Adsorption Complexes of Cr(Acac)<sub>3</sub> on Fumed SiO<sub>2</sub> Surface upon Vapour-Phase Modification

Authors

  • L. O. Davydenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • A. G. Grebenyuk Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • Yu. V. Plyuto Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine

Keywords:

Cr(acac)3, fumed silica, vapour-phase modification, adsorption complex

Abstract

The modifying mechanism fumed SiO2 particles of 12 nm size with Cr(acac)3 vapour at 463 K in argon flow has been studied. Adsorption of Cr(acac)3 on SiO2 surface has been found out to occur due to hydrogen bonding of oxygen atoms of acetylacetonate ligands of Сr(acac)3 with hydrogen atoms of hydroxyl groups of SiO2 surface that preceded ligand substitution above 500 K and SiО–Cr bond formation. Hydrogen bonding has been proved with 2–8 nm high-wavelength shift of ???, d?? and d?d transition bands in UV-vis spectrum and 4 cm-1 low-wavenumber shift of ?s (C- C- O) vibration band in IR spectrum of Cr(acac)3 resulted from its adsorption at SiO2surface.

References

1. Kenvin J.C., White M.G., Mitchell M.B. Preparation and characterization of supported mononuclear metal complexes as model catalysts // Langmuir. – 1991. – V. 7. – P. 1198–1205.

2. Haukka S., Lakomaa E.-L., Suntola T. Chemisorption of chromium acetylacetonate on porous high surface area silica // Appl. Surf. Sci. – 1994. – V. 75. – P. 220–227.

3. Köhler S., Reiche M., Frobel C., Baerns M. Preparation of catalysts by chemical vapor-phase deposition and decomposition on support materials in a fluidized-bed reactor // Stud. Surf. Sci. Catal. – 1995. – V. 91. – P. 1009–1016.

4. Babich I.V., Plyuto Yu.V., Van der Voort P., Vansant E.F. Thermal transformations of chromium acetylacetonate on silica surface // J. Colloid Interf. Sci. – 1997. – V. 189. – P. 144–150.

5. Hakuli A., Kytökivi A. Binding of chromium acetylacetonate on a silica support // Phys. Chem. Chem. Phys. – 1999. – V. 1. – P. 1607–1613.

6. Schmidt M.W., Baldridge K.K., Boatz J.A. et al. General atomic and molecular electronic – structure system: Review // J. Comput. Chem. – 1993. – V. 14. – P. 1347–1363.

7. Давиденко Л.О., Гребенюк А.Г., Плюто Ю.В. Стан ацетилацетонату хрому на поверхні пірогенного кремнезему // Зб. Хімія, фізика і технологія поверхні. – 2004. – Вип. 10. –    С. 40–45.

8. Устинов А.Ю., Устинова О.М., Вовна В.И., Казачек M.В. Электронные спектры поглощения и электронная структура     трис-β-дикетонатов хрома // Журн. коорд. химии. – 1994. – Т. 20. – С. 600–603.

9. Dunken H.H., Lygin V.I. Quantenchemie der Adsorption an Festkörper-berflachen. – Leipzig:VEB Deutscher Verlag für Grundstoffindustrie, 1978. – 288 s.

10. George W.O. The infrared spectra of chromium (III) acetylacetonate and chro-mium (III) malondialdehyde // Spectrochim. Acta. – 1971. – V. 27A. – P. 265–269.

11. Nakamoto K. Infrared and Raman spectra of inorganic and coordination compounds. – New York: Wiley-Interscience, 1986. – 484 р.

12. White R.L., Nair A. Diffuse reflectance infrared spectroscopic characterization of silica dehydroxylation // Appl. Spect. – 1990. – V. 44. – P. 69–75.

13. Burneau A., Barrès O., Gallas J.P., Lavalley J.C. Comparative study of the surface hydroxyl groups of fumed and precipitated silicas. 2. Characterization by infrared spectroscopy of the interactions with water // Langmuir. – 1990. – V. 6. – P. 1364–1372.

14. Davis K.M., Tomozawa M. An infrared spectroscopic study of water-related species in silica glasses // J. Non-Cryst. Solid. – 1996. – V. 201. – P. 177–198.

15. Marcolli C., Laine Ph., Bu1hler R. et al. Vibrations of H8Si8O12, D8Si8O12, and H10Si10O15 as determined by INS, IR, and Raman experiments // J. Phys. Chem. B. – 1997. – V. 101. – P. 1171–1179.

16. Radtsig V.A. Overton-region IR registration of (≡Si–O)2Si=O and (≡Si–O)2Si<O2>C=O groups on the silica surface // Kinet. Catal. – 2001. – V. 42. – Р. 46–54.

17. Morrow B.A., McFarlan A.J. Surface vibrational modes of silanol groups on silica // J. Phys. Chem. – 1992. – V. 96. – P. 1395–1400.

Downloads

How to Cite

DAVYDENKO, L. O.; GREBENYUK, A. G.; PLYUTO, Yu. V. Adsorption Complexes of Cr(Acac)<sub>3</sub> on Fumed SiO<sub>2</sub> Surface upon Vapour-Phase Modification. Chemistry, Physics and Technology of Surface, [S. l.], v. 4, n. 3, p. 250–259, 2013. Disponível em: https://cpts.com.ua/index.php/cpts/article/view/229. Acesso em: 14 jul. 2025.

Issue

Vol. 4 No. 3 (2013): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

Section

Articles

License

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.