ni$^2^+$, Zn$^2^+$, Mn$^2^+$) in an aequous ion exchange procedure, and the zeolite was loaded with benzene. Compared to the $mu$SR spectra of pure benzene the spectra of the metal exchanged zeolites show shifts of the resonance positions. Paperback, Label: Logos Verlag, Logos Verlag, Produktgruppe: Book, Publiziert: 2003-08-15, Studio: Logos Verlag.

Muon spin resonance (SR) and deuteron nuclear magnetic resonance (öH NMR) were used to investigate the cation dynamics in pyridinium tetrafluoroborate ([CöHöNH]öº[BFö']ö»). Compared to the macroscopic data the results show the individual ionic contribution permitting the interpretation of the intermolecular interaction which leads to ferroelectricity. Additional SR measurements were performed on pyridinium perchlorate ([CöHöNH]öº[ClOö']ö») as the perchlorate shows a ferroelectric solid-solid phase transition of first order. This is in contrast to the tetrafluoroborate which shows a second order transition. The selectivity and efficiency of catalytic reactions in zeolites are mostly determined by the dynamics of the guest molecules because the latter is not only responsible for the mobility of the guest molecules within the lattice itself but also for the translational mobility to the active centers. In faujasites of type NaX and NaY the sodium ions were partly exchanged by metal ions (Ptööº, Pdööº, Agöº, Niööº, Znööº, Mnööº) in an aequous ion exchange procedure, and the zeolite was loaded with benzene. Compared to the SR spectra of pure benzene the spectra of the metal exchanged zeolites show shifts of the resonance positions.

Lieferung aus: Deutschland, Gewöhnlich versandfertig in 24 Stunden, Versandkostenfrei. Tatsächliche Versandkosten können abweichen.
Von Händler/Antiquariat, Logos Verlag Berlin.
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Lieferung aus: Vereinigte Staaten von Amerika, Lagernd, zzgl. Versandkosten.
Die Beschreibung dieses Angebotes ist von geringer Qualität oder in einer Fremdsprache. Trotzdem anzeigen

Von Händler/Antiquariat, ISD LLC [57405250], Bristol, CT, U.S.A.
3832502963.

Lieferung aus: Vereinigte Staaten von Amerika, zzgl. Versandkosten, Verandgebiet: DOM.
Von Händler/Antiquariat, ISD, CT, Bristol, [RE:4].
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