Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis
By spectrophotometric and kinetic methods of analysis a study has been made of adsorption of three antidotes of the phenothiazine series on the surface of fumed silica from water solutions. Physical and chemical parameters of adsorption have been calculated. Thermal decomposition of bulk antidotes h...
Saved in:
| Published in: | Поверхность |
|---|---|
| Date: | 2002 |
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут хімії поверхні ім. О.О. Чуйка НАН України
2002
|
| Subjects: | |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/126351 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis / T.V. Kulik, N.P. Galagan, V.A. Pokrovskiy, V.V. Khrapak // Поверхность. — 2002. — Вип. 7-8. — С. 46-56. — Бібліогр.: 8 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862582834704678912 |
|---|---|
| author | Kulik, T.V. Galagan, N.P. Pokrovskiy, V.A. Khrapak, V.V. |
| author_facet | Kulik, T.V. Galagan, N.P. Pokrovskiy, V.A. Khrapak, V.V. |
| citation_txt | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis / T.V. Kulik, N.P. Galagan, V.A. Pokrovskiy, V.V. Khrapak // Поверхность. — 2002. — Вип. 7-8. — С. 46-56. — Бібліогр.: 8 назв. — англ. |
| collection | DSpace DC |
| container_title | Поверхность |
| description | By spectrophotometric and kinetic methods of analysis a study has been made of adsorption of three antidotes of the phenothiazine series on the surface of fumed silica from water solutions. Physical and chemical parameters of adsorption have been calculated. Thermal decomposition of bulk antidotes has been investigated by the temperatureprogrammed desorption technique with the mass-spectrometric registration of volatile constituents (TPD MS) and the results achieved were compared with data for adsorbed samples. For all the samples at the first stage the maximum of HCl evolution is observed at 180°C. For methylene blue and toluidinee dark blue the first stage is accompanied by evolution of CH3Cl (m/z 50). Then the decomposition proceeds through the rupture of thiazine rings. At this stage, at the temperature of maximum 240°C and higher in mass spectra there appear lines at m/z 93, 66, 51 corresponding to molecular decomposition of aniline. Besides, sulfur-containing fragments originating from rupture of thiazine rings (lines at m/z 32, 34, 107, 121, 135) are observed among the lines attributed to products of thermal decomposition of methylene blue and toluidinee dark blue at high temperatures. Comparison of TPD MS experimental data about thermal decomposition of the antidotes in the condensed and adsorbed states has shown that adsorption on highly dispersed silica surface changed dramatically the mechanism of thermal transformations and increased thermal stability of antidote molecules in comparison to that in the condensed state.
|
| first_indexed | 2025-11-26T23:39:14Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-126351 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | XXXX-0106 |
| language | English |
| last_indexed | 2025-11-26T23:39:14Z |
| publishDate | 2002 |
| publisher | Інститут хімії поверхні ім. О.О. Чуйка НАН України |
| record_format | dspace |
| spelling | Kulik, T.V. Galagan, N.P. Pokrovskiy, V.A. Khrapak, V.V. 2017-11-20T18:25:35Z 2017-11-20T18:25:35Z 2002 Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis / T.V. Kulik, N.P. Galagan, V.A. Pokrovskiy, V.V. Khrapak // Поверхность. — 2002. — Вип. 7-8. — С. 46-56. — Бібліогр.: 8 назв. — англ. XXXX-0106 https://nasplib.isofts.kiev.ua/handle/123456789/126351 By spectrophotometric and kinetic methods of analysis a study has been made of adsorption of three antidotes of the phenothiazine series on the surface of fumed silica from water solutions. Physical and chemical parameters of adsorption have been calculated. Thermal decomposition of bulk antidotes has been investigated by the temperatureprogrammed desorption technique with the mass-spectrometric registration of volatile constituents (TPD MS) and the results achieved were compared with data for adsorbed samples. For all the samples at the first stage the maximum of HCl evolution is observed at 180°C. For methylene blue and toluidinee dark blue the first stage is accompanied by evolution of CH3Cl (m/z 50). Then the decomposition proceeds through the rupture of thiazine rings. At this stage, at the temperature of maximum 240°C and higher in mass spectra there appear lines at m/z 93, 66, 51 corresponding to molecular decomposition of aniline. Besides, sulfur-containing fragments originating from rupture of thiazine rings (lines at m/z 32, 34, 107, 121, 135) are observed among the lines attributed to products of thermal decomposition of methylene blue and toluidinee dark blue at high temperatures. Comparison of TPD MS experimental data about thermal decomposition of the antidotes in the condensed and adsorbed states has shown that adsorption on highly dispersed silica surface changed dramatically the mechanism of thermal transformations and increased thermal stability of antidote molecules in comparison to that in the condensed state. en Інститут хімії поверхні ім. О.О. Чуйка НАН України Поверхность Surface chemistry of silica and related sorbents Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis Article published earlier |
| spellingShingle | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis Kulik, T.V. Galagan, N.P. Pokrovskiy, V.A. Khrapak, V.V. Surface chemistry of silica and related sorbents |
| title | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis |
| title_full | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis |
| title_fullStr | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis |
| title_full_unstemmed | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis |
| title_short | Studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis |
| title_sort | studies of adsorbed phenothiazine antidotes by temperature-programmed desorption with mass-spectrometric analysis |
| topic | Surface chemistry of silica and related sorbents |
| topic_facet | Surface chemistry of silica and related sorbents |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/126351 |
| work_keys_str_mv | AT kuliktv studiesofadsorbedphenothiazineantidotesbytemperatureprogrammeddesorptionwithmassspectrometricanalysis AT galagannp studiesofadsorbedphenothiazineantidotesbytemperatureprogrammeddesorptionwithmassspectrometricanalysis AT pokrovskiyva studiesofadsorbedphenothiazineantidotesbytemperatureprogrammeddesorptionwithmassspectrometricanalysis AT khrapakvv studiesofadsorbedphenothiazineantidotesbytemperatureprogrammeddesorptionwithmassspectrometricanalysis |