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Volumn 351, Issue 1-2, 2009, Pages 219-229

Hybrid inorganic-organic materials carrying tertiary amine and thiourea residues tethered on mesoporous silica nanoparticles: Synthesis, characterization, and co-operative catalysis

Author keywords

Catalyst recycling; Co operative catalysis; Mesoporous materials; Organic catalysis; Organic inorganic hybrid composites

Indexed keywords


EID: 58549100479     PISSN: 16154150     EISSN: 15213897     Source Type: Journal    
DOI: 10.1002/adsc.200800635     Document Type: Article
Times cited : (46)

References (50)
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    • Reactions in which the silanol residues of the silica surface participate to the catalytic activity of a mono-functional catalyst supported on the same surface are not considered as occurring under co-operative catalysis. For examples, see: a J. D. Bass, A. Soloyvov, A. J. Pascall, A. Katz, J. Am. Chem. Soc. 2006, 128, 3737-3747;
    • Reactions in which the silanol residues of the silica surface participate to the catalytic activity of a mono-functional catalyst supported on the same surface are not considered as occurring under co-operative catalysis. For examples, see: a) J. D. Bass, A. Soloyvov, A. J. Pascall, A. Katz, J. Am. Chem. Soc. 2006, 128, 3737-3747;
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    • By the same token, reactions in which the catalytic activity of a mono-functional supported catalyst is tuned by the presence of a neighboring organic residue affecting the polarity around the catalytic sites but not involved in the catalytic cycle are also not considered examples of co-operative catalysis: e S. Huh, H. T. Chen, J. W. Wiench, M. Pruski, V. S.-Y. Lin, J. Am. Chem. Soc. 2004, 126, 1010-1011.
    • By the same token, reactions in which the catalytic activity of a mono-functional supported catalyst is tuned by the presence of a neighboring organic residue affecting the polarity around the catalytic sites but not involved in the catalytic cycle are also not considered examples of co-operative catalysis: e) S. Huh, H. T. Chen, J. W. Wiench, M. Pruski, V. S.-Y. Lin, J. Am. Chem. Soc. 2004, 126, 1010-1011.
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    • These results together with recent findings in our laboratories indicated that FT-IR could be used as a routine method for the preliminary structural investigation of this type of materials. The use of this technique can be very convenient for checking the structural integrity of a recovered supported catalyst to be use in recycling experiments
    • These results together with recent findings in our laboratories indicated that FT-IR could be used as a routine method for the preliminary structural investigation of this type of materials. The use of this technique can be very convenient for checking the structural integrity of a recovered supported catalyst to be use in recycling experiments.
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    • It has been recently shown that a silica-supported sodium sulfonate can promote the conjugate addition of indoles to unsaturated ketones only in the presence of ionic liquids: Y. Gu, C. Ogawa, S. Kobayashi, Org. Lett. 2007, 9, 175-178.
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    • In other words, this means that when catalyst 1 was used the catalyst loading was approximately 5 mol% each for the tertiary amine and the thiourea residues
    • In other words, this means that when catalyst 1 was used the catalyst loading was approximately 5 mol% each for the tertiary amine and the thiourea residues.
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    • Neither the use of larger amount of extracting diethyl ether, nor the use of other solvents (dioxane, methanol, dichloromethane) both at room and at high temperature allowed the isolation of white materials
    • Neither the use of larger amount of extracting diethyl ether, nor the use of other solvents (dioxane, methanol, dichloromethane) both at room and at high temperature allowed the isolation of white materials.
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    • After drying the supported catalyst at 150°C for 4 h under vacuum the material appeared to be not yellow anymore but a light grey powder.
    • After drying the supported catalyst at 150°C for 4 h under vacuum the material appeared to be not yellow anymore but a light grey powder.
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    • The integrity of catalyst 1 was clearly demonstrated by TGA analysis that showed no traces of degradation of the supported catalyst until 200°C.
    • The integrity of catalyst 1 was clearly demonstrated by TGA analysis that showed no traces of degradation of the supported catalyst until 200°C.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.