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Volumn 126, Issue 39, 2004, Pages 12541-12550

Molecular understanding of the formation of surface zirconium hydrides upon thermal treatment under hydrogen of [(≡SiO)Zr(CH2tBu) 3] by using advanced solid-state NMR techniques

Author keywords

[No Author keywords available]

Indexed keywords

CARBON; CHEMICAL BONDS; COMPLEXATION; HYDROGEN; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; SILICON COMPOUNDS; SURFACE PHENOMENA; ZIRCONIUM COMPOUNDS;

EID: 4644306523     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja038486h     Document Type: Article
Times cited : (124)

References (80)
  • 34
    • 4644363892 scopus 로고    scopus 로고
    • note
    • 2O, which is consistent with their assignment to (Si-R) species.
  • 48
    • 0001816089 scopus 로고
    • Kintzinger, J. P., Marsmann, H., Eds.; Springer-Verlag: New York
    • Marsmann, H. In NMR, Basic Principles and Progress; Kintzinger, J. P., Marsmann, H., Eds.; Springer-Verlag: New York, 1981; Vol. 17, p 65.
    • (1981) NMR, Basic Principles and Progress , vol.17 , pp. 65
    • Marsmann, H.1
  • 49
    • 4644270473 scopus 로고    scopus 로고
    • note
    • 29Si solid-state NMR spectra has been of some difficulty for such type of material because the concentration is really low (10-50 mmol/g of sample), thus leading to a poor signal-to-noise ratio despite long experimental time (2 days and 6 days for the 1D and the 2D experiments, respectively).
  • 59
    • 4644363826 scopus 로고    scopus 로고
    • note
    • 2Zr=O]" (not identified) and formaldehyde as observed for similar molecular complexes (see refs 52 and 53). Formaldehyde can then react with an adjacent hydride to generate the methoxy zirconium surface complex.
  • 67
    • 4644364972 scopus 로고    scopus 로고
    • note
    • After a treatment at 500 °C for 12 h under vacuum, there is only 30% of (Zr-OH) left, and the major components are (Si-OH) on the surface. Note that during this process some (Si-H) fragments are consumed, probably via reaction with the water produced during the condensation process (dehydroxylation).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.