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Bromomethane

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Marcin Wilczek – One of the best experts on this subject based on the ideXlab platform.

  • 13c and 1h nuclear magnetic shielding and spin spin coupling constants of 13c enriched Bromomethane in the gas phase
    Chemical Physics Letters, 2007
    Co-Authors: Karol Jackowski, Marek Kubiszewski, Marcin Wilczek

    Abstract:

    Abstract 13 C and 1 H NMR spectral parameters are investigated for 13 CH 3 Br in gaseous matrices. It is found that both the 13 C and 1 H chemical shifts of 13 CH 3 Br are linearly dependent on solvent density. Similar dependence is also detected for one-bond spin–spin coupling, 1 J (CH). For the first time the 13 C and 1 H magnetic shielding constants and 1 J (CH) spin–spin coupling are obtained for an isolated 13 CH 3 Br molecule together with the coefficients responsible for solute–solvent molecular interactions in gaseous matrices. The present experimental results confirm the accuracy of some recent ab initio calculations of nuclear magnetic shielding performed for Bromomethane.

  • 13C and 1H nuclear magnetic shielding and spin–spin coupling constants of 13C-enriched Bromomethane in the gas phase
    Chemical Physics Letters, 2007
    Co-Authors: Karol Jackowski, Marek Kubiszewski, Marcin Wilczek

    Abstract:

    Abstract 13 C and 1 H NMR spectral parameters are investigated for 13 CH 3 Br in gaseous matrices. It is found that both the 13 C and 1 H chemical shifts of 13 CH 3 Br are linearly dependent on solvent density. Similar dependence is also detected for one-bond spin–spin coupling, 1 J (CH). For the first time the 13 C and 1 H magnetic shielding constants and 1 J (CH) spin–spin coupling are obtained for an isolated 13 CH 3 Br molecule together with the coefficients responsible for solute–solvent molecular interactions in gaseous matrices. The present experimental results confirm the accuracy of some recent ab initio calculations of nuclear magnetic shielding performed for Bromomethane.

Wenyue Su – One of the best experts on this subject based on the ideXlab platform.

  • photocatalytic degradation of Bromomethane on sol gel derived so4 2 tio2
    Huan jing ke xue= Huanjing kexue [bian ji Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.], 2001
    Co-Authors: Wenyue Su, X Fu

    Abstract:

    : SO4(2-)/TiO2 photocatalysts were prepared by sol-gel method and characterized by X-ray diffraction (XRD), FTIR spectroscopy and N2 sorption analysis applying BET method. Photocatalytic decomposition of CH3Br in air stream was studied over SO4(2-)/TiO2 photocatalysts under the different reaction conditions. The results showed that the addition of SO4(2-) to TiO2 greatly enhanced its structural and photocatalytic properties. The optimum concentration of SO4(2-) on TiO2 was 9% wt and the best calcination temperature was 450 degrees C. Moreover, the sulfated TiO2(SO4(2-)/TiO2) exhibited excellent stability of activity under the moist reaction condition. When the reaction temperature was below 85 degrees C, the reactivity of Bromomethane was enhanced with increasing reaction temperatures, and the apparent Arrehenius activation energy was 19.6 kJ.mol-1. In the reaction temperature range of 85 degrees C-105 degrees C, the apparent Arrehenius activation energy was zero.

  • Photocatalytic degradation of Bromomethane on sol-gel-derived SO4(2-)/TiO2
    Huan jing ke xue= Huanjing kexue, 2001
    Co-Authors: Wenyue Su, Fu X, Wei K

    Abstract:

    SO4(2-)/TiO2 photocatalysts were prepared by sol-gel method and characterized by X-ray diffraction (XRD), FTIR spectroscopy and N2 sorption analysis applying BET method. Photocatalytic decomposition of CH3Br in air stream was studied over SO4(2-)/TiO2 photocatalysts under the different reaction conditions. The results showed that the addition of SO4(2-) to TiO2 greatly enhanced its structural and photocatalytic properties. The optimum concentration of SO4(2-) on TiO2 was 9% wt and the best calcination temperature was 450 degrees C. Moreover, the sulfated TiO2(SO4(2-)/TiO2) exhibited excellent stability of activity under the moist reaction condition. When the reaction temperature was below 85 degrees C, the reactivity of Bromomethane was enhanced with increasing reaction temperatures, and the apparent Arrehenius activation energy was 19.6 kJ.mol-1. In the reaction temperature range of 85 degrees C-105 degrees C, the apparent Arrehenius activation energy was zero.

Karol Jackowski – One of the best experts on this subject based on the ideXlab platform.

  • 13c and 1h nuclear magnetic shielding and spin spin coupling constants of 13c enriched Bromomethane in the gas phase
    Chemical Physics Letters, 2007
    Co-Authors: Karol Jackowski, Marek Kubiszewski, Marcin Wilczek

    Abstract:

    Abstract 13 C and 1 H NMR spectral parameters are investigated for 13 CH 3 Br in gaseous matrices. It is found that both the 13 C and 1 H chemical shifts of 13 CH 3 Br are linearly dependent on solvent density. Similar dependence is also detected for one-bond spin–spin coupling, 1 J (CH). For the first time the 13 C and 1 H magnetic shielding constants and 1 J (CH) spin–spin coupling are obtained for an isolated 13 CH 3 Br molecule together with the coefficients responsible for solute–solvent molecular interactions in gaseous matrices. The present experimental results confirm the accuracy of some recent ab initio calculations of nuclear magnetic shielding performed for Bromomethane.

  • 13C and 1H nuclear magnetic shielding and spin–spin coupling constants of 13C-enriched Bromomethane in the gas phase
    Chemical Physics Letters, 2007
    Co-Authors: Karol Jackowski, Marek Kubiszewski, Marcin Wilczek

    Abstract:

    Abstract 13 C and 1 H NMR spectral parameters are investigated for 13 CH 3 Br in gaseous matrices. It is found that both the 13 C and 1 H chemical shifts of 13 CH 3 Br are linearly dependent on solvent density. Similar dependence is also detected for one-bond spin–spin coupling, 1 J (CH). For the first time the 13 C and 1 H magnetic shielding constants and 1 J (CH) spin–spin coupling are obtained for an isolated 13 CH 3 Br molecule together with the coefficients responsible for solute–solvent molecular interactions in gaseous matrices. The present experimental results confirm the accuracy of some recent ab initio calculations of nuclear magnetic shielding performed for Bromomethane.