Search Results - "Chuah, G.K."

Hydrous Zirconia as a Selective Catalyst for the Meerwein–Ponndorf–Verley Reduction of Cinnamaldehyde by Liu, S.H., Jaenicke, S., Chuah, G.K.

“…Hydrous zirconia was found to be active in the Meerwein–Ponndorf–Verley (MPV) reduction of cinnamaldehyde with 2-propanol. An initial selectivity to cinnamyl…”
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Effect of Er:YAG laser and organic matrix on porosity changes in human enamel by Ying, Deng, Chuah, G.K, Hsu, Chin-Ying S

“…Objectives. Cariostatic effects of lasers have been well documented in the past few decades; however, the mechanisms remain unclear. Our previous study…”
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The preparation of high surface area zirconia — Influence of precipitating agent and digestion by Chuah, G.K., Jaenicke, S.

“…High surface area zirconia was produced by digestion of the hydrous oxide at 100°C for various lengths of time. Precipitation of the hydrous zirconia was…”
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The effect of digestion on the surface area and porosity of alumina by Chuah, G.K, Jaenicke, S, Xu, T.H

“…The stability of gamma alumina with respect to phase transitions and loss of surface area can be greatly improved by digestion of the aluminium hydroxide…”
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High surface area zirconia by digestion of zirconium propoxide at different pH by Chuah, G.K, Liu, S.H, Jaenicke, S, Li, J

“…The microstructure of hydrous zirconia (ZrO 2) prepared by the hydrolysis of zirconium propoxide followed by digestion at pH 1, 3 and 9 and the ZrO 2 derived…”
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A novel and environmental friendly synthetic route for hydroxypyrrolidines using zeolites by Fan, A., Chuah, G.K., Jaenicke, Stephan

“…A critical step in the synthesis of the hydroxypyrrolidines, 1,4-dideoxy-1,4-imino-l-lyxitol and 1,4-dideoxy-1,4-imino-d-lyxitol, from the corresponding…”
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The Preparation of High-Surface-Area Zirconia by Chuah, G.K., Jaenicke, S., Pong, B.K.

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Supported zirconium propoxide—a versatile heterogeneous catalyst for the Meerwein–Ponndorf–Verley reduction by Zhu, Yongzhong, Jaenicke, S, Chuah, G.K

“…Grafting of zirconium 1-propoxide on SBA-15 resulted in highly active catalysts for the MPV reduction. The activity increased with zirconium loading up to a…”
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Thermal and hydrothermal stability of framework-substituted MCM-41 mesoporous materials by Chen, L.Y., Jaenicke, S., Chuah, G.K.

“…The thermal and hydrothermal stability of framework-substituted MCM-41 with a Si/M molar ratio of 40 (M = Al, Ti) is assessed. Si-MCM-41 with 2.5% substitution…”
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Cyclisation of Citronellal to Isopulegol Catalysed by Hydrous Zirconia and Other Solid Acids by Chuah, G.K, Liu, S.H, Jaenicke, S, Harrison, L.J

“…The cyclisation of citronellal to isopulegol is an important step in the synthesis of menthol. Several zirconia-based catalysts were evaluated for this…”
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An investigation into the preparation of high surface area zirconia by Chuah, G.K

“…Hydrous zirconia was digested in solutions containing different cations at constant ionic strength. The influences of the cations, Na +, K +, and NH + 4, on…”
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The Preparation of High-Surface-Area Zirconia: II. Influence of Precipitating Agent and Digestion on the Morphology and Microstructure of Hydrous Zirconia by Chuah, G.K., Jaenicke, S., Pong, B.K.

“…High-surface-area zirconia can be prepared by precipitation from zirconium salts. The initial product from precipitation is a hydrous zirconia of composition…”
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Isomerisation of α-pinene oxide over B2O3/SiO2 and Al-MSU catalysts by RAVINDRA, D. B, NIE, Y. T, JAENICKE, S, CHUAH, G. K

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Organic–inorganic hybrid catalysts for acid- and base-catalyzed reactions by Jaenicke, S, Chuah, G.K, Lin, X.H, Hu, X.C

“…Stable heterogeneous catalysts with adjustable base strength have been prepared by grafting organic amine bases into the the pores of the inorganic mesoporous…”
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A comparison of post-synthesis alumination and sol-gel synthesis of MCM-41 with high framework aluminum content by Chen, L.Y., Ping, Z., Chuah, G.K., Jaenicke, S., Simon, G.

“…Aluminum-containing mesoporous MCM-41 materials were prepared by post-synthesis modification of a purely siliceous MCM-41 using different Al sources: AlCl 3,…”
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The influence of preparation conditions on the surface area of zirconia by Chuah, G.K., Jaenicke, S., Cheong, S.A., Chan, K.S.

“…The conditions for preparation of high surface area zirconia were studied. Samples were prepared by precipitation from aqueous solutions of zirconium chloride…”
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Isomerisation of α-pinene oxide over B 2O 3/SiO 2 and Al-MSU catalysts by Ravindra, D.B., Nie, Y.T., Jaenicke, S., Chuah, G.K.

“…The isomerisation of α-pinene oxide to campholenic aldehyde was investigated over a number of solid acids—B 2O 3/SiO 2, ZnCl 2/MCM-41, Al-MCM-41, HY zeolites…”
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Propylene epoxidation with hydrogen peroxide catalyzed by molecular sieves containing framework titanium by Chen, L.Y, Chuah, G.K, Jaenicke, S

“…The catalytic epoxidation of propylene with aqueous hydrogen peroxide over four Ti-containing silicates, namely titanium silicalite (TS-1), a TiO 2–SiO 2…”
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Catalysts from MCM-41: framework modification, pore size engineering, and organic–inorganic hybrid materials by Chuah, G.K, Hu, X, Zhan, P, Jaenicke, S

“…The mesoporous material, MCM-41, is characterized by an extremely high surface area and a one-dimensional system of cylindrical pores with a narrow size…”
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Liquid-phase regioselective benzylation of bromobenzene and other aromatics over microporous zeolites by Hu, X.C., Chuah, G.K., Jaenicke, S.

“…Various solid acids were investigated for the liquid-phase benzylation of aromatics to industrially important substituted diphenylmethanes. Large-pore…”
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