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题名: Periodic mesoporous organosilicas with 1,4-diethylenebenzene in the mesoporous wall: Synthesis, characterization, and bioadsorption properties
作者: Li, Congming;  Liu, Jian;  Shi, Xin;  Yang, Jie;  Yang, Qihua
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2007-07-26
DOI: 10.1021/jp071093a
卷: 111, 期:29, 页:10948-10954
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: The 1,4-diethylenebenzene-bridged mesoporous organosilicas and bifunctional periodic mesoporous organosilicas with various amounts of 1,4-diethylenebenzene and ethane bridging groups in the mesoporous wall were synthesized by a direct cocondensation method using P123 as structure-directing agent under acidic conditions. All the materials have ordered mesostructure with uniform pore size distributions. The BET surface area and pore diameter decrease as the amounts of 1,4-diethylenebenzene in the mesoporous wall increase. The composition of the mesoporous organosilicas was characterized by FT-IR, C-13 cross-polarization magic-angle spinning (CP-MAS) NMR, and Si-29 magic-angle spinning (MAS) NMR spectroscopy. The adsorption of lysozyme (Lz) on the resultant materials was studied at different pH values. All the adsorption isotherms have successfully been correlated by the Langmuir equation. The adsorption capacity of all materials reaches the maximum around the isoelectric point of Lz. It was found that the material with mixed composition of 1,4-diethylenebenzene and ethane in the wall exhibits higher adsorption amounts than the mesoporous ethane-silica, and the difference in the adsorption amounts between the two materials decreases as the solution pH increases, suggesting that the hydrophobic and hydrogen-bonding interaction between 1,4-diethylenebenzene and Lz is stronger than that between ethane and Lz, especially at lower pH value. FT-IR spectra of the adsorbed Lz confirm that the adsorption of Lz did not lead to the denaturation of enzyme in the pH range investigated.
关键词[WOS]: MOLECULAR-SCALE PERIODICITY ;  COPOLYMER-ASSISTED SYNTHESIS ;  BRIDGING GROUPS ;  BENZENE-SILICA ;  ORGANIC GROUPS ;  IMMOBILIZATION ;  ADSORPTION ;  ENZYMES ;  SIEVES ;  LYSOZYME
语种: 英语
WOS记录号: WOS:000248121600029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140729
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Congming,Liu, Jian,Shi, Xin,et al. Periodic mesoporous organosilicas with 1,4-diethylenebenzene in the mesoporous wall: Synthesis, characterization, and bioadsorption properties[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(29):10948-10954.
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